improved shadowmap side culling

[xonotic/darkplaces.git] / gl_rsurf.c

diff --git a/gl_rsurf.c b/gl_rsurf.c
index 6943282e12f2192961761aba2e0f96c73badd194..f3f121ce376b76d545424c20280f4e4905ad534f 100644 (file)
--- a/gl_rsurf.c
+++ b/gl_rsurf.c
@@ -1059,42 +1059,65 @@ void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, const vec3_t relativelightor
                GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
 }
 
-void R_Q1BSP_DrawShadowMap(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
+void R_Q1BSP_CompileShadowMap(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 {
        dp_model_t *model = ent->model;
        msurface_t *surface;
-       int modelsurfacelistindex;
-       float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
+       int surfacelistindex;
+       int sidetotals[6] = { 0, 0, 0, 0, 0, 0 }, sidemasks = 0;
+       int i;
+       r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
+       R_Shadow_PrepareShadowSides(model->brush.shadowmesh->numtriangles);
+       for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
+       {
+               surface = model->data_surfaces + surfacelist[surfacelistindex];
+               sidemasks |= R_Shadow_ChooseSidesFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, &r_shadow_compilingrtlight->matrix_worldtolight, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs, surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW ? NULL : sidetotals);
+       }
+       R_Shadow_ShadowMapFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, numshadowsides, sidetotals, shadowsides, shadowsideslist);
+       r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_shadowmap, false, false, true);
+       r_shadow_compilingrtlight->static_shadowmap_receivers &= sidemasks;
+       for(i = 0;i<6;i++)
+               if(!sidetotals[i])
+                       r_shadow_compilingrtlight->static_shadowmap_casters &= ~(1 << i);
+}
+
+void R_Q1BSP_DrawShadowMap(int side, entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
+{
+       dp_model_t *model = ent->model;
+       msurface_t *surface, *batch[64];
+       int modelsurfacelistindex, batchsize;
        // check the box in modelspace, it was already checked in worldspace
        if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
                return;
-       if (model->brush.shadowmesh)
-       {
-               R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
-               for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
-               {
-                       surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
-                       if (R_GetCurrentTexture(surface->texture)->currentmaterialflags & MATERIALFLAG_NOSHADOW)
-                               continue;
-                       R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
-               }
-               R_Shadow_ShadowMapFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, 0, 0, model->brush.shadowmesh->element3i, numshadowmark, shadowmarklist);
-       }
-       else
+       // identify lit faces within the bounding box
+       for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
        {
-               projectdistance = lightradius + model->radius*2;
-               R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
-               // identify lit faces within the bounding box
-               for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
+               surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
+               rsurface.texture = R_GetCurrentTexture(surface->texture);
+               if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
+                       continue;
+               if(!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
+                       continue;
+               r_refdef.stats.lights_dynamicshadowtriangles += surface->num_triangles;
+               r_refdef.stats.lights_shadowtriangles += surface->num_triangles;
+               batch[0] = surface;
+        batchsize = 1;
+               while(++modelsurfacelistindex < modelnumsurfaces && batchsize < (int)(sizeof(batch)/sizeof(batch[0])))
                {
                        surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
-                       rsurface.texture = R_GetCurrentTexture(surface->texture);
-                       if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
+                       if(surface->texture != batch[0]->texture)
+                               break;
+                       if(!BoxesOverlap(lightmins, lightmaxs, surface->mins, surface->maxs))
                                continue;
-                       RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
-                       R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
+                       r_refdef.stats.lights_dynamicshadowtriangles += surface->num_triangles;
+                       r_refdef.stats.lights_shadowtriangles += surface->num_triangles;
+                       batch[batchsize++] = surface;
                }
-               R_Shadow_ShadowMapFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.vertex3f, rsurface.vertex3f_bufferobject, rsurface.vertex3f_bufferoffset, model->surfmesh.data_element3i, numshadowmark, shadowmarklist);
+               --modelsurfacelistindex;
+               GL_CullFace(rsurface.texture->currentmaterialflags & MATERIALFLAG_NOCULLFACE ? GL_NONE : r_refdef.view.cullface_back);
+               RSurf_PrepareVerticesForBatch(false, false, batchsize, batch);
+               RSurf_DrawBatch_Simple(batchsize, batch);
+               GL_LockArrays(0, 0);
        }
 }