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Quack 3: Arena
This commit is contained in:
Literally A Penguin
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commit
40035fa235
852
ref_soft/r_rast.c
Normal file
852
ref_soft/r_rast.c
Normal file
@@ -0,0 +1,852 @@
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/*
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Copyright (C) 1997-2001 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_rast.c
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#include <assert.h>
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#include "r_local.h"
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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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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[1280];
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int intsintable[1280];
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int blanktable[1280]; // PGM
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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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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 data from a box map...
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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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/*
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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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extern model_t *loadmodel;
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r_skyfaces = loadmodel->surfaces + loadmodel->numsurfaces;
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loadmodel->numsurfaces += 6;
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r_skyverts = loadmodel->vertexes + loadmodel->numvertexes;
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loadmodel->numvertexes += 8;
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r_skyedges = loadmodel->edges + loadmodel->numedges;
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loadmodel->numedges += 12;
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r_skysurfedges = loadmodel->surfedges + loadmodel->numsurfedges;
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loadmodel->numsurfedges += 24;
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if (loadmodel->numsurfaces > MAX_MAP_FACES
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|| loadmodel->numvertexes > MAX_MAP_VERTS
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|| loadmodel->numedges > MAX_MAP_EDGES)
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ri.Sys_Error (ERR_DROP, "InitSkyBox: map overflow");
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memset (r_skyfaces, 0, 6*sizeof(*r_skyfaces));
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for (i=0 ; i<6 ; i++)
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{
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r_skyplanes[i].normal[skybox_planes[i*2]] = 1;
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r_skyplanes[i].dist = skybox_planes[i*2+1];
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VectorCopy (box_vecs[i][0], r_skytexinfo[i].vecs[0]);
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VectorCopy (box_vecs[i][1], r_skytexinfo[i].vecs[1]);
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r_skyfaces[i].plane = &r_skyplanes[i];
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r_skyfaces[i].numedges = 4;
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r_skyfaces[i].flags = box_faces[i] | SURF_DRAWSKYBOX;
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r_skyfaces[i].firstedge = loadmodel->numsurfedges-24+i*4;
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r_skyfaces[i].texinfo = &r_skytexinfo[i];
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r_skyfaces[i].texturemins[0] = -128;
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r_skyfaces[i].texturemins[1] = -128;
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r_skyfaces[i].extents[0] = 256;
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r_skyfaces[i].extents[1] = 256;
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}
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for (i=0 ; i<24 ; i++)
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if (box_surfedges[i] > 0)
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r_skysurfedges[i] = loadmodel->numedges-13 + box_surfedges[i];
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else
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r_skysurfedges[i] = - (loadmodel->numedges-13 + -box_surfedges[i]);
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for(i=0 ; i<12 ; i++)
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{
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r_skyedges[i].v[0] = loadmodel->numvertexes-9+box_edges[i*2+0];
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r_skyedges[i].v[1] = loadmodel->numvertexes-9+box_edges[i*2+1];
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r_skyedges[i].cachededgeoffset = 0;
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}
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}
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/*
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================
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R_EmitSkyBox
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================
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*/
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void 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; // submodels should never have skies
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if (r_skyframe == r_framecount)
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return; // already set this frame
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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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}
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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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{
|
||||
// point 0 is unclipped
|
||||
if (d1 >= 0)
|
||||
{
|
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// both points are unclipped
|
||||
continue;
|
||||
}
|
||||
|
||||
// only point 1 is clipped
|
||||
|
||||
// we don't cache clipped edges
|
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cacheoffset = 0x7FFFFFFF;
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|
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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]);
|
||||
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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r_leftclipped = true;
|
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r_leftexit = clipvert;
|
||||
}
|
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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)
|
||||
{
|
||||
int i, lindex;
|
||||
unsigned mask;
|
||||
mplane_t *pplane;
|
||||
float distinv;
|
||||
vec3_t p_normal;
|
||||
medge_t *pedges, tedge;
|
||||
clipplane_t *pclip;
|
||||
|
||||
// translucent surfaces are not drawn by the edge renderer
|
||||
if (fa->texinfo->flags & (SURF_TRANS33|SURF_TRANS66))
|
||||
{
|
||||
fa->nextalphasurface = r_alpha_surfaces;
|
||||
r_alpha_surfaces = fa;
|
||||
return;
|
||||
}
|
||||
|
||||
// sky surfaces encountered in the world will cause the
|
||||
// environment box surfaces to be emited
|
||||
if ( fa->texinfo->flags & SURF_SKY )
|
||||
{
|
||||
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 = currentmodel->edges;
|
||||
r_lastvertvalid = false;
|
||||
|
||||
for (i=0 ; i<fa->numedges ; i++)
|
||||
{
|
||||
lindex = currentmodel->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 = (byte *)edge_p - (byte *)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 = (byte *)edge_p - (byte *)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->msurf = 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;
|
||||
|
||||
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;
|
||||
|
||||
if (psurf->texinfo->flags & (SURF_TRANS33|SURF_TRANS66))
|
||||
{
|
||||
psurf->nextalphasurface = r_alpha_surfaces;
|
||||
r_alpha_surfaces = psurf;
|
||||
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 + 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->msurf = 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;
|
||||
|
||||
surface_p++;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user