Function DrawTerrainTrianglesSoftware

Descent3/terrainrender.cpp:2715–2897

Draws the 2 triangles of the Terrainlist[index] (software)

static g3Point *slist[256];
// Draws the 2 triangles of the Terrainlist[index] (software)
int DrawTerrainTrianglesSoftware(int index, int bm_handle, int upper_left, int lower_right) {
  /*
  #if !defined(POSIX)
          int i,tlist[4],close=0,lit=0;
          float closest_z=9999;
          int color;
          int n=Terrain_list[index].segment;
          int lod=Terrain_list[index].lod;

          terrain_segment *tseg=&Terrain_seg[n];
          terrain_tex_segment *texseg=&Terrain_tex_seg[tseg->texseg_index];
          int rotation=texseg->rotation & 0x0F;
          int tile=texseg->rotation >> 4;
          int simplemul=1<<((MAX_TERRAIN_LOD-1)-lod);
          int cx,cz,smul_x,smul_z;
          #if (defined(EDITOR) || defined(NEWEDITOR))
                  ddgr_color oldcolor;
          #endif
          cx=n%TERRAIN_WIDTH;
          cz=n/TERRAIN_WIDTH;
          int subx=cx % MAX_LOD_SIZE;
          int subz=(MAX_LOD_SIZE-1)-((cz+(simplemul-1)) % MAX_LOD_SIZE);
          if (cx+simplemul==TERRAIN_WIDTH)
                  smul_x=simplemul-1;
          else
                  smul_x=simplemul;
          if (cz+simplemul==TERRAIN_DEPTH)
                  smul_z=simplemul-1;
          else
                  smul_z=simplemul;

          // Note - this is upper left and proceeds lockwise
          tlist[0]=n+(TERRAIN_WIDTH*smul_z);
          tlist[1]=n+(TERRAIN_WIDTH*smul_z)+(smul_x);
          tlist[2]=n+(smul_x);
          tlist[3]=n;
          rend_SetOverlayType (OT_NONE);
          for (close=0,i=0;i<4;i++)
          {
                  base[i]=*((g3Point *)&World_point_buffer[tlist[i]]);
                  base[i].p3_flags|=(PF_L|PF_RGBA);
                  base[i].p3_l=Ubyte_to_float[Terrain_seg[tlist[i]].l];

                  // only do perspective if all the points are inside our range
                  if (!UseHardware)
                  {
                          if (base[i].p3_vec.z<TERRAIN_PERSPECTIVE_TEXTURE_DEPTH)
                                  close=1;
                          if (base[i].p3_vec.z<closest_z)
                                  closest_z=base[i].p3_vec.z;
                  }
          }
          base[0].p3_u=TerrainUSpeedup[rotation][subz*LOD_ROW_SIZE+subx]*tile;
          base[0].p3_v=TerrainVSpeedup[rotation][subz*LOD_ROW_SIZE+subx]*tile;
          base[1].p3_u=TerrainUSpeedup[rotation][subz*LOD_ROW_SIZE+subx+simplemul]*tile;
          base[1].p3_v=TerrainVSpeedup[rotation][subz*LOD_ROW_SIZE+subx+simplemul]*tile;
          base[2].p3_u=TerrainUSpeedup[rotation][((subz+simplemul)*LOD_ROW_SIZE)+subx+simplemul]*tile;
          base[2].p3_v=TerrainVSpeedup[rotation][((subz+simplemul)*LOD_ROW_SIZE)+subx+simplemul]*tile;