mirror of
https://github.com/nzp-team/fteqw.git
synced 2024-11-23 04:11:53 +00:00
6e3f69f504
fte particle scripts are disabled (classic works). I'll fix these in the new year. Redid framestate stuff again. Slightly better now, but this is the bulk of the changes here. Reworked the renderqueue to provide batches of items instead of individual items. This cleans up the particle rendering code significantly, and is a step towards multiple concurrent particle systems. fte's scripted particles are broken as I'm trying to find a way to rework them to batch types together, rather than having to restart each batch after each particle when you have two particles in a trail. I'll fix it some time. Reworked some alias model code regarding skeletal models. Added some conceptual skeletal bone control builtins available to csqc. Currently it can query the bone names and save off animation states, but can't animate - its just not complete. Added more info to glsl custom shaders. Updated surface sorting on halflife maps to properly cope with alphaed entities, rather than just texture-based blends (q2-style). git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@3095 fc73d0e0-1445-4013-8a0c-d673dee63da5
2320 lines
52 KiB
C
2320 lines
52 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[64];
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/*
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================
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R_LoadSkyBox
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================
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*/
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void SWR_LoadSkyBox (void)
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{
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#ifdef Q2BSPS
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void *Mod_LoadWall(char *name);
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int i;
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char pathname[MAX_QPATH];
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for (i=0 ; i<6 ; i++)
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{
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snprintf (pathname, MAX_QPATH-1, "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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snprintf (pathname, MAX_QPATH-1, "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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if (!r_skytexinfo[i].texture)
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{
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// break out and erase skyname so renderer won't render it
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skyname[0] = '\0';
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return;
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}
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}
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#endif
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}
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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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SWR_LoadSkyBox();
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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 (!COM_FCheckExists(pathname))
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return false;
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// if (!CL_CheckOrDownloadFile(pathname, NULL, -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 R_InitSkyBox (void)
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{
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int i;
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model_t *wm;
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wm = cl.worldmodel;
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if (wm->numsurfaces+6 > MAX_MAP_FACES
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|| wm->numvertexes+8 > MAX_MAP_VERTS
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|| wm->numedges+12 > MAX_MAP_EDGES)
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Host_Error ("InitSkyBox: map overflow");
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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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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+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 - 1 + box_surfedges[i];
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else
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r_skysurfedges[i] = -(wm->numedges - 1 + -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-1+box_edges[i*2+0];
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r_skyedges[i].v[1] = wm->numvertexes-1+box_edges[i*2+1];
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r_skyedges[i].cachededgeoffset = 0;
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}
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Hunk_Check();
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}
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void SWR_Skyboxname_Callback(struct cvar_s *var, char *oldvalue)
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{
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Q_strncpyz (skyname, var->string, sizeof(skyname));
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SWR_LoadSkyBox();
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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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}
|
|
|
|
|
|
/*
|
|
================
|
|
R_ClipEdge
|
|
================
|
|
*/
|
|
void R_ClipEdge (mvertex_t *pv0, mvertex_t *pv1, clipplane_t *clip)
|
|
{
|
|
float d0, d1, f;
|
|
mvertex_t clipvert;
|
|
|
|
if (clip)
|
|
{
|
|
do
|
|
{
|
|
d0 = DotProduct (pv0->position, clip->normal) - clip->dist;
|
|
d1 = DotProduct (pv1->position, clip->normal) - clip->dist;
|
|
|
|
if (d0 >= 0)
|
|
{
|
|
// point 0 is unclipped
|
|
if (d1 >= 0)
|
|
{
|
|
// both points are unclipped
|
|
continue;
|
|
}
|
|
|
|
// only point 1 is clipped
|
|
|
|
// we don't cache 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_leftexit = clipvert;
|
|
}
|
|
else if (clip->rightedge)
|
|
{
|
|
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)
|
|
{
|
|
extern float r_wateralphaval;
|
|
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->flags & (SURF_ALPHATEST|SURF_TRANS33|SURF_TRANS66)))
|
|
{
|
|
if (fa->nextalphasurface)
|
|
return;
|
|
|
|
fa->nextalphasurface = r_alpha_surfaces;
|
|
r_alpha_surfaces = fa;
|
|
return;
|
|
}
|
|
|
|
if (r_wateralphaval != 1.0 && fa->flags & SURF_DRAWTURB)
|
|
{
|
|
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->flags & (SURF_TRANS33|SURF_TRANS66|SURF_ALPHATEST))
|
|
{
|
|
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_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);
|
|
}
|
|
|
|
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_8DrawSpanletAlphaBlend( void ) //8 bit rendering only
|
|
{
|
|
unsigned btemp;
|
|
|
|
D_SetTransLevel(r_q2polydesc.alpha/255.0, BM_BLEND);
|
|
|
|
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 = Trans(*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_8DrawSpanletTurbulentAlphaBlend( void )
|
|
{
|
|
extern int *r_turb_turb;
|
|
unsigned btemp;
|
|
|
|
D_SetTransLevel(r_q2polydesc.alpha/255.0, BM_BLEND);
|
|
|
|
do
|
|
{
|
|
unsigned ts, tt;
|
|
|
|
ts = ((s_spanletvars.s + r_turb_turb[(s_spanletvars.t>>16)&(CYCLE-1)])>>16)&63;
|
|
tt = ((s_spanletvars.t + r_turb_turb[(s_spanletvars.s>>16)&(CYCLE-1)])>>16)&63;
|
|
|
|
btemp = *(s_spanletvars.pbase + (ts) + (tt) * cachewidth);
|
|
|
|
if ( btemp != 255 )
|
|
{
|
|
if (*s_spanletvars.pz <= (s_spanletvars.izi >> 16))
|
|
{
|
|
*s_spanletvars.pdest = Trans(*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_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_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 if (alpha <= 0)
|
|
return;
|
|
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 < 0.2)
|
|
return;
|
|
else 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 >= TRANS_UPPER_CAP)
|
|
r_q2polydesc.drawspanlet = R_8DrawSpanletAlphaTest;
|
|
else if (alpha <= TRANS_LOWER_CAP)
|
|
return;
|
|
else if (isturbulent)
|
|
{
|
|
r_q2polydesc.alpha = alpha*255;
|
|
r_q2polydesc.drawspanlet = R_8DrawSpanletTurbulentAlphaBlend;
|
|
}
|
|
else
|
|
{
|
|
r_q2polydesc.alpha = alpha*255;
|
|
r_q2polydesc.drawspanlet = R_8DrawSpanletAlphaBlend;
|
|
}
|
|
}
|
|
|
|
// 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 )
|
|
{
|
|
VectorNegate( r_q2polydesc.vpn, r_q2polydesc.vpn );
|
|
}
|
|
|
|
// PGM 09/16/98
|
|
if ( fa->texinfo->flags & (SURF_WARP|SURF_FLOWING) || (fa->flags & SURF_DRAWTURB) )
|
|
{
|
|
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->flags & SURF_DRAWTURB)
|
|
{
|
|
extern float r_wateralphaval;
|
|
R_ClipAndDrawPoly( r_wateralphaval, true, true );
|
|
}
|
|
else if (s->texinfo->flags & SURF_TRANS66)
|
|
{
|
|
R_ClipAndDrawPoly( 0.66f, (s->texinfo->flags & (SURF_WARP|SURF_FLOWING)), true );
|
|
}
|
|
else if (s->texinfo->flags & SURF_TRANS33)
|
|
{
|
|
R_ClipAndDrawPoly( 0.33f, (s->texinfo->flags & (SURF_WARP|SURF_FLOWING)), true );
|
|
}
|
|
else
|
|
R_ClipAndDrawPoly( 1.f, (s->texinfo->flags & (SURF_WARP|SURF_FLOWING)), true );
|
|
|
|
os = s;
|
|
s = s->nextalphasurface;
|
|
os->nextalphasurface=NULL;
|
|
}
|
|
|
|
r_alpha_surfaces = NULL;
|
|
}
|