Add R_LightPoint which is fast version of R_CompleteLightPoint that only grabs ambien...

[xonotic/darkplaces.git] / r_shadow.c

diff --git a/r_shadow.c b/r_shadow.c
index 52a2357d53662ef3cdf3e0b714a3e0c8a422cc20..c3286a20dec74dcdab3e3e0e4f5e0efa23320fc8 100644 (file)
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -6598,6 +6598,84 @@ LIGHT SAMPLING
 =============================================================================
 */
 
+void R_LightPoint(vec3_t color, const vec3_t p, const int flags)
+{
+       int i, numlights, flag;
+       float f, relativepoint[3], dist, dist2, lightradius2;
+       vec3_t diffuse, n;
+       rtlight_t *light;
+       dlight_t *dlight;
+
+       VectorClear(color);
+
+       if (r_fullbright.integer)
+       {
+               VectorSet(color, 1, 1, 1);
+               return;
+       }
+
+       if (flags & LP_LIGHTMAP)
+       {
+               if (!r_fullbright.integer && r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.LightPoint)
+               {
+                       r_refdef.scene.worldmodel->brush.LightPoint(r_refdef.scene.worldmodel, p, color, diffuse, n);
+                       color[0] += r_refdef.scene.ambient + diffuse[0];
+                       color[1] += r_refdef.scene.ambient + diffuse[1];
+                       color[2] += r_refdef.scene.ambient + diffuse[2];
+               }
+               else
+                       VectorSet(color, 1, 1, 1);
+       }
+       if (flags & LP_RTWORLD)
+       {
+               flag = r_refdef.scene.rtworld ? LIGHTFLAG_REALTIMEMODE : LIGHTFLAG_NORMALMODE;
+               numlights = Mem_ExpandableArray_IndexRange(&r_shadow_worldlightsarray);
+               for (i = 0; i < numlights; i++)
+               {
+                       dlight = (dlight_t *) Mem_ExpandableArray_RecordAtIndex(&r_shadow_worldlightsarray, i);
+                       if (!dlight)
+                               continue;
+                       light = &dlight->rtlight;
+                       if (!(light->flags & flag))
+                               continue;
+                       // sample
+                       lightradius2 = light->radius * light->radius;
+                       VectorSubtract(light->shadoworigin, p, relativepoint);
+                       dist2 = VectorLength2(relativepoint);
+                       if (dist2 >= lightradius2)
+                               continue;
+                       dist = sqrt(dist2) / light->radius;
+                       f = dist < 1 ? (r_shadow_lightintensityscale.value * ((1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist))) : 0;
+                       if (f <= 0)
+                               continue;
+                       // todo: add to both ambient and diffuse
+                       if (!light->shadow || CL_TraceLine(p, light->shadoworigin, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, true, false, NULL, false, true).fraction == 1)
+                               VectorMA(color, f, light->currentcolor, color);
+               }
+       }
+       if (flags & LP_DYNLIGHT)
+       {
+               // sample dlights
+               for (i = 0;i < r_refdef.scene.numlights;i++)
+               {
+                       light = r_refdef.scene.lights[i];
+                       // sample
+                       lightradius2 = light->radius * light->radius;
+                       VectorSubtract(light->shadoworigin, p, relativepoint);
+                       dist2 = VectorLength2(relativepoint);
+                       if (dist2 >= lightradius2)
+                               continue;
+                       dist = sqrt(dist2) / light->radius;
+                       f = dist < 1 ? (r_shadow_lightintensityscale.value * ((1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist))) : 0;
+                       if (f <= 0)
+                               continue;
+                       // todo: add to both ambient and diffuse
+                       if (!light->shadow || CL_TraceLine(p, light->shadoworigin, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, true, false, NULL, false, true).fraction == 1)
+                               VectorMA(color, f, light->color, color);
+               }
+       }
+}
+
 void R_CompleteLightPoint(vec3_t ambient, vec3_t diffuse, vec3_t lightdir, const vec3_t p, const int flags)
 {
        int i, numlights, flag;
@@ -6620,7 +6698,7 @@ void R_CompleteLightPoint(vec3_t ambient, vec3_t diffuse, vec3_t lightdir, const
                return;
        }
 
-       if (flags & LP_LIGHTMAP)
+       if (flags == LP_LIGHTMAP)
        {
                VectorSet(ambient, r_refdef.scene.ambient, r_refdef.scene.ambient, r_refdef.scene.ambient);
                VectorClear(diffuse);