Add `shadow_caster_mask` to Light3D.

9 files changed, 33 insertions, 4 deletions

diff --git a/servers/rendering/dummy/storage/light_storage.h b/servers/rendering/dummy/storage/light_storage.h
index c3b63cdbf6..d25523753c 100644
--- a/servers/rendering/dummy/storage/light_storage.h
+++ b/servers/rendering/dummy/storage/light_storage.h
@@ -78,6 +78,8 @@ public:
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) override {}
 	virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) override {}
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) override {}
+	virtual void light_set_shadow_caster_mask(RID p_light, uint32_t p_caster_mask) override {}
+	virtual uint32_t light_get_shadow_caster_mask(RID p_light) const override { return 0xFFFFFFFF; }
 	virtual void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) override {}
 	virtual void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) override {}
 
diff --git a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
index 3d294ca8cb..b4acdbec11 100644
--- a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
@@ -285,6 +285,23 @@ void LightStorage::light_set_reverse_cull_face_mode(RID p_light, bool p_enabled)
 	light->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_LIGHT);
 }
 
+void LightStorage::light_set_shadow_caster_mask(RID p_light, uint32_t p_caster_mask) {
+	Light *light = light_owner.get_or_null(p_light);
+	ERR_FAIL_NULL(light);
+
+	light->shadow_caster_mask = p_caster_mask;
+
+	light->version++;
+	light->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_LIGHT);
+}
+
+uint32_t LightStorage::light_get_shadow_caster_mask(RID p_light) const {
+	Light *light = light_owner.get_or_null(p_light);
+	ERR_FAIL_NULL_V(light, 0);
+
+	return light->shadow_caster_mask;
+}
+
 void LightStorage::light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) {
 	Light *light = light_owner.get_or_null(p_light);
 	ERR_FAIL_NULL(light);
diff --git a/servers/rendering/renderer_rd/storage_rd/light_storage.h b/servers/rendering/renderer_rd/storage_rd/light_storage.h
index f152cc5dae..34d8f58e2a 100644
--- a/servers/rendering/renderer_rd/storage_rd/light_storage.h
+++ b/servers/rendering/renderer_rd/storage_rd/light_storage.h
@@ -72,6 +72,7 @@ private:
 		RS::LightBakeMode bake_mode = RS::LIGHT_BAKE_DYNAMIC;
 		uint32_t max_sdfgi_cascade = 2;
 		uint32_t cull_mask = 0xFFFFFFFF;
+		uint32_t shadow_caster_mask = 0xFFFFFFFF;
 		bool distance_fade = false;
 		real_t distance_fade_begin = 40.0;
 		real_t distance_fade_shadow = 50.0;
@@ -474,6 +475,8 @@ public:
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) override;
 	virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) override;
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) override;
+	virtual void light_set_shadow_caster_mask(RID p_light, uint32_t p_caster_mask) override;
+	virtual uint32_t light_get_shadow_caster_mask(RID p_light) const override;
 	virtual void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) override;
 	virtual void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) override;
 
diff --git a/servers/rendering/renderer_scene_cull.cpp b/servers/rendering/renderer_scene_cull.cpp
index b02d3def88..74c79dbce4 100644
--- a/servers/rendering/renderer_scene_cull.cpp
+++ b/servers/rendering/renderer_scene_cull.cpp
@@ -2139,6 +2139,7 @@ void RendererSceneCull::_light_instance_setup_directional_shadow(int p_shadow_in
 	cull.shadow_count = p_shadow_index + 1;
 	cull.shadows[p_shadow_index].cascade_count = splits;
 	cull.shadows[p_shadow_index].light_instance = light->instance;
+	cull.shadows[p_shadow_index].caster_mask = RSG::light_storage->light_get_shadow_caster_mask(p_instance->base);
 
 	for (int i = 0; i < splits; i++) {
 		RENDER_TIMESTAMP("Cull DirectionalLight3D, Split " + itos(i));
@@ -2369,7 +2370,7 @@ bool RendererSceneCull::_light_instance_update_shadow(Instance *p_instance, cons
 
 					for (int j = 0; j < (int)instance_shadow_cull_result.size(); j++) {
 						Instance *instance = instance_shadow_cull_result[j];
-						if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask)) {
+						if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask & RSG::light_storage->light_get_shadow_caster_mask(p_instance->base))) {
 							continue;
 						} else {
 							if (static_cast<InstanceGeometryData *>(instance->base_data)->material_is_animated) {
@@ -2451,7 +2452,7 @@ bool RendererSceneCull::_light_instance_update_shadow(Instance *p_instance, cons
 
 					for (int j = 0; j < (int)instance_shadow_cull_result.size(); j++) {
 						Instance *instance = instance_shadow_cull_result[j];
-						if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask)) {
+						if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask & RSG::light_storage->light_get_shadow_caster_mask(p_instance->base))) {
 							continue;
 						} else {
 							if (static_cast<InstanceGeometryData *>(instance->base_data)->material_is_animated) {
@@ -2518,7 +2519,7 @@ bool RendererSceneCull::_light_instance_update_shadow(Instance *p_instance, cons
 
 			for (int j = 0; j < (int)instance_shadow_cull_result.size(); j++) {
 				Instance *instance = instance_shadow_cull_result[j];
-				if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask)) {
+				if (!instance->visible || !((1 << instance->base_type) & RS::INSTANCE_GEOMETRY_MASK) || !static_cast<InstanceGeometryData *>(instance->base_data)->can_cast_shadows || !(p_visible_layers & instance->layer_mask & RSG::light_storage->light_get_shadow_caster_mask(p_instance->base))) {
 					continue;
 				} else {
 					if (static_cast<InstanceGeometryData *>(instance->base_data)->material_is_animated) {
@@ -2978,7 +2979,7 @@ void RendererSceneCull::_scene_cull(CullData &cull_data, InstanceCullResult &cul
 					if (IN_FRUSTUM(cull_data.cull->shadows[j].cascades[k].frustum) && VIS_CHECK) {
 						uint32_t base_type = idata.flags & InstanceData::FLAG_BASE_TYPE_MASK;
 
-						if (((1 << base_type) & RS::INSTANCE_GEOMETRY_MASK) && idata.flags & InstanceData::FLAG_CAST_SHADOWS && LAYER_CHECK) {
+						if (((1 << base_type) & RS::INSTANCE_GEOMETRY_MASK) && idata.flags & InstanceData::FLAG_CAST_SHADOWS && (LAYER_CHECK & cull_data.cull->shadows[j].caster_mask)) {
 							cull_result.directional_shadows[j].cascade_geometry_instances[k].push_back(idata.instance_geometry);
 							mesh_visible = true;
 						}
diff --git a/servers/rendering/renderer_scene_cull.h b/servers/rendering/renderer_scene_cull.h
index 0039d14475..8f02860118 100644
--- a/servers/rendering/renderer_scene_cull.h
+++ b/servers/rendering/renderer_scene_cull.h
@@ -1084,6 +1084,7 @@ public:
 	struct Cull {
 		struct Shadow {
 			RID light_instance;
+			uint32_t caster_mask;
 			struct Cascade {
 				Frustum frustum;
 
diff --git a/servers/rendering/rendering_server_default.h b/servers/rendering/rendering_server_default.h
index 164ec3cc09..73c4706bee 100644
--- a/servers/rendering/rendering_server_default.h
+++ b/servers/rendering/rendering_server_default.h
@@ -377,6 +377,7 @@ public:
 	FUNC2(light_set_cull_mask, RID, uint32_t)
 	FUNC5(light_set_distance_fade, RID, bool, float, float, float)
 	FUNC2(light_set_reverse_cull_face_mode, RID, bool)
+	FUNC2(light_set_shadow_caster_mask, RID, uint32_t)
 	FUNC2(light_set_bake_mode, RID, LightBakeMode)
 	FUNC2(light_set_max_sdfgi_cascade, RID, uint32_t)
 
diff --git a/servers/rendering/storage/light_storage.h b/servers/rendering/storage/light_storage.h
index 6a0adfa596..1e149e3a97 100644
--- a/servers/rendering/storage/light_storage.h
+++ b/servers/rendering/storage/light_storage.h
@@ -59,6 +59,8 @@ public:
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) = 0;
 	virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) = 0;
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0;
+	virtual void light_set_shadow_caster_mask(RID p_light, uint32_t p_caster_mask) = 0;
+	virtual uint32_t light_get_shadow_caster_mask(RID p_light) const = 0;
 	virtual void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) = 0;
 	virtual void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) = 0;
 
diff --git a/servers/rendering_server.cpp b/servers/rendering_server.cpp
index 70b585d683..2549bfa7a3 100644
--- a/servers/rendering_server.cpp
+++ b/servers/rendering_server.cpp
@@ -2467,6 +2467,7 @@ void RenderingServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("light_set_cull_mask", "light", "mask"), &RenderingServer::light_set_cull_mask);
 	ClassDB::bind_method(D_METHOD("light_set_distance_fade", "decal", "enabled", "begin", "shadow", "length"), &RenderingServer::light_set_distance_fade);
 	ClassDB::bind_method(D_METHOD("light_set_reverse_cull_face_mode", "light", "enabled"), &RenderingServer::light_set_reverse_cull_face_mode);
+	ClassDB::bind_method(D_METHOD("light_set_shadow_caster_mask", "light", "mask"), &RenderingServer::light_set_shadow_caster_mask);
 	ClassDB::bind_method(D_METHOD("light_set_bake_mode", "light", "bake_mode"), &RenderingServer::light_set_bake_mode);
 	ClassDB::bind_method(D_METHOD("light_set_max_sdfgi_cascade", "light", "cascade"), &RenderingServer::light_set_max_sdfgi_cascade);
 
diff --git a/servers/rendering_server.h b/servers/rendering_server.h
index 693c822488..9e26710166 100644
--- a/servers/rendering_server.h
+++ b/servers/rendering_server.h
@@ -508,6 +508,7 @@ public:
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) = 0;
 	virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) = 0;
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0;
+	virtual void light_set_shadow_caster_mask(RID p_light, uint32_t p_caster_mask) = 0;
 
 	enum LightBakeMode {
 		LIGHT_BAKE_DISABLED,