fffb8897b9
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@20 fc73d0e0-1445-4013-8a0c-d673dee63da5
2696 lines
61 KiB
C
2696 lines
61 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// r_draw.c
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#include "quakedef.h"
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#include "r_local.h"
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#include "d_local.h" // FIXME: shouldn't need to include this
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#define MAXLEFTCLIPEDGES 100
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// !!! if these are changed, they must be changed in asm_draw.h too !!!
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#define FULLY_CLIPPED_CACHED 0x80000000
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#define FRAMECOUNT_MASK 0x7FFFFFFF
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unsigned int cacheoffset;
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int c_faceclip; // number of faces clipped
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zpointdesc_t r_zpointdesc;
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polydesc_t r_polydesc;
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clipplane_t *entity_clipplanes;
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clipplane_t view_clipplanes[4];
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clipplane_t world_clipplanes[16];
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medge_t *r_pedge;
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qboolean r_leftclipped, r_rightclipped;
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static qboolean makeleftedge, makerightedge;
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qboolean r_nearzionly;
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int sintable[SINTABLESIZE];
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int intsintable[SINTABLESIZE];
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mvertex_t r_leftenter, r_leftexit;
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mvertex_t r_rightenter, r_rightexit;
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typedef struct
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{
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float u,v;
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int ceilv;
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} evert_t;
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int r_emitted;
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float r_nearzi;
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float r_u1, r_v1, r_lzi1;
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int r_ceilv1;
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qboolean r_lastvertvalid;
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msurface_t *r_alpha_surfaces;
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int r_skyframe;
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msurface_t *r_skyfaces;
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mplane_t r_skyplanes[6];
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mtexinfo_t r_skytexinfo[6];
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mvertex_t *r_skyverts;
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medge_t *r_skyedges;
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int *r_skysurfedges;
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// I just copied this code from q2...
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int skybox_planes[12] = {2,-128, 0,-128, 2,128, 1,128, 0,128, 1,-128};
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int box_surfedges[24] = { 1,2,3,4, -1,5,6,7, 8,9,-6,10, -2,-7,-9,11,
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12,-3,-11,-8, -12,-10,-5,-4};
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int box_edges[24] = { 1,2, 2,3, 3,4, 4,1, 1,5, 5,6, 6,2, 7,8, 8,6, 5,7, 8,3, 7,4};
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int box_faces[6] = {0,0,2,2,2,0};
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vec3_t box_vecs[6][2] = {
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{ {0,-1,0}, {-1,0,0} },
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{ {0,1,0}, {0,0,-1} },
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{ {0,-1,0}, {1,0,0} },
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{ {1,0,0}, {0,0,-1} },
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{ {0,-1,0}, {0,0,-1} },
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{ {-1,0,0}, {0,0,-1} }
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};
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float box_verts[8][3] = {
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{-1,-1,-1},
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{-1,1,-1},
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{1,1,-1},
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{1,-1,-1},
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{-1,-1,1},
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{-1,1,1},
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{1,-1,1},
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{1,1,1}
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};
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// down, west, up, north, east, south
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// {"rt", "bk", "lf", "ft", "up", "dn"};
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static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
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int r_skysideimage[6] = {5, 2, 4, 1, 0, 3};
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extern mtexinfo_t r_skytexinfo[6];
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char skyname[128];
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void SWR_SetSky (char *name, float rotate, vec3_t axis)
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{
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int i;
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Q_strncpyz (skyname, name, sizeof(skyname));
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// skyrotate = rotate;
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// VectorCopy (axis, skyaxis);
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for (i=0 ; i<6 ; i++)
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{
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r_skytexinfo[i].texture = NULL;
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}
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}
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qboolean SWR_CheckSky (void)
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{
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int i;
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char pathname[MAX_QPATH];
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if (!*skyname)
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return true;
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for (i=0 ; i<6 ; i++)
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{
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sprintf (pathname, "env/%s%s.pcx", skyname, suf[r_skysideimage[i]]);
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if (COM_FCheckExists(pathname))
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{
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continue;// it exists, don't bother going for a tga version
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}
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sprintf (pathname, "env/%s%s.tga", skyname, suf[r_skysideimage[i]]);
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if (!CL_CheckOrDownloadFile(pathname, -1))
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return false;
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}
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return true;
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}
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/*
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================
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R_InitSkyBox
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================
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*/
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void *Mod_LoadWall(char *name);
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void R_InitSkyBox (void)
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{
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int i;
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model_t *wm;
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char pathname[MAX_QPATH];
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wm = cl.worldmodel;
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r_skyfaces = wm->surfaces + wm->numsurfaces;
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wm->numsurfaces += 6;
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r_skyverts = wm->vertexes + wm->numvertexes;
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wm->numvertexes += 8;
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r_skyedges = wm->edges + wm->numedges;
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wm->numedges += 12;
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r_skysurfedges = wm->surfedges + wm->numsurfedges;
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wm->numsurfedges += 24;
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if (wm->numsurfaces > MAX_MAP_FACES
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|| wm->numvertexes > MAX_MAP_VERTS
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|| wm->numedges > MAX_MAP_EDGES)
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Host_Error ("InitSkyBox: map overflow");
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memset (r_skyfaces, 0, 6*sizeof(*r_skyfaces));
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for (i=0 ; i<6 ; i++)
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{
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r_skyplanes[i].normal[skybox_planes[i*2]] = 1;
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r_skyplanes[i].dist = skybox_planes[i*2+1];
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VectorCopy (box_vecs[i][0], r_skytexinfo[i].vecs[0]);
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VectorCopy (box_vecs[i][1], r_skytexinfo[i].vecs[1]);
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r_skyfaces[i].plane = &r_skyplanes[i];
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r_skyfaces[i].numedges = 4;
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r_skyfaces[i].flags = box_faces[i] | SURF_DRAWSKYBOX;
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r_skyfaces[i].firstedge = wm->numsurfedges-24+i*4;
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r_skyfaces[i].texinfo = &r_skytexinfo[i];
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r_skyfaces[i].texturemins[0] = -128;
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r_skyfaces[i].texturemins[1] = -128;
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r_skyfaces[i].extents[0] = 256;
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r_skyfaces[i].extents[1] = 256;
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}
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for (i=0 ; i<24 ; i++)
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if (box_surfedges[i] > 0)
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r_skysurfedges[i] = wm->numedges-13 + box_surfedges[i];
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else
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r_skysurfedges[i] = - (wm->numedges-13 + -box_surfedges[i]);
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for(i=0 ; i<12 ; i++)
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{
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r_skyedges[i].v[0] = wm->numvertexes-9+box_edges[i*2+0];
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r_skyedges[i].v[1] = wm->numvertexes-9+box_edges[i*2+1];
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r_skyedges[i].cachededgeoffset = 0;
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}
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for (i=0 ; i<6 ; i++)
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{
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sprintf (pathname, "env/%s%s.tga", skyname, suf[r_skysideimage[i]]);
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r_skytexinfo[i].texture = Mod_LoadWall (pathname); //preferable
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if (!r_skytexinfo[i].texture)
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{
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sprintf (pathname, "env/%s%s.pcx", skyname, suf[r_skysideimage[i]]);
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r_skytexinfo[i].texture = Mod_LoadWall (pathname); //q2 fall back
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}
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}
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}
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/*
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================
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R_EmitSkyBox
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================
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*/
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qboolean R_EmitSkyBox (void)
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{
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int i, j;
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int oldkey;
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if (insubmodel)
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return false; // submodels should never have skies
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if (r_skyframe == r_framecount)
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return true; // already set this frame
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if (!*skyname) //none set
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return false;
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r_skyframe = r_framecount;
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// set the eight fake vertexes
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for (i=0 ; i<8 ; i++)
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for (j=0 ; j<3 ; j++)
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r_skyverts[i].position[j] = r_origin[j] + box_verts[i][j]*128;
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// set the six fake planes
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for (i=0 ; i<6 ; i++)
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if (skybox_planes[i*2+1] > 0)
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r_skyplanes[i].dist = r_origin[skybox_planes[i*2]]+128;
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else
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r_skyplanes[i].dist = r_origin[skybox_planes[i*2]]-128;
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// fix texture offseets
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for (i=0 ; i<6 ; i++)
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{
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r_skytexinfo[i].vecs[0][3] = -DotProduct (r_origin, r_skytexinfo[i].vecs[0]);
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r_skytexinfo[i].vecs[1][3] = -DotProduct (r_origin, r_skytexinfo[i].vecs[1]);
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}
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// emit the six faces
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oldkey = r_currentkey;
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r_currentkey = 0x7ffffff0;
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for (i=0 ; i<6 ; i++)
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{
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R_RenderFace (r_skyfaces + i, 15);
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}
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r_currentkey = oldkey; // bsp sorting order
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return true;
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}
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#if !id386
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/*
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================
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R_EmitEdge
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================
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*/
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void R_EmitEdge (mvertex_t *pv0, mvertex_t *pv1)
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{
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edge_t *edge, *pcheck;
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int u_check;
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float u, u_step;
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vec3_t local, transformed;
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float *world;
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int v, v2, ceilv0;
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float scale, lzi0, u0, v0;
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int side;
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if (r_lastvertvalid)
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{
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u0 = r_u1;
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v0 = r_v1;
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lzi0 = r_lzi1;
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ceilv0 = r_ceilv1;
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}
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else
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{
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world = &pv0->position[0];
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// transform and project
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VectorSubtract (world, modelorg, local);
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TransformVector (local, transformed);
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if (transformed[2] < NEAR_CLIP)
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transformed[2] = NEAR_CLIP;
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lzi0 = 1.0 / transformed[2];
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// FIXME: build x/yscale into transform?
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scale = xscale * lzi0;
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u0 = (xcenter + scale*transformed[0]);
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if (u0 < r_refdef.fvrectx_adj)
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u0 = r_refdef.fvrectx_adj;
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if (u0 > r_refdef.fvrectright_adj)
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u0 = r_refdef.fvrectright_adj;
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scale = yscale * lzi0;
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v0 = (ycenter - scale*transformed[1]);
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if (v0 < r_refdef.fvrecty_adj)
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v0 = r_refdef.fvrecty_adj;
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if (v0 > r_refdef.fvrectbottom_adj)
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v0 = r_refdef.fvrectbottom_adj;
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ceilv0 = (int) ceil(v0);
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}
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world = &pv1->position[0];
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// transform and project
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VectorSubtract (world, modelorg, local);
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TransformVector (local, transformed);
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if (transformed[2] < NEAR_CLIP)
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transformed[2] = NEAR_CLIP;
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r_lzi1 = 1.0 / transformed[2];
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scale = xscale * r_lzi1;
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r_u1 = (xcenter + scale*transformed[0]);
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if (r_u1 < r_refdef.fvrectx_adj)
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r_u1 = r_refdef.fvrectx_adj;
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if (r_u1 > r_refdef.fvrectright_adj)
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r_u1 = r_refdef.fvrectright_adj;
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scale = yscale * r_lzi1;
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r_v1 = (ycenter - scale*transformed[1]);
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if (r_v1 < r_refdef.fvrecty_adj)
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r_v1 = r_refdef.fvrecty_adj;
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if (r_v1 > r_refdef.fvrectbottom_adj)
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r_v1 = r_refdef.fvrectbottom_adj;
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if (r_lzi1 > lzi0)
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lzi0 = r_lzi1;
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if (lzi0 > r_nearzi) // for mipmap finding
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r_nearzi = lzi0;
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// for right edges, all we want is the effect on 1/z
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if (r_nearzionly)
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return;
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r_emitted = 1;
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r_ceilv1 = (int) ceil(r_v1);
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// create the edge
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if (ceilv0 == r_ceilv1)
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{
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// we cache unclipped horizontal edges as fully clipped
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if (cacheoffset != 0x7FFFFFFF)
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{
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cacheoffset = FULLY_CLIPPED_CACHED |
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(r_framecount & FRAMECOUNT_MASK);
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}
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return; // horizontal edge
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}
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side = ceilv0 > r_ceilv1;
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edge = edge_p++;
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edge->owner = r_pedge;
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edge->nearzi = lzi0;
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if (side == 0)
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{
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// trailing edge (go from p1 to p2)
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v = ceilv0;
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v2 = r_ceilv1 - 1;
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edge->surfs[0] = surface_p - surfaces;
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edge->surfs[1] = 0;
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u_step = ((r_u1 - u0) / (r_v1 - v0));
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u = u0 + ((float)v - v0) * u_step;
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}
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else
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{
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// leading edge (go from p2 to p1)
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v2 = ceilv0 - 1;
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v = r_ceilv1;
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edge->surfs[0] = 0;
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edge->surfs[1] = surface_p - surfaces;
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u_step = ((u0 - r_u1) / (v0 - r_v1));
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u = r_u1 + ((float)v - r_v1) * u_step;
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}
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edge->u_step = u_step*0x100000;
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edge->u = u*0x100000 + 0xFFFFF;
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// we need to do this to avoid stepping off the edges if a very nearly
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// horizontal edge is less than epsilon above a scan, and numeric error causes
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// it to incorrectly extend to the scan, and the extension of the line goes off
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// the edge of the screen
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// FIXME: is this actually needed?
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if (edge->u < r_refdef.vrect_x_adj_shift20)
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edge->u = r_refdef.vrect_x_adj_shift20;
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if (edge->u > r_refdef.vrectright_adj_shift20)
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edge->u = r_refdef.vrectright_adj_shift20;
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//
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// sort the edge in normally
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//
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u_check = edge->u;
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if (edge->surfs[0])
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u_check++; // sort trailers after leaders
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if (!newedges[v] || newedges[v]->u >= u_check)
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{
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edge->next = newedges[v];
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newedges[v] = edge;
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}
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else
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{
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pcheck = newedges[v];
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while (pcheck->next && pcheck->next->u < u_check)
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pcheck = pcheck->next;
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edge->next = pcheck->next;
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pcheck->next = edge;
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}
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edge->nextremove = removeedges[v2];
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removeedges[v2] = edge;
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}
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/*
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================
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R_ClipEdge
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================
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*/
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void R_ClipEdge (mvertex_t *pv0, mvertex_t *pv1, clipplane_t *clip)
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{
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float d0, d1, f;
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mvertex_t clipvert;
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if (clip)
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{
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do
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{
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d0 = DotProduct (pv0->position, clip->normal) - clip->dist;
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d1 = DotProduct (pv1->position, clip->normal) - clip->dist;
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if (d0 >= 0)
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{
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// point 0 is unclipped
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if (d1 >= 0)
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{
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// both points are unclipped
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continue;
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}
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// only point 1 is clipped
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// we don't cache clipped edges
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cacheoffset = 0x7FFFFFFF;
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f = d0 / (d0 - d1);
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clipvert.position[0] = pv0->position[0] +
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f * (pv1->position[0] - pv0->position[0]);
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clipvert.position[1] = pv0->position[1] +
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f * (pv1->position[1] - pv0->position[1]);
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clipvert.position[2] = pv0->position[2] +
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f * (pv1->position[2] - pv0->position[2]);
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if (clip->leftedge)
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{
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r_leftclipped = true;
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r_leftexit = clipvert;
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}
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else if (clip->rightedge)
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{
|
|
r_rightclipped = true;
|
|
r_rightexit = clipvert;
|
|
}
|
|
|
|
R_ClipEdge (pv0, &clipvert, clip->next);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
// point 0 is clipped
|
|
if (d1 < 0)
|
|
{
|
|
// both points are clipped
|
|
// we do cache fully clipped edges
|
|
if (!r_leftclipped)
|
|
cacheoffset = FULLY_CLIPPED_CACHED |
|
|
(r_framecount & FRAMECOUNT_MASK);
|
|
return;
|
|
}
|
|
|
|
// only point 0 is clipped
|
|
r_lastvertvalid = false;
|
|
|
|
// we don't cache partially clipped edges
|
|
cacheoffset = 0x7FFFFFFF;
|
|
|
|
f = d0 / (d0 - d1);
|
|
clipvert.position[0] = pv0->position[0] +
|
|
f * (pv1->position[0] - pv0->position[0]);
|
|
clipvert.position[1] = pv0->position[1] +
|
|
f * (pv1->position[1] - pv0->position[1]);
|
|
clipvert.position[2] = pv0->position[2] +
|
|
f * (pv1->position[2] - pv0->position[2]);
|
|
|
|
if (clip->leftedge)
|
|
{
|
|
r_leftclipped = true;
|
|
r_leftenter = clipvert;
|
|
}
|
|
else if (clip->rightedge)
|
|
{
|
|
r_rightclipped = true;
|
|
r_rightenter = clipvert;
|
|
}
|
|
|
|
R_ClipEdge (&clipvert, pv1, clip->next);
|
|
return;
|
|
}
|
|
} while ((clip = clip->next) != NULL);
|
|
}
|
|
|
|
// add the edge
|
|
R_EmitEdge (pv0, pv1);
|
|
}
|
|
|
|
#endif // !id386
|
|
|
|
|
|
/*
|
|
================
|
|
R_EmitCachedEdge
|
|
================
|
|
*/
|
|
void R_EmitCachedEdge (void)
|
|
{
|
|
edge_t *pedge_t;
|
|
|
|
pedge_t = (edge_t *)((unsigned long)r_edges + r_pedge->cachededgeoffset);
|
|
|
|
if (!pedge_t->surfs[0])
|
|
pedge_t->surfs[0] = surface_p - surfaces;
|
|
else
|
|
pedge_t->surfs[1] = surface_p - surfaces;
|
|
|
|
if (pedge_t->nearzi > r_nearzi) // for mipmap finding
|
|
r_nearzi = pedge_t->nearzi;
|
|
|
|
r_emitted = 1;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_RenderFace
|
|
================
|
|
*/
|
|
void R_RenderFace (msurface_t *fa, int clipflags)
|
|
{
|
|
int i, lindex;
|
|
unsigned mask;
|
|
mplane_t *pplane;
|
|
float distinv;
|
|
vec3_t p_normal;
|
|
medge_t *pedges, tedge;
|
|
clipplane_t *pclip;
|
|
|
|
if (fa->texinfo->texture && (*fa->texinfo->texture->name == '{' || fa->texinfo->flags & (SURF_TRANS33|SURF_TRANS66)))
|
|
{
|
|
if (fa->nextalphasurface)
|
|
return;
|
|
|
|
fa->nextalphasurface = r_alpha_surfaces;
|
|
r_alpha_surfaces = fa;
|
|
return;
|
|
}
|
|
|
|
if ( fa->texinfo->flags & SURF_SKY)
|
|
{
|
|
if (R_EmitSkyBox ())
|
|
return;
|
|
}
|
|
|
|
// skip out if no more surfs
|
|
if ((surface_p) >= surf_max)
|
|
{
|
|
r_outofsurfaces++;
|
|
return;
|
|
}
|
|
|
|
// ditto if not enough edges left, or switch to auxedges if possible
|
|
if ((edge_p + fa->numedges + 4) >= edge_max)
|
|
{
|
|
r_outofedges += fa->numedges;
|
|
return;
|
|
}
|
|
|
|
c_faceclip++;
|
|
|
|
// set up clip planes
|
|
pclip = NULL;
|
|
|
|
for (i=3, mask = 0x08 ; i>=0 ; i--, mask >>= 1)
|
|
{
|
|
if (clipflags & mask)
|
|
{
|
|
view_clipplanes[i].next = pclip;
|
|
pclip = &view_clipplanes[i];
|
|
}
|
|
}
|
|
|
|
|
|
// push the edges through
|
|
r_emitted = 0;
|
|
r_nearzi = 0;
|
|
r_nearzionly = false;
|
|
makeleftedge = makerightedge = false;
|
|
pedges = currententity->model->edges;
|
|
r_lastvertvalid = false;
|
|
|
|
for (i=0 ; i<fa->numedges ; i++)
|
|
{
|
|
lindex = currententity->model->surfedges[fa->firstedge + i];
|
|
|
|
if (lindex > 0)
|
|
{
|
|
r_pedge = &pedges[lindex];
|
|
|
|
// if the edge is cached, we can just reuse the edge
|
|
if (!insubmodel)
|
|
{
|
|
if (r_pedge->cachededgeoffset & FULLY_CLIPPED_CACHED)
|
|
{
|
|
if ((r_pedge->cachededgeoffset & FRAMECOUNT_MASK) ==
|
|
r_framecount)
|
|
{
|
|
r_lastvertvalid = false;
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((((unsigned long)edge_p - (unsigned long)r_edges) >
|
|
r_pedge->cachededgeoffset) &&
|
|
(((edge_t *)((unsigned long)r_edges +
|
|
r_pedge->cachededgeoffset))->owner == r_pedge))
|
|
{
|
|
R_EmitCachedEdge ();
|
|
r_lastvertvalid = false;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// assume it's cacheable
|
|
cacheoffset = (qbyte *)edge_p - (qbyte *)r_edges;
|
|
r_leftclipped = r_rightclipped = false;
|
|
R_ClipEdge (&r_pcurrentvertbase[r_pedge->v[0]],
|
|
&r_pcurrentvertbase[r_pedge->v[1]],
|
|
pclip);
|
|
r_pedge->cachededgeoffset = cacheoffset;
|
|
|
|
if (r_leftclipped)
|
|
makeleftedge = true;
|
|
if (r_rightclipped)
|
|
makerightedge = true;
|
|
r_lastvertvalid = true;
|
|
}
|
|
else
|
|
{
|
|
lindex = -lindex;
|
|
r_pedge = &pedges[lindex];
|
|
// if the edge is cached, we can just reuse the edge
|
|
if (!insubmodel)
|
|
{
|
|
if (r_pedge->cachededgeoffset & FULLY_CLIPPED_CACHED)
|
|
{
|
|
if ((r_pedge->cachededgeoffset & FRAMECOUNT_MASK) ==
|
|
r_framecount)
|
|
{
|
|
r_lastvertvalid = false;
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// it's cached if the cached edge is valid and is owned
|
|
// by this medge_t
|
|
if ((((unsigned long)edge_p - (unsigned long)r_edges) >
|
|
r_pedge->cachededgeoffset) &&
|
|
(((edge_t *)((unsigned long)r_edges +
|
|
r_pedge->cachededgeoffset))->owner == r_pedge))
|
|
{
|
|
R_EmitCachedEdge ();
|
|
r_lastvertvalid = false;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// assume it's cacheable
|
|
cacheoffset = (qbyte *)edge_p - (qbyte *)r_edges;
|
|
r_leftclipped = r_rightclipped = false;
|
|
R_ClipEdge (&r_pcurrentvertbase[r_pedge->v[1]],
|
|
&r_pcurrentvertbase[r_pedge->v[0]],
|
|
pclip);
|
|
r_pedge->cachededgeoffset = cacheoffset;
|
|
|
|
if (r_leftclipped)
|
|
makeleftedge = true;
|
|
if (r_rightclipped)
|
|
makerightedge = true;
|
|
r_lastvertvalid = true;
|
|
}
|
|
}
|
|
|
|
// if there was a clip off the left edge, add that edge too
|
|
// FIXME: faster to do in screen space?
|
|
// FIXME: share clipped edges?
|
|
if (makeleftedge)
|
|
{
|
|
r_pedge = &tedge;
|
|
r_lastvertvalid = false;
|
|
R_ClipEdge (&r_leftexit, &r_leftenter, pclip->next);
|
|
}
|
|
|
|
// if there was a clip off the right edge, get the right r_nearzi
|
|
if (makerightedge)
|
|
{
|
|
r_pedge = &tedge;
|
|
r_lastvertvalid = false;
|
|
r_nearzionly = true;
|
|
R_ClipEdge (&r_rightexit, &r_rightenter, view_clipplanes[1].next);
|
|
}
|
|
|
|
// if no edges made it out, return without posting the surface
|
|
if (!r_emitted)
|
|
return;
|
|
|
|
r_polycount++;
|
|
|
|
surface_p->data = (void *)fa;
|
|
surface_p->nearzi = r_nearzi;
|
|
surface_p->flags = fa->flags;
|
|
surface_p->insubmodel = insubmodel;
|
|
surface_p->spanstate = 0;
|
|
surface_p->entity = currententity;
|
|
surface_p->key = r_currentkey++;
|
|
surface_p->spans = NULL;
|
|
|
|
pplane = fa->plane;
|
|
// FIXME: cache this?
|
|
TransformVector (pplane->normal, p_normal);
|
|
// FIXME: cache this?
|
|
distinv = 1.0 / (pplane->dist - DotProduct (modelorg, pplane->normal));
|
|
|
|
surface_p->d_zistepu = p_normal[0] * xscaleinv * distinv;
|
|
surface_p->d_zistepv = -p_normal[1] * yscaleinv * distinv;
|
|
surface_p->d_ziorigin = p_normal[2] * distinv -
|
|
xcenter * surface_p->d_zistepu -
|
|
ycenter * surface_p->d_zistepv;
|
|
|
|
//JDC VectorCopy (r_worldmodelorg, surface_p->modelorg);
|
|
surface_p++;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_RenderBmodelFace
|
|
================
|
|
*/
|
|
void R_RenderBmodelFace (bedge_t *pedges, msurface_t *psurf)
|
|
{
|
|
int i;
|
|
unsigned mask;
|
|
mplane_t *pplane;
|
|
float distinv;
|
|
vec3_t p_normal;
|
|
medge_t tedge;
|
|
clipplane_t *pclip;
|
|
|
|
// skip out if no more surfs
|
|
if (surface_p >= surf_max)
|
|
{
|
|
r_outofsurfaces++;
|
|
return;
|
|
}
|
|
|
|
if (*psurf->texinfo->texture->name == '{' || psurf->texinfo->flags & (SURF_TRANS33|SURF_TRANS66))
|
|
{
|
|
if (psurf->nextalphasurface)
|
|
return;
|
|
|
|
psurf->nextalphasurface = r_alpha_surfaces;
|
|
r_alpha_surfaces = psurf;
|
|
return;
|
|
}
|
|
|
|
// ditto if not enough edges left, or switch to auxedges if possible
|
|
if ((edge_p + psurf->numedges + 4) >= edge_max)
|
|
{
|
|
r_outofedges += psurf->numedges;
|
|
return;
|
|
}
|
|
|
|
c_faceclip++;
|
|
|
|
// this is a dummy to give the caching mechanism someplace to write to
|
|
r_pedge = &tedge;
|
|
|
|
// set up clip planes
|
|
pclip = NULL;
|
|
|
|
for (i=3, mask = 0x08 ; i>=0 ; i--, mask >>= 1)
|
|
{
|
|
if (r_clipflags & mask)
|
|
{
|
|
view_clipplanes[i].next = pclip;
|
|
pclip = &view_clipplanes[i];
|
|
}
|
|
}
|
|
|
|
// push the edges through
|
|
r_emitted = 0;
|
|
r_nearzi = 0;
|
|
r_nearzionly = false;
|
|
makeleftedge = makerightedge = false;
|
|
// FIXME: keep clipped bmodel edges in clockwise order so last vertex caching
|
|
// can be used?
|
|
r_lastvertvalid = false;
|
|
|
|
for ( ; pedges ; pedges = pedges->pnext)
|
|
{
|
|
r_leftclipped = r_rightclipped = false;
|
|
R_ClipEdge (pedges->v[0], pedges->v[1], pclip);
|
|
|
|
if (r_leftclipped)
|
|
makeleftedge = true;
|
|
if (r_rightclipped)
|
|
makerightedge = true;
|
|
}
|
|
|
|
// if there was a clip off the left edge, add that edge too
|
|
// FIXME: faster to do in screen space?
|
|
// FIXME: share clipped edges?
|
|
if (makeleftedge)
|
|
{
|
|
r_pedge = &tedge;
|
|
R_ClipEdge (&r_leftexit, &r_leftenter, pclip->next);
|
|
}
|
|
|
|
// if there was a clip off the right edge, get the right r_nearzi
|
|
if (makerightedge)
|
|
{
|
|
r_pedge = &tedge;
|
|
r_nearzionly = true;
|
|
R_ClipEdge (&r_rightexit, &r_rightenter, view_clipplanes[1].next);
|
|
}
|
|
|
|
// if no edges made it out, return without posting the surface
|
|
if (!r_emitted)
|
|
return;
|
|
|
|
r_polycount++;
|
|
|
|
surface_p->data = (void *)psurf;
|
|
surface_p->nearzi = r_nearzi;
|
|
surface_p->flags = psurf->flags;
|
|
surface_p->insubmodel = true;
|
|
surface_p->spanstate = 0;
|
|
surface_p->entity = currententity;
|
|
surface_p->key = r_currentbkey;
|
|
surface_p->spans = NULL;
|
|
|
|
pplane = psurf->plane;
|
|
// FIXME: cache this?
|
|
TransformVector (pplane->normal, p_normal);
|
|
// FIXME: cache this?
|
|
distinv = 1.0 / (pplane->dist - DotProduct (modelorg, pplane->normal));
|
|
|
|
surface_p->d_zistepu = p_normal[0] * xscaleinv * distinv;
|
|
surface_p->d_zistepv = -p_normal[1] * yscaleinv * distinv;
|
|
surface_p->d_ziorigin = p_normal[2] * distinv -
|
|
xcenter * surface_p->d_zistepu -
|
|
ycenter * surface_p->d_zistepv;
|
|
|
|
//JDC VectorCopy (r_worldmodelorg, surface_p->modelorg);
|
|
surface_p++;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_RenderPoly
|
|
================
|
|
*/
|
|
void R_RenderPoly (msurface_t *fa, int clipflags)
|
|
{
|
|
int i, lindex, lnumverts, s_axis, t_axis;
|
|
float dist, lastdist, lzi, scale, u, v, frac;
|
|
unsigned mask;
|
|
vec3_t local, transformed;
|
|
clipplane_t *pclip;
|
|
medge_t *pedges;
|
|
mplane_t *pplane;
|
|
mvertex_t verts[2][100]; //FIXME: do real number
|
|
polyvert_t pverts[100]; //FIXME: do real number, safely
|
|
int vertpage, newverts, newpage, lastvert;
|
|
qboolean visible;
|
|
|
|
// FIXME: clean this up and make it faster
|
|
// FIXME: guard against running out of vertices
|
|
|
|
s_axis = t_axis = 0; // keep compiler happy
|
|
|
|
// set up clip planes
|
|
pclip = NULL;
|
|
|
|
for (i=3, mask = 0x08 ; i>=0 ; i--, mask >>= 1)
|
|
{
|
|
if (clipflags & mask)
|
|
{
|
|
view_clipplanes[i].next = pclip;
|
|
pclip = &view_clipplanes[i];
|
|
}
|
|
}
|
|
|
|
// reconstruct the polygon
|
|
// FIXME: these should be precalculated and loaded off disk
|
|
pedges = currententity->model->edges;
|
|
lnumverts = fa->numedges;
|
|
vertpage = 0;
|
|
|
|
for (i=0 ; i<lnumverts ; i++)
|
|
{
|
|
lindex = currententity->model->surfedges[fa->firstedge + i];
|
|
|
|
if (lindex > 0)
|
|
{
|
|
r_pedge = &pedges[lindex];
|
|
verts[0][i] = r_pcurrentvertbase[r_pedge->v[0]];
|
|
}
|
|
else
|
|
{
|
|
r_pedge = &pedges[-lindex];
|
|
verts[0][i] = r_pcurrentvertbase[r_pedge->v[1]];
|
|
}
|
|
}
|
|
|
|
// clip the polygon, done if not visible
|
|
while (pclip)
|
|
{
|
|
lastvert = lnumverts - 1;
|
|
lastdist = DotProduct (verts[vertpage][lastvert].position,
|
|
pclip->normal) - pclip->dist;
|
|
|
|
visible = false;
|
|
newverts = 0;
|
|
newpage = vertpage ^ 1;
|
|
|
|
for (i=0 ; i<lnumverts ; i++)
|
|
{
|
|
dist = DotProduct (verts[vertpage][i].position, pclip->normal) -
|
|
pclip->dist;
|
|
|
|
if ((lastdist > 0) != (dist > 0))
|
|
{
|
|
frac = dist / (dist - lastdist);
|
|
verts[newpage][newverts].position[0] =
|
|
verts[vertpage][i].position[0] +
|
|
((verts[vertpage][lastvert].position[0] -
|
|
verts[vertpage][i].position[0]) * frac);
|
|
verts[newpage][newverts].position[1] =
|
|
verts[vertpage][i].position[1] +
|
|
((verts[vertpage][lastvert].position[1] -
|
|
verts[vertpage][i].position[1]) * frac);
|
|
verts[newpage][newverts].position[2] =
|
|
verts[vertpage][i].position[2] +
|
|
((verts[vertpage][lastvert].position[2] -
|
|
verts[vertpage][i].position[2]) * frac);
|
|
newverts++;
|
|
}
|
|
|
|
if (dist >= 0)
|
|
{
|
|
verts[newpage][newverts] = verts[vertpage][i];
|
|
newverts++;
|
|
visible = true;
|
|
}
|
|
|
|
lastvert = i;
|
|
lastdist = dist;
|
|
}
|
|
|
|
if (!visible || (newverts < 3))
|
|
return;
|
|
|
|
lnumverts = newverts;
|
|
vertpage ^= 1;
|
|
pclip = pclip->next;
|
|
}
|
|
|
|
// transform and project, remembering the z values at the vertices and
|
|
// r_nearzi, and extract the s and t coordinates at the vertices
|
|
pplane = fa->plane;
|
|
switch (pplane->type)
|
|
{
|
|
case PLANE_X:
|
|
case PLANE_ANYX:
|
|
s_axis = 1;
|
|
t_axis = 2;
|
|
break;
|
|
case PLANE_Y:
|
|
case PLANE_ANYY:
|
|
s_axis = 0;
|
|
t_axis = 2;
|
|
break;
|
|
case PLANE_Z:
|
|
case PLANE_ANYZ:
|
|
s_axis = 0;
|
|
t_axis = 1;
|
|
break;
|
|
}
|
|
|
|
r_nearzi = 0;
|
|
|
|
for (i=0 ; i<lnumverts ; i++)
|
|
{
|
|
// transform and project
|
|
VectorSubtract (verts[vertpage][i].position, modelorg, local);
|
|
TransformVector (local, transformed);
|
|
|
|
if (transformed[2] < NEAR_CLIP)
|
|
transformed[2] = NEAR_CLIP;
|
|
|
|
lzi = 1.0 / transformed[2];
|
|
|
|
if (lzi > r_nearzi) // for mipmap finding
|
|
r_nearzi = lzi;
|
|
|
|
// FIXME: build x/yscale into transform?
|
|
scale = xscale * lzi;
|
|
u = (xcenter + scale*transformed[0]);
|
|
if (u < r_refdef.fvrectx_adj)
|
|
u = r_refdef.fvrectx_adj;
|
|
if (u > r_refdef.fvrectright_adj)
|
|
u = r_refdef.fvrectright_adj;
|
|
|
|
scale = yscale * lzi;
|
|
v = (ycenter - scale*transformed[1]);
|
|
if (v < r_refdef.fvrecty_adj)
|
|
v = r_refdef.fvrecty_adj;
|
|
if (v > r_refdef.fvrectbottom_adj)
|
|
v = r_refdef.fvrectbottom_adj;
|
|
|
|
pverts[i].u = u;
|
|
pverts[i].v = v;
|
|
pverts[i].zi = lzi;
|
|
pverts[i].s = verts[vertpage][i].position[s_axis];
|
|
pverts[i].t = verts[vertpage][i].position[t_axis];
|
|
}
|
|
|
|
// build the polygon descriptor, including fa, r_nearzi, and u, v, s, t, and z
|
|
// for each vertex
|
|
r_polydesc.numverts = lnumverts;
|
|
r_polydesc.nearzi = r_nearzi;
|
|
r_polydesc.pcurrentface = fa;
|
|
r_polydesc.pverts = pverts;
|
|
|
|
// draw the polygon
|
|
D_DrawPoly ();
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_ZDrawSubmodelPolys
|
|
================
|
|
*/
|
|
void R_ZDrawSubmodelPolys (model_t *pmodel)
|
|
{
|
|
int i, numsurfaces;
|
|
msurface_t *psurf;
|
|
float dot;
|
|
mplane_t *pplane;
|
|
|
|
psurf = &pmodel->surfaces[pmodel->firstmodelsurface];
|
|
numsurfaces = pmodel->nummodelsurfaces;
|
|
|
|
for (i=0 ; i<numsurfaces ; i++, psurf++)
|
|
{
|
|
// find which side of the node we are on
|
|
pplane = psurf->plane;
|
|
|
|
dot = DotProduct (modelorg, pplane->normal) - pplane->dist;
|
|
|
|
// draw the polygon
|
|
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
{
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
R_RenderPoly (psurf, 15);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//this code from Quake2
|
|
|
|
typedef struct
|
|
{
|
|
int nump;
|
|
emitpoint_t *pverts;
|
|
qbyte *pixels; // image
|
|
int pixel_width; // image width
|
|
int pixel_height; // image height
|
|
vec3_t vup, vright, vpn; // in worldspace, for plane eq
|
|
float dist;
|
|
float s_offset, t_offset;
|
|
float viewer_position[3];
|
|
void (*drawspanlet)( void );
|
|
int stipple_parity;
|
|
int alpha;
|
|
} q2polydesc_t;
|
|
|
|
q2polydesc_t r_q2polydesc;
|
|
static espan_t *s_polygon_spans;
|
|
static int clip_current;
|
|
static int s_minindex, s_maxindex;
|
|
vec5_t r_clip_verts[2][MAXWORKINGVERTS+2];
|
|
|
|
|
|
|
|
model_t *currentmodel;
|
|
|
|
#define AFFINE_SPANLET_SIZE 16
|
|
#define AFFINE_SPANLET_SIZE_BITS 4
|
|
|
|
typedef struct
|
|
{
|
|
qbyte *pbase, *pdest;
|
|
short *pz;
|
|
fixed16_t s, t;
|
|
fixed16_t sstep, tstep;
|
|
int izi, izistep, izistep_times_2;
|
|
int spancount;
|
|
unsigned u, v;
|
|
} spanletvars_t;
|
|
|
|
spanletvars_t s_spanletvars;
|
|
|
|
void R_DrawSpanletTurbulentStipple33( void )
|
|
{
|
|
extern int *r_turb_turb;
|
|
unsigned btemp;
|
|
int sturb, tturb;
|
|
qbyte *pdest = s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
if ( s_spanletvars.v & 1 )
|
|
{
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( s_spanletvars.u & 1 )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
** R_DrawSpanletTurbulentStipple66
|
|
*/
|
|
void R_DrawSpanletTurbulentStipple66( void )
|
|
{
|
|
extern int *r_turb_turb;
|
|
unsigned btemp;
|
|
int sturb, tturb;
|
|
qbyte *pdest = s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
if ( !( s_spanletvars.v & 1 ) )
|
|
{
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( s_spanletvars.u & 1 )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
|
|
s_spanletvars.spancount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
** R_DrawSpanletTurbulentBlended
|
|
*/
|
|
/*void R_DrawSpanletTurbulentBlended66( void )
|
|
{
|
|
extern int *r_turb_turb;
|
|
unsigned btemp;
|
|
int sturb, tturb;
|
|
|
|
do
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *s_spanletvars.pz <= ( s_spanletvars.izi >> 16 ) )
|
|
*s_spanletvars.pdest = vid.alphamap[btemp*256+*s_spanletvars.pdest];
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
} while ( --s_spanletvars.spancount > 0 );
|
|
}
|
|
|
|
void R_DrawSpanletTurbulentBlended33( void )
|
|
{
|
|
unsigned btemp;
|
|
int sturb, tturb;
|
|
|
|
do
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *s_spanletvars.pz <= ( s_spanletvars.izi >> 16 ) )
|
|
*s_spanletvars.pdest = vid.alphamap[btemp+*s_spanletvars.pdest*256];
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
} while ( --s_spanletvars.spancount > 0 );
|
|
}
|
|
*/
|
|
/*
|
|
** R_DrawSpanlet33
|
|
*/
|
|
/*void R_DrawSpanlet33( void )
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = vid.alphamap[btemp+*s_spanletvars.pdest*256];
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
|
|
void R_DrawSpanletConstant33( void )
|
|
{
|
|
do
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = vid.alphamap[r_polyblendcolor+*s_spanletvars.pdest*256];
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
*/
|
|
/*
|
|
** R_DrawSpanlet66
|
|
*/
|
|
/*
|
|
void R_DrawSpanlet66( void )
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = vid.alphamap[btemp*256+*s_spanletvars.pdest];
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
*/
|
|
|
|
void R_DrawSpanletConstant( void )
|
|
{
|
|
do
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = 15;//r_polyblendcolor;
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
/*
|
|
** R_DrawSpanlet33Stipple
|
|
*/
|
|
void R_DrawSpanlet33Stipple( void )
|
|
{
|
|
unsigned btemp;
|
|
qbyte *pdest = s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.v & 1 ) )
|
|
{
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.u & 1 ) )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) );
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
}
|
|
void R_16DrawSpanlet33Stipple( void )
|
|
{
|
|
unsigned btemp;
|
|
unsigned short *pdest = (unsigned short *)s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.v & 1 ) )
|
|
{
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.u & 1 ) )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) );
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
void R_8DrawSpanletAlphaTest( void ) //8 bit rendering only
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = btemp;
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
|
|
void R_16DrawSpanletAlphaTest( void ) //16 bit rendering only
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = btemp;
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
|
|
void R_8DrawSpanletBlended( void ) //8 bit FIXME
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
// if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = t_lookup[1][btemp][*s_spanletvars.pdest];
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest++;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
|
|
void R_32DrawSpanletAlphaTest( void )
|
|
{
|
|
unsigned btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = *((int *)s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp &0xff000000 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*(int*)s_spanletvars.pdest = btemp;
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest+=4;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
void R_32DrawSpanletBlended( void )
|
|
{
|
|
unsigned *btemp;
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = s_spanletvars.s >> 16;
|
|
tt = s_spanletvars.t >> 16;
|
|
|
|
btemp = ((unsigned int *)s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( ((qbyte *)btemp)[3] )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
((qbyte *)s_spanletvars.pdest)[0] = (((qbyte *)s_spanletvars.pdest)[0]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[2]*r_q2polydesc.alpha)/255;
|
|
((qbyte *)s_spanletvars.pdest)[1] = (((qbyte *)s_spanletvars.pdest)[1]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[1]*r_q2polydesc.alpha)/255;
|
|
((qbyte *)s_spanletvars.pdest)[2] = (((qbyte *)s_spanletvars.pdest)[2]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[0]*r_q2polydesc.alpha)/255;
|
|
}
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest+=4;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
} while (--s_spanletvars.spancount > 0);
|
|
}
|
|
|
|
void R_32DrawSpanletTurbulentBlended( void )
|
|
{
|
|
extern int *r_turb_turb;
|
|
unsigned *btemp;
|
|
int sturb, tturb;
|
|
do
|
|
{
|
|
sturb = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tturb = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = ( (int *)s_spanletvars.pbase + ( sturb ) + ( tturb << 6 ) );
|
|
|
|
if ( *s_spanletvars.pz <= ( s_spanletvars.izi >> 16 ) )
|
|
{
|
|
((qbyte *)s_spanletvars.pdest)[0] = (((qbyte *)s_spanletvars.pdest)[0]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[2]*r_q2polydesc.alpha)/255;
|
|
((qbyte *)s_spanletvars.pdest)[1] = (((qbyte *)s_spanletvars.pdest)[1]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[1]*r_q2polydesc.alpha)/255;
|
|
((qbyte *)s_spanletvars.pdest)[2] = (((qbyte *)s_spanletvars.pdest)[2]*(255-r_q2polydesc.alpha) + ((qbyte *)btemp)[0]*r_q2polydesc.alpha)/255;
|
|
}
|
|
|
|
s_spanletvars.izi += s_spanletvars.izistep;
|
|
s_spanletvars.pdest+=4;
|
|
s_spanletvars.pz++;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
} while ( --s_spanletvars.spancount > 0 );
|
|
}
|
|
|
|
/*
|
|
** R_DrawSpanlet66Stipple
|
|
*/
|
|
void R_DrawSpanlet66Stipple( void )
|
|
{
|
|
unsigned btemp;
|
|
qbyte *pdest = s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
s_spanletvars.pdest += s_spanletvars.spancount;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.v & 1 ) )
|
|
{
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.u & 1 ) )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) );
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = *( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) );
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
|
|
s_spanletvars.spancount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
void R_16DrawSpanlet66Stipple( void )
|
|
{
|
|
unsigned btemp;
|
|
unsigned short *pdest = (unsigned short *)s_spanletvars.pdest;
|
|
short *pz = s_spanletvars.pz;
|
|
int izi = s_spanletvars.izi;
|
|
|
|
s_spanletvars.pdest += s_spanletvars.spancount<<1;
|
|
s_spanletvars.pz += s_spanletvars.spancount;
|
|
|
|
if ( s_spanletvars.spancount == AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.izi += s_spanletvars.izistep << AFFINE_SPANLET_SIZE_BITS;
|
|
else
|
|
s_spanletvars.izi += s_spanletvars.izistep * s_spanletvars.izistep;
|
|
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.v & 1 ) )
|
|
{
|
|
if ( r_q2polydesc.stipple_parity ^ ( s_spanletvars.u & 1 ) )
|
|
{
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
s_spanletvars.spancount--;
|
|
}
|
|
|
|
s_spanletvars.sstep *= 2;
|
|
s_spanletvars.tstep *= 2;
|
|
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = vid.colormap16[*( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) )];
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep_times_2;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest += 2;
|
|
pz += 2;
|
|
|
|
s_spanletvars.spancount -= 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while ( s_spanletvars.spancount > 0 )
|
|
{
|
|
unsigned s = s_spanletvars.s >> 16;
|
|
unsigned t = s_spanletvars.t >> 16;
|
|
|
|
btemp = s+t;//vid.colormap16[*( s_spanletvars.pbase + ( s ) + ( t * cachewidth ) )];
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if ( *pz <= ( izi >> 16 ) )
|
|
*pdest = btemp;
|
|
}
|
|
|
|
izi += s_spanletvars.izistep;
|
|
s_spanletvars.s += s_spanletvars.sstep;
|
|
s_spanletvars.t += s_spanletvars.tstep;
|
|
|
|
pdest++;
|
|
pz++;
|
|
|
|
s_spanletvars.spancount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
** R_PolygonDrawSpans
|
|
*/
|
|
// PGM - iswater was qboolean. changed to allow passing more flags
|
|
void R_PolygonDrawSpans(espan_t *pspan, int iswater )
|
|
{
|
|
extern int *r_turb_turb;
|
|
int count;
|
|
fixed16_t snext, tnext;
|
|
float sdivz, tdivz, zi, z, du, dv, spancountminus1;
|
|
float sdivzspanletstepu, tdivzspanletstepu, zispanletstepu;
|
|
|
|
s_spanletvars.pbase = cacheblock;
|
|
|
|
//PGM
|
|
// if ( iswater & SURF_WARP)
|
|
r_turb_turb = sintable + ((int)(cl.time*SPEED)&(CYCLE-1));
|
|
// else if (iswater & SURF_FLOWING)
|
|
// r_turb_turb = blanktable;
|
|
//PGM
|
|
|
|
sdivzspanletstepu = d_sdivzstepu * AFFINE_SPANLET_SIZE;
|
|
tdivzspanletstepu = d_tdivzstepu * AFFINE_SPANLET_SIZE;
|
|
zispanletstepu = d_zistepu * AFFINE_SPANLET_SIZE;
|
|
|
|
// we count on FP exceptions being turned off to avoid range problems
|
|
s_spanletvars.izistep = (int)(d_zistepu * 0x8000 * 0x10000);
|
|
s_spanletvars.izistep_times_2 = s_spanletvars.izistep * 2;
|
|
|
|
s_spanletvars.pz = 0;
|
|
|
|
do
|
|
{
|
|
s_spanletvars.pdest = (qbyte *)d_viewbuffer + r_pixbytes*( d_scantable[pspan->v] /*r_screenwidth * pspan->v*/ + pspan->u);
|
|
s_spanletvars.pz = d_pzbuffer + (d_zwidth * pspan->v) + pspan->u;
|
|
s_spanletvars.u = pspan->u;
|
|
s_spanletvars.v = pspan->v;
|
|
|
|
count = pspan->count;
|
|
|
|
if (count <= 0)
|
|
goto NextSpan;
|
|
|
|
// calculate the initial s/z, t/z, 1/z, s, and t and clamp
|
|
du = (float)pspan->u;
|
|
dv = (float)pspan->v;
|
|
|
|
sdivz = d_sdivzorigin + dv*d_sdivzstepv + du*d_sdivzstepu;
|
|
tdivz = d_tdivzorigin + dv*d_tdivzstepv + du*d_tdivzstepu;
|
|
|
|
zi = d_ziorigin + dv*d_zistepv + du*d_zistepu;
|
|
z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
|
|
// we count on FP exceptions being turned off to avoid range problems
|
|
s_spanletvars.izi = (int)(zi * 0x8000 * 0x10000);
|
|
|
|
s_spanletvars.s = (int)(sdivz * z) + sadjust;
|
|
s_spanletvars.t = (int)(tdivz * z) + tadjust;
|
|
|
|
if ( !iswater )
|
|
{
|
|
if (s_spanletvars.s > bbextents)
|
|
s_spanletvars.s = bbextents;
|
|
else if (s_spanletvars.s < 0)
|
|
s_spanletvars.s = 0;
|
|
|
|
if (s_spanletvars.t > bbextentt)
|
|
s_spanletvars.t = bbextentt;
|
|
else if (s_spanletvars.t < 0)
|
|
s_spanletvars.t = 0;
|
|
}
|
|
|
|
do
|
|
{
|
|
// calculate s and t at the far end of the span
|
|
if (count >= AFFINE_SPANLET_SIZE )
|
|
s_spanletvars.spancount = AFFINE_SPANLET_SIZE;
|
|
else
|
|
s_spanletvars.spancount = count;
|
|
|
|
count -= s_spanletvars.spancount;
|
|
|
|
if (count)
|
|
{
|
|
// calculate s/z, t/z, zi->fixed s and t at far end of span,
|
|
// calculate s and t steps across span by shifting
|
|
sdivz += sdivzspanletstepu;
|
|
tdivz += tdivzspanletstepu;
|
|
zi += zispanletstepu;
|
|
z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
|
|
|
|
snext = (int)(sdivz * z) + sadjust;
|
|
tnext = (int)(tdivz * z) + tadjust;
|
|
|
|
if ( !iswater )
|
|
{
|
|
if (snext > bbextents)
|
|
snext = bbextents;
|
|
else if (snext < AFFINE_SPANLET_SIZE)
|
|
snext = AFFINE_SPANLET_SIZE; // prevent round-off error on <0 steps from
|
|
// from causing overstepping & running off the
|
|
// edge of the texture
|
|
|
|
if (tnext > bbextentt)
|
|
tnext = bbextentt;
|
|
else if (tnext < AFFINE_SPANLET_SIZE)
|
|
tnext = AFFINE_SPANLET_SIZE; // guard against round-off error on <0 steps
|
|
}
|
|
|
|
s_spanletvars.sstep = (snext - s_spanletvars.s) >> AFFINE_SPANLET_SIZE_BITS;
|
|
s_spanletvars.tstep = (tnext - s_spanletvars.t) >> AFFINE_SPANLET_SIZE_BITS;
|
|
}
|
|
else
|
|
{
|
|
// calculate s/z, t/z, zi->fixed s and t at last pixel in span (so
|
|
// can't step off polygon), clamp, calculate s and t steps across
|
|
// span by division, biasing steps low so we don't run off the
|
|
// texture
|
|
spancountminus1 = (float)(s_spanletvars.spancount - 1);
|
|
sdivz += d_sdivzstepu * spancountminus1;
|
|
tdivz += d_tdivzstepu * spancountminus1;
|
|
zi += d_zistepu * spancountminus1;
|
|
z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
|
|
snext = (int)(sdivz * z) + sadjust;
|
|
tnext = (int)(tdivz * z) + tadjust;
|
|
|
|
if ( !iswater )
|
|
{
|
|
if (snext > bbextents)
|
|
snext = bbextents;
|
|
else if (snext < AFFINE_SPANLET_SIZE)
|
|
snext = AFFINE_SPANLET_SIZE; // prevent round-off error on <0 steps from
|
|
// from causing overstepping & running off the
|
|
// edge of the texture
|
|
|
|
if (tnext > bbextentt)
|
|
tnext = bbextentt;
|
|
else if (tnext < AFFINE_SPANLET_SIZE)
|
|
tnext = AFFINE_SPANLET_SIZE; // guard against round-off error on <0 steps
|
|
}
|
|
|
|
if (s_spanletvars.spancount > 1)
|
|
{
|
|
s_spanletvars.sstep = (snext - s_spanletvars.s) / (s_spanletvars.spancount - 1);
|
|
s_spanletvars.tstep = (tnext - s_spanletvars.t) / (s_spanletvars.spancount - 1);
|
|
}
|
|
}
|
|
|
|
if ( iswater )
|
|
{
|
|
s_spanletvars.s = s_spanletvars.s & ((CYCLE<<16)-1);
|
|
s_spanletvars.t = s_spanletvars.t & ((CYCLE<<16)-1);
|
|
}
|
|
|
|
r_q2polydesc.drawspanlet();
|
|
|
|
s_spanletvars.s = snext;
|
|
s_spanletvars.t = tnext;
|
|
|
|
} while (count > 0);
|
|
|
|
NextSpan:
|
|
pspan++;
|
|
|
|
} while (pspan->count != DS_SPAN_LIST_END);
|
|
}
|
|
|
|
/*
|
|
**
|
|
** R_PolygonScanLeftEdge
|
|
**
|
|
** Goes through the polygon and scans the left edge, filling in
|
|
** screen coordinate data for the spans
|
|
*/
|
|
void R_PolygonScanLeftEdge (void)
|
|
{
|
|
int i, v, itop, ibottom, lmaxindex;
|
|
emitpoint_t *pvert, *pnext;
|
|
espan_t *pspan;
|
|
float du, dv, vtop, vbottom, slope;
|
|
fixed16_t u, u_step;
|
|
|
|
pspan = s_polygon_spans;
|
|
i = s_minindex;
|
|
if (i == 0)
|
|
i = r_q2polydesc.nump;
|
|
|
|
lmaxindex = s_maxindex;
|
|
if (lmaxindex == 0)
|
|
lmaxindex = r_q2polydesc.nump;
|
|
|
|
vtop = ceil (r_q2polydesc.pverts[i].v);
|
|
|
|
do
|
|
{
|
|
pvert = &r_q2polydesc.pverts[i];
|
|
pnext = pvert - 1;
|
|
|
|
vbottom = ceil (pnext->v);
|
|
|
|
if (vtop < vbottom)
|
|
{
|
|
du = pnext->u - pvert->u;
|
|
dv = pnext->v - pvert->v;
|
|
|
|
slope = du / dv;
|
|
u_step = (int)(slope * 0x10000);
|
|
// adjust u to ceil the integer portion
|
|
u = (int)((pvert->u + (slope * (vtop - pvert->v))) * 0x10000) +
|
|
(0x10000 - 1);
|
|
itop = (int)vtop;
|
|
ibottom = (int)vbottom;
|
|
|
|
for (v=itop ; v<ibottom ; v++)
|
|
{
|
|
pspan->u = u >> 16;
|
|
pspan->v = v;
|
|
u += u_step;
|
|
pspan++;
|
|
}
|
|
}
|
|
|
|
vtop = vbottom;
|
|
|
|
i--;
|
|
if (i == 0)
|
|
i = r_q2polydesc.nump;
|
|
|
|
} while (i != lmaxindex);
|
|
}
|
|
|
|
/*
|
|
** R_PolygonScanRightEdge
|
|
**
|
|
** Goes through the polygon and scans the right edge, filling in
|
|
** count values.
|
|
*/
|
|
void R_PolygonScanRightEdge (void)
|
|
{
|
|
int i, v, itop, ibottom;
|
|
emitpoint_t *pvert, *pnext;
|
|
espan_t *pspan;
|
|
float du, dv, vtop, vbottom, slope, uvert, unext, vvert, vnext;
|
|
fixed16_t u, u_step;
|
|
|
|
pspan = s_polygon_spans;
|
|
i = s_minindex;
|
|
|
|
vvert = r_q2polydesc.pverts[i].v;
|
|
if (vvert < r_refdef.fvrecty_adj)
|
|
vvert = r_refdef.fvrecty_adj;
|
|
if (vvert > r_refdef.fvrectbottom_adj)
|
|
vvert = r_refdef.fvrectbottom_adj;
|
|
|
|
vtop = ceil (vvert);
|
|
|
|
do
|
|
{
|
|
pvert = &r_q2polydesc.pverts[i];
|
|
pnext = pvert + 1;
|
|
|
|
vnext = pnext->v;
|
|
if (vnext < r_refdef.fvrecty_adj)
|
|
vnext = r_refdef.fvrecty_adj;
|
|
if (vnext > r_refdef.fvrectbottom_adj)
|
|
vnext = r_refdef.fvrectbottom_adj;
|
|
|
|
vbottom = ceil (vnext);
|
|
|
|
if (vtop < vbottom)
|
|
{
|
|
uvert = pvert->u;
|
|
if (uvert < r_refdef.fvrectx_adj)
|
|
uvert = r_refdef.fvrectx_adj;
|
|
if (uvert > r_refdef.fvrectright_adj)
|
|
uvert = r_refdef.fvrectright_adj;
|
|
|
|
unext = pnext->u;
|
|
if (unext < r_refdef.fvrectx_adj)
|
|
unext = r_refdef.fvrectx_adj;
|
|
if (unext > r_refdef.fvrectright_adj)
|
|
unext = r_refdef.fvrectright_adj;
|
|
|
|
du = unext - uvert;
|
|
dv = vnext - vvert;
|
|
slope = du / dv;
|
|
u_step = (int)(slope * 0x10000);
|
|
// adjust u to ceil the integer portion
|
|
u = (int)((uvert + (slope * (vtop - vvert))) * 0x10000) +
|
|
(0x10000 - 1);
|
|
itop = (int)vtop;
|
|
ibottom = (int)vbottom;
|
|
|
|
for (v=itop ; v<ibottom ; v++)
|
|
{
|
|
pspan->count = (u >> 16) - pspan->u;
|
|
u += u_step;
|
|
pspan++;
|
|
}
|
|
}
|
|
|
|
vtop = vbottom;
|
|
vvert = vnext;
|
|
|
|
i++;
|
|
if (i == r_q2polydesc.nump)
|
|
i = 0;
|
|
|
|
} while (i != s_maxindex);
|
|
|
|
pspan->count = DS_SPAN_LIST_END; // mark the end of the span list
|
|
}
|
|
|
|
/*
|
|
** R_ClipPolyFace
|
|
**
|
|
** Clips the winding at clip_verts[clip_current] and changes clip_current
|
|
** Throws out the back side
|
|
*/
|
|
int R_ClipPolyFace (int nump, clipplane_t *pclipplane)
|
|
{
|
|
int i, outcount;
|
|
float dists[MAXWORKINGVERTS+3];
|
|
float frac, clipdist, *pclipnormal;
|
|
float *in, *instep, *outstep, *vert2;
|
|
|
|
clipdist = pclipplane->dist;
|
|
pclipnormal = pclipplane->normal;
|
|
|
|
// calc dists
|
|
if (clip_current)
|
|
{
|
|
in = r_clip_verts[1][0];
|
|
outstep = r_clip_verts[0][0];
|
|
clip_current = 0;
|
|
}
|
|
else
|
|
{
|
|
in = r_clip_verts[0][0];
|
|
outstep = r_clip_verts[1][0];
|
|
clip_current = 1;
|
|
}
|
|
|
|
instep = in;
|
|
for (i=0 ; i<nump ; i++, instep += sizeof (vec5_t) / sizeof (float))
|
|
{
|
|
dists[i] = DotProduct (instep, pclipnormal) - clipdist;
|
|
}
|
|
|
|
// handle wraparound case
|
|
dists[nump] = dists[0];
|
|
memcpy (instep, in, sizeof (vec5_t));
|
|
|
|
|
|
// clip the winding
|
|
instep = in;
|
|
outcount = 0;
|
|
|
|
for (i=0 ; i<nump ; i++, instep += sizeof (vec5_t) / sizeof (float))
|
|
{
|
|
if (dists[i] >= 0)
|
|
{
|
|
memcpy (outstep, instep, sizeof (vec5_t));
|
|
outstep += sizeof (vec5_t) / sizeof (float);
|
|
outcount++;
|
|
}
|
|
|
|
if (dists[i] == 0 || dists[i+1] == 0)
|
|
continue;
|
|
|
|
if ( (dists[i] > 0) == (dists[i+1] > 0) )
|
|
continue;
|
|
|
|
// split it into a new vertex
|
|
frac = dists[i] / (dists[i] - dists[i+1]);
|
|
|
|
vert2 = instep + sizeof (vec5_t) / sizeof (float);
|
|
|
|
outstep[0] = instep[0] + frac*(vert2[0] - instep[0]);
|
|
outstep[1] = instep[1] + frac*(vert2[1] - instep[1]);
|
|
outstep[2] = instep[2] + frac*(vert2[2] - instep[2]);
|
|
outstep[3] = instep[3] + frac*(vert2[3] - instep[3]);
|
|
outstep[4] = instep[4] + frac*(vert2[4] - instep[4]);
|
|
|
|
outstep += sizeof (vec5_t) / sizeof (float);
|
|
outcount++;
|
|
}
|
|
|
|
return outcount;
|
|
}
|
|
|
|
void R_PolygonCalculateGradients (void)
|
|
{
|
|
vec3_t p_normal, p_saxis, p_taxis;
|
|
float distinv;
|
|
|
|
TransformVector (r_q2polydesc.vpn, p_normal);
|
|
TransformVector (r_q2polydesc.vright, p_saxis);
|
|
TransformVector (r_q2polydesc.vup, p_taxis);
|
|
|
|
distinv = 1.0 / (-(DotProduct (r_q2polydesc.viewer_position, r_q2polydesc.vpn)) + r_q2polydesc.dist );
|
|
|
|
d_sdivzstepu = p_saxis[0] * xscaleinv;
|
|
d_sdivzstepv = -p_saxis[1] * yscaleinv;
|
|
d_sdivzorigin = p_saxis[2] - xcenter * d_sdivzstepu - ycenter * d_sdivzstepv;
|
|
|
|
d_tdivzstepu = p_taxis[0] * xscaleinv;
|
|
d_tdivzstepv = -p_taxis[1] * yscaleinv;
|
|
d_tdivzorigin = p_taxis[2] - xcenter * d_tdivzstepu - ycenter * d_tdivzstepv;
|
|
|
|
d_zistepu = p_normal[0] * xscaleinv * distinv;
|
|
d_zistepv = -p_normal[1] * yscaleinv * distinv;
|
|
d_ziorigin = p_normal[2] * distinv - xcenter * d_zistepu - ycenter * d_zistepv;
|
|
|
|
sadjust = (fixed16_t) ( ( DotProduct( r_q2polydesc.viewer_position, r_q2polydesc.vright) + r_q2polydesc.s_offset ) * 0x10000 );
|
|
tadjust = (fixed16_t) ( ( DotProduct( r_q2polydesc.viewer_position, r_q2polydesc.vup ) + r_q2polydesc.t_offset ) * 0x10000 );
|
|
|
|
// -1 (-epsilon) so we never wander off the edge of the texture
|
|
bbextents = (r_q2polydesc.pixel_width << 16) - 1;
|
|
bbextentt = (r_q2polydesc.pixel_height << 16) - 1;
|
|
}
|
|
|
|
static void R_DrawPoly( int iswater )
|
|
{
|
|
int i, nump;
|
|
float ymin, ymax;
|
|
emitpoint_t *pverts;
|
|
espan_t spans[MAXHEIGHT+1];
|
|
|
|
s_polygon_spans = spans;
|
|
|
|
// find the top and bottom vertices, and make sure there's at least one scan to
|
|
// draw
|
|
ymin = 999999.9;
|
|
ymax = -999999.9;
|
|
pverts = r_q2polydesc.pverts;
|
|
|
|
for (i=0 ; i<r_q2polydesc.nump ; i++)
|
|
{
|
|
if (pverts->v < ymin)
|
|
{
|
|
ymin = pverts->v;
|
|
s_minindex = i;
|
|
}
|
|
|
|
if (pverts->v > ymax)
|
|
{
|
|
ymax = pverts->v;
|
|
s_maxindex = i;
|
|
}
|
|
|
|
pverts++;
|
|
}
|
|
|
|
ymin = ceil (ymin);
|
|
ymax = ceil (ymax);
|
|
|
|
if (ymin >= ymax)
|
|
return; // doesn't cross any scans at all
|
|
|
|
cachewidth = r_q2polydesc.pixel_width;
|
|
cacheblock = r_q2polydesc.pixels;
|
|
|
|
// copy the first vertex to the last vertex, so we don't have to deal with
|
|
// wrapping
|
|
nump = r_q2polydesc.nump;
|
|
pverts = r_q2polydesc.pverts;
|
|
pverts[nump] = pverts[0];
|
|
|
|
R_PolygonCalculateGradients ();
|
|
R_PolygonScanLeftEdge ();
|
|
R_PolygonScanRightEdge ();
|
|
|
|
R_PolygonDrawSpans( s_polygon_spans, iswater );
|
|
}
|
|
|
|
|
|
void R_ClipAndDrawPoly ( float alpha, int isturbulent, qboolean textured )
|
|
{
|
|
emitpoint_t outverts[MAXWORKINGVERTS+3], *pout;
|
|
float *pv;
|
|
int i, nump;
|
|
float scale;
|
|
vec3_t transformed, local;
|
|
|
|
if (r_pixbytes == 4)
|
|
{
|
|
if (alpha == 1 && !isturbulent)
|
|
r_q2polydesc.drawspanlet = R_32DrawSpanletAlphaTest;
|
|
else
|
|
{
|
|
r_q2polydesc.alpha = alpha*255;
|
|
if (isturbulent)
|
|
r_q2polydesc.drawspanlet = R_32DrawSpanletTurbulentBlended;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_32DrawSpanletBlended;
|
|
}
|
|
}
|
|
else if (r_pixbytes == 2)
|
|
{
|
|
if (alpha < 0.5)
|
|
r_q2polydesc.drawspanlet = R_16DrawSpanlet33Stipple;
|
|
else if (alpha < 0.9)
|
|
r_q2polydesc.drawspanlet = R_16DrawSpanlet66Stipple;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_16DrawSpanletAlphaTest;
|
|
}
|
|
else
|
|
{
|
|
if (alpha < 0.5)
|
|
r_q2polydesc.drawspanlet = R_DrawSpanlet33Stipple;
|
|
else if (alpha < 0.9)
|
|
r_q2polydesc.drawspanlet = R_DrawSpanlet66Stipple;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_8DrawSpanletAlphaTest;
|
|
/*
|
|
if ( !textured )
|
|
{
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanletConstant33;
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// choose the correct spanlet routine based on alpha
|
|
//
|
|
if ( alpha == 1 )
|
|
{
|
|
// isturbulent is ignored because we know that turbulent surfaces
|
|
// can't be opaque
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanletOpaque;
|
|
}
|
|
else
|
|
{
|
|
if (1)// sw_stipplealpha->value )
|
|
{
|
|
if ( isturbulent )
|
|
{
|
|
if ( alpha > 0.33 )
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletTurbulentStipple66;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletTurbulentStipple33;
|
|
}
|
|
else if (1)
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletAlphaTest;
|
|
else
|
|
{
|
|
if ( alpha > 0.33 )
|
|
r_q2polydesc.drawspanlet = R_DrawSpanlet66Stipple;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_DrawSpanlet33Stipple;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ( isturbulent )
|
|
{
|
|
if ( alpha > 0.33 )
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanletTurbulentBlended66;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanletTurbulentBlended33;
|
|
}
|
|
else
|
|
{
|
|
if ( alpha > 0.33 )
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanlet66;
|
|
else
|
|
r_q2polydesc.drawspanlet = R_DrawSpanletConstant;//R_DrawSpanlet33;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
}
|
|
|
|
// clip to the frustum in worldspace
|
|
nump = r_q2polydesc.nump;
|
|
clip_current = 0;
|
|
|
|
for (i=0 ; i<4 ; i++)
|
|
{
|
|
nump = R_ClipPolyFace (nump, &view_clipplanes[i]);
|
|
if (nump < 3)
|
|
return;
|
|
if (nump > MAXWORKINGVERTS)
|
|
Host_Error("R_ClipAndDrawPoly: too many points: %d", nump );
|
|
}
|
|
|
|
// transform vertices into viewspace and project
|
|
pv = &r_clip_verts[clip_current][0][0];
|
|
|
|
for (i=0 ; i<nump ; i++)
|
|
{
|
|
VectorSubtract (pv, r_origin, local);
|
|
TransformVector (local, transformed);
|
|
|
|
if (transformed[2] < NEAR_CLIP)
|
|
transformed[2] = NEAR_CLIP;
|
|
|
|
pout = &outverts[i];
|
|
pout->zi = 1.0 / transformed[2];
|
|
|
|
pout->s = pv[3];
|
|
pout->t = pv[4];
|
|
|
|
scale = xscale * pout->zi;
|
|
pout->u = (xcenter+0.5 + scale * transformed[0]);
|
|
|
|
scale = yscale * pout->zi;
|
|
pout->v = (ycenter - scale * transformed[1]);
|
|
|
|
pv += sizeof (vec5_t) / sizeof (pv);
|
|
}
|
|
|
|
// draw it
|
|
r_q2polydesc.nump = nump;
|
|
r_q2polydesc.pverts = outverts;
|
|
|
|
R_DrawPoly( isturbulent );
|
|
}
|
|
|
|
|
|
void R_BuildPolygonFromSurface(msurface_t *fa)
|
|
{
|
|
int i, lindex, lnumverts;
|
|
medge_t *pedges, *r_pedge;
|
|
int vertpage;
|
|
float *vec;
|
|
vec5_t *pverts;
|
|
float tmins[2] = { 0, 0 };
|
|
|
|
r_q2polydesc.nump = 0;
|
|
|
|
// reconstruct the polygon
|
|
pedges = currentmodel->edges;
|
|
lnumverts = fa->numedges;
|
|
vertpage = 0;
|
|
|
|
pverts = r_clip_verts[0];
|
|
|
|
for (i=0 ; i<lnumverts ; i++)
|
|
{
|
|
lindex = currentmodel->surfedges[fa->firstedge + i];
|
|
|
|
if (lindex > 0)
|
|
{
|
|
r_pedge = &pedges[lindex];
|
|
vec = currentmodel->vertexes[r_pedge->v[0]].position;
|
|
}
|
|
else
|
|
{
|
|
r_pedge = &pedges[-lindex];
|
|
vec = currentmodel->vertexes[r_pedge->v[1]].position;
|
|
}
|
|
|
|
VectorCopy (vec, pverts[i] );
|
|
}
|
|
|
|
VectorCopy( fa->texinfo->vecs[0], r_q2polydesc.vright );
|
|
VectorCopy( fa->texinfo->vecs[1], r_q2polydesc.vup );
|
|
VectorCopy( fa->plane->normal, r_q2polydesc.vpn );
|
|
VectorCopy( r_origin, r_q2polydesc.viewer_position );
|
|
|
|
if ( fa->flags & SURF_PLANEBACK )
|
|
{
|
|
VectorSubtract( vec3_origin, r_q2polydesc.vpn, r_q2polydesc.vpn );
|
|
}
|
|
|
|
// PGM 09/16/98
|
|
if ( fa->texinfo->flags & (SURF_WARP|SURF_FLOWING) )
|
|
{
|
|
r_q2polydesc.pixels = (qbyte *)fa->texinfo->texture + fa->texinfo->texture->offsets[0];
|
|
r_q2polydesc.pixel_width = fa->texinfo->texture->width;
|
|
r_q2polydesc.pixel_height = fa->texinfo->texture->height;
|
|
}
|
|
// PGM 09/16/98
|
|
else
|
|
{
|
|
surfcache_t *scache;
|
|
|
|
scache = D_CacheSurface( fa, 0 );
|
|
|
|
r_q2polydesc.pixels = scache->data;
|
|
r_q2polydesc.pixel_width = scache->width;
|
|
r_q2polydesc.pixel_height = scache->height;
|
|
|
|
tmins[0] = fa->texturemins[0];
|
|
tmins[1] = fa->texturemins[1];
|
|
}
|
|
|
|
r_q2polydesc.dist = DotProduct( r_q2polydesc.vpn, pverts[0] );
|
|
|
|
r_q2polydesc.s_offset = fa->texinfo->vecs[0][3] - tmins[0];
|
|
r_q2polydesc.t_offset = fa->texinfo->vecs[1][3] - tmins[1];
|
|
|
|
// scrolling texture addition
|
|
if (fa->texinfo->flags & SURF_FLOWING)
|
|
{
|
|
r_q2polydesc.s_offset += -128 * ( (cl.time*0.25) - (int)(cl.time*0.25) );
|
|
}
|
|
|
|
r_q2polydesc.nump = lnumverts;
|
|
}
|
|
|
|
|
|
|
|
void SWR_DrawAlphaSurfaces( void )
|
|
{
|
|
msurface_t *s = r_alpha_surfaces, *os;
|
|
|
|
currentmodel = r_worldentity.model;
|
|
|
|
modelorg[0] = -r_origin[0];
|
|
modelorg[1] = -r_origin[1];
|
|
modelorg[2] = -r_origin[2];
|
|
|
|
while ( s )
|
|
{
|
|
R_BuildPolygonFromSurface( s );
|
|
|
|
if (s->texinfo->flags & SURF_TRANS66)
|
|
{
|
|
R_ClipAndDrawPoly( 0.66f, 0/*(s->texinfo->flags & (SURF_WARP|SURF_FLOWING))*/, true );
|
|
}
|
|
else if (s->texinfo->flags & SURF_TRANS33)
|
|
{
|
|
R_ClipAndDrawPoly( 0.33f, 0/*(s->texinfo->flags & (SURF_WARP|SURF_FLOWING))*/, true );
|
|
}
|
|
else
|
|
R_ClipAndDrawPoly( 1.f, 0/*(s->texinfo->flags & (SURF_WARP|SURF_FLOWING))*/, true );
|
|
|
|
os = s;
|
|
s = s->nextalphasurface;
|
|
os->nextalphasurface=NULL;
|
|
}
|
|
|
|
r_alpha_surfaces = NULL;
|
|
}
|