light: Add stats

include/light/ltface.hh

@@ -38,6 +38,8 @@
 #include <limits>
 #include <sstream>
 
+extern std::atomic<uint32_t> total_light_rays, total_light_ray_hits, total_samplepoints;
+
 void FaceCentroid(const bsp2_dface_t *face, const bsp2_t *bsp, vec3_t out);
 void WorldToTexCoord(const vec3_t world, const texinfo_t *tex, vec_t coord[2]);
 vec_t GetLightValue(const light_t *entity, vec_t dist);

light/light.cc

@@ -1738,6 +1738,10 @@ main(int argc, const char **argv)
     WriteBSPFile(source, &bspdata);
     end = I_FloatTime();
     logprint("%5.3f seconds elapsed\n", end - start);
+    logprint("%f lights tested per sample point\n",
+             static_cast<double>(total_light_rays) / static_cast<double>(total_samplepoints));
+    logprint("%f lights hit per sample point\n",
+             static_cast<double>(total_light_ray_hits) / static_cast<double>(total_samplepoints));
 
     close_log();
     

light/ltface.cc

@@ -26,6 +26,8 @@
 
 #include <cassert>
 
+std::atomic<uint32_t> total_light_rays, total_light_ray_hits, total_samplepoints;
+
 static void
 PrintFaceInfo(const bsp2_dface_t *face, const bsp2_t *bsp);
 
@@ -1296,9 +1298,6 @@ VisCullEntity(const bsp2_t *bsp, const byte *pvs, const bsp2_dleaf_t *entleaf)
     return true;
 }
 
-extern int totalhit;
-extern int totalmissed;
-
 // FIXME: factor out / merge with LightFace
 void
 GetDirectLighting(raystream_t *rs, const vec3_t origin, const vec3_t normal, vec3_t colorout)
@@ -1438,12 +1437,15 @@ LightFace_Entity(const bsp2_t *bsp,
     }
     
     rs->tracePushedRaysOcclusion();
+    total_light_rays += rs->numPushedRays();
     
     const int N = rs->numPushedRays();
     for (int j = 0; j < N; j++) {
         if (rs->getPushedRayOccluded(j))
             continue;
 
+        total_light_ray_hits++;
+        
         int i = rs->getPushedRayPointIndex(j);
         lightsample_t *sample = &lightmap->samples[i];
         const vec_t *surfpoint = lightsurf->points[i];
@@ -2379,6 +2381,9 @@ LightFace(bsp2_dface_t *face, facesup_t *facesup, const modelinfo_t *modelinfo,
     if (!(debugmode == debugmode_dirt
           || debugmode == debugmode_phong
           || debugmode == debugmode_bounce)) {
+        
+        total_samplepoints += lightsurf->numpoints;
+        
         /* positive lights */
         for (const auto &entity : GetLights())
         {