add _nofill key, which causes an entity to not count as an entity for the purposes of occupancy (for lights in walls, etc)

add _nonudge key, to disabling nudging of lights "stuck" inside walls

include/light/entities.hh

@@ -101,6 +101,7 @@ public:
     settings::setting_int32 surflight_group;
     settings::setting_int32 light_channel_mask;
     settings::setting_int32 shadow_channel_mask;
+    settings::setting_bool nonudge;
 
     light_t();
 

light/entities.cc

@@ -107,7 +107,8 @@ light_t::light_t() :
     nostaticlight{this, "nostaticlight", false},
     surflight_group{this, "surflight_group", 0},
     light_channel_mask{this, "light_channel_mask", CHANNEL_MASK_DEFAULT},
-    shadow_channel_mask{this, "shadow_channel_mask", CHANNEL_MASK_DEFAULT}
+    shadow_channel_mask{this, "shadow_channel_mask", CHANNEL_MASK_DEFAULT},
+    nonudge{this, "nonudge", false}
 {}
 
 std::string light_t::classname() const
@@ -1021,7 +1022,7 @@ static qvec3d FixLightOnFace(const mbsp_t *bsp, const qvec3d &point)
 void FixLightsOnFaces(const mbsp_t *bsp)
 {
     for (auto &entity : all_lights) {
-        if (entity->light.value() != 0) {
+        if (entity->light.value() != 0 && !entity->nonudge.value()) {
             entity->origin.setValue(FixLightOnFace(bsp, entity->origin.value()), settings::source::MAP);
         }
     }

qbsp/outside.cc

@@ -322,11 +322,10 @@ static void MarkOccupiedClusters(node_t *headnode)
         if (qv::epsilonEmpty(entity.origin, QBSP_EQUAL_EPSILON))
             continue;
 
-#if 0
-        /* skip lights */
-        if (strcmp(ValueForKey(entity, "classname"), "light") == 0)
+        // skip nofill entities
+        if (entity.epairs.has("_nofill") && entity.epairs.get_int("_nofill")) {
             continue;
-#endif
+        }
 
         /* find the leaf it's in. Skip opqaue leafs */
         node_t *cluster = PointInLeaf(headnode, entity.origin);