+void Mod_BuildLightmapUpdateChains(mempool_t *mempool, model_t *model)
+{
+ int i, j, stylecounts[256], totalcount, remapstyles[256];
+ msurface_t *surf;
+ memset(stylecounts, 0, sizeof(stylecounts));
+ for (i = 0;i < model->nummodelsurfaces;i++)
+ {
+ surf = model->surfaces + model->firstmodelsurface + i;
+ for (j = 0;j < MAXLIGHTMAPS;j++)
+ stylecounts[surf->styles[j]]++;
+ }
+ totalcount = 0;
+ model->light_styles = 0;
+ for (i = 0;i < 255;i++)
+ {
+ if (stylecounts[i])
+ {
+ remapstyles[i] = model->light_styles++;
+ totalcount += stylecounts[i] + 1;
+ }
+ }
+ if (!totalcount)
+ return;
+ model->light_style = Mem_Alloc(mempool, model->light_styles * sizeof(qbyte));
+ model->light_stylevalue = Mem_Alloc(mempool, model->light_styles * sizeof(int));
+ model->light_styleupdatechains = Mem_Alloc(mempool, model->light_styles * sizeof(msurface_t **));
+ model->light_styleupdatechainsbuffer = Mem_Alloc(mempool, totalcount * sizeof(msurface_t *));
+ model->light_styles = 0;
+ for (i = 0;i < 255;i++)
+ if (stylecounts[i])
+ model->light_style[model->light_styles++] = i;
+ j = 0;
+ for (i = 0;i < model->light_styles;i++)
+ {
+ model->light_styleupdatechains[i] = model->light_styleupdatechainsbuffer + j;
+ j += stylecounts[model->light_style[i]] + 1;
+ }
+ for (i = 0;i < model->nummodelsurfaces;i++)
+ {
+ surf = model->surfaces + model->firstmodelsurface + i;
+ for (j = 0;j < MAXLIGHTMAPS;j++)
+ if (surf->styles[j] != 255)
+ *model->light_styleupdatechains[remapstyles[surf->styles[j]]]++ = surf;
+ }
+ j = 0;
+ for (i = 0;i < model->light_styles;i++)
+ {
+ *model->light_styleupdatechains[i] = NULL;
+ model->light_styleupdatechains[i] = model->light_styleupdatechainsbuffer + j;
+ j += stylecounts[model->light_style[i]] + 1;
+ }
+}
+