mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-10 14:42:06 +00:00
c3f5581b0a
Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
908 lines
20 KiB
C
908 lines
20 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[SIN_BUFFER_SIZE];
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int intsintable[SIN_BUFFER_SIZE];
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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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#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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{
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r_rightclipped = true;
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r_rightexit = clipvert;
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}
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R_ClipEdge (pv0, &clipvert, clip->next);
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return;
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}
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else
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{
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// point 0 is clipped
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if (d1 < 0)
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{
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// both points are clipped
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// we do cache fully clipped edges
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if (!r_leftclipped)
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cacheoffset = FULLY_CLIPPED_CACHED |
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(r_framecount & FRAMECOUNT_MASK);
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return;
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}
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// only point 0 is clipped
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r_lastvertvalid = false;
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// we don't cache partially 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_leftenter = clipvert;
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}
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else if (clip->rightedge)
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{
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r_rightclipped = true;
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r_rightenter = clipvert;
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}
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R_ClipEdge (&clipvert, pv1, clip->next);
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return;
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}
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} while ((clip = clip->next) != NULL);
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}
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// add the edge
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R_EmitEdge (pv0, pv1);
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}
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#endif // !id386
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/*
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================
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R_EmitCachedEdge
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================
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*/
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void R_EmitCachedEdge (void)
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{
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edge_t *pedge_t;
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pedge_t = (edge_t *)((unsigned long)r_edges + r_pedge->cachededgeoffset);
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if (!pedge_t->surfs[0])
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pedge_t->surfs[0] = surface_p - surfaces;
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else
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pedge_t->surfs[1] = surface_p - surfaces;
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if (pedge_t->nearzi > r_nearzi) // for mipmap finding
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r_nearzi = pedge_t->nearzi;
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r_emitted = 1;
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}
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/*
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================
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R_RenderFace
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================
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*/
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void R_RenderFace (msurface_t *fa, int clipflags)
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{
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int i, lindex;
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unsigned mask;
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mplane_t *pplane;
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float distinv;
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vec3_t p_normal;
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medge_t *pedges, tedge;
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clipplane_t *pclip;
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// skip out if no more surfs
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if ((surface_p) >= surf_max)
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{
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r_outofsurfaces++;
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return;
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}
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// ditto if not enough edges left, or switch to auxedges if possible
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if ((edge_p + fa->numedges + 4) >= edge_max)
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{
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r_outofedges += fa->numedges;
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return;
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}
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c_faceclip++;
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// set up clip planes
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pclip = NULL;
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for (i=3, mask = 0x08 ; i>=0 ; i--, mask >>= 1)
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{
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if (clipflags & mask)
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{
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view_clipplanes[i].next = pclip;
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pclip = &view_clipplanes[i];
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}
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}
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// push the edges through
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r_emitted = 0;
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r_nearzi = 0;
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r_nearzionly = false;
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makeleftedge = makerightedge = false;
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pedges = currententity->model->edges;
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r_lastvertvalid = false;
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for (i=0 ; i<fa->numedges ; i++)
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{
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lindex = currententity->model->surfedges[fa->firstedge + i];
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if (lindex > 0)
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{
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r_pedge = &pedges[lindex];
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// if the edge is cached, we can just reuse the edge
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if (!insubmodel)
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{
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if (r_pedge->cachededgeoffset & FULLY_CLIPPED_CACHED)
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{
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if ((r_pedge->cachededgeoffset & FRAMECOUNT_MASK) ==
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r_framecount)
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{
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r_lastvertvalid = false;
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continue;
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}
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}
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else
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{
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if ((((unsigned long)edge_p - (unsigned long)r_edges) >
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r_pedge->cachededgeoffset) &&
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(((edge_t *)((unsigned long)r_edges +
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r_pedge->cachededgeoffset))->owner == r_pedge))
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{
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R_EmitCachedEdge ();
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r_lastvertvalid = false;
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continue;
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}
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}
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}
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// assume it's cacheable
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cacheoffset = (byte *)edge_p - (byte *)r_edges;
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r_leftclipped = r_rightclipped = false;
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R_ClipEdge (&r_pcurrentvertbase[r_pedge->v[0]],
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&r_pcurrentvertbase[r_pedge->v[1]],
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pclip);
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r_pedge->cachededgeoffset = cacheoffset;
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if (r_leftclipped)
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makeleftedge = true;
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if (r_rightclipped)
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makerightedge = true;
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r_lastvertvalid = true;
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}
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else
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{
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lindex = -lindex;
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r_pedge = &pedges[lindex];
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// if the edge is cached, we can just reuse the edge
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if (!insubmodel)
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{
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if (r_pedge->cachededgeoffset & FULLY_CLIPPED_CACHED)
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{
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if ((r_pedge->cachededgeoffset & FRAMECOUNT_MASK) ==
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r_framecount)
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{
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r_lastvertvalid = false;
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continue;
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}
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}
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else
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{
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// it's cached if the cached edge is valid and is owned
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// by this medge_t
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if ((((unsigned long)edge_p - (unsigned long)r_edges) >
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r_pedge->cachededgeoffset) &&
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(((edge_t *)((unsigned long)r_edges +
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r_pedge->cachededgeoffset))->owner == r_pedge))
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{
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R_EmitCachedEdge ();
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r_lastvertvalid = false;
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continue;
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}
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}
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}
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// assume it's cacheable
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cacheoffset = (byte *)edge_p - (byte *)r_edges;
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r_leftclipped = r_rightclipped = false;
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R_ClipEdge (&r_pcurrentvertbase[r_pedge->v[1]],
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&r_pcurrentvertbase[r_pedge->v[0]],
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pclip);
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r_pedge->cachededgeoffset = cacheoffset;
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if (r_leftclipped)
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makeleftedge = true;
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if (r_rightclipped)
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makerightedge = true;
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r_lastvertvalid = true;
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}
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}
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// if there was a clip off the left edge, add that edge too
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// FIXME: faster to do in screen space?
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// FIXME: share clipped edges?
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if (makeleftedge)
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{
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r_pedge = &tedge;
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r_lastvertvalid = false;
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R_ClipEdge (&r_leftexit, &r_leftenter, pclip->next);
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}
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// if there was a clip off the right edge, get the right r_nearzi
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if (makerightedge)
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{
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r_pedge = &tedge;
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r_lastvertvalid = false;
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r_nearzionly = true;
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R_ClipEdge (&r_rightexit, &r_rightenter, view_clipplanes[1].next);
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|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
}
|
|
|