path: root/servers/rendering/renderer_scene_cull.h

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/*  renderer_scene_cull.h                                                */
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#ifndef RENDERING_SERVER_SCENE_CULL_H
#define RENDERING_SERVER_SCENE_CULL_H

#include "core/templates/pass_func.h"
#include "servers/rendering/renderer_compositor.h"

#include "core/math/dynamic_bvh.h"
#include "core/math/geometry_3d.h"
#include "core/math/octree.h"
#include "core/os/semaphore.h"
#include "core/os/thread.h"
#include "core/templates/local_vector.h"
#include "core/templates/paged_allocator.h"
#include "core/templates/paged_array.h"
#include "core/templates/rid_owner.h"
#include "core/templates/self_list.h"
#include "servers/rendering/renderer_scene.h"
#include "servers/rendering/renderer_scene_render.h"
#include "servers/xr/xr_interface.h"
class RendererSceneCull : public RendererScene {
public:
	RendererSceneRender *scene_render;

	enum {
		SDFGI_MAX_CASCADES = 8
	};

	uint64_t render_pass;

	static RendererSceneCull *singleton;

	/* CAMERA API */

	struct Camera {
		enum Type {
			PERSPECTIVE,
			ORTHOGONAL,
			FRUSTUM
		};
		Type type;
		float fov;
		float znear, zfar;
		float size;
		Vector2 offset;
		uint32_t visible_layers;
		bool vaspect;
		RID env;
		RID effects;

		Transform transform;

		Camera() {
			visible_layers = 0xFFFFFFFF;
			fov = 75;
			type = PERSPECTIVE;
			znear = 0.05;
			zfar = 4000;
			size = 1.0;
			offset = Vector2();
			vaspect = false;
		}
	};

	mutable RID_PtrOwner<Camera> camera_owner;

	virtual RID camera_create();
	virtual void camera_set_perspective(RID p_camera, float p_fovy_degrees, float p_z_near, float p_z_far);
	virtual void camera_set_orthogonal(RID p_camera, float p_size, float p_z_near, float p_z_far);
	virtual void camera_set_frustum(RID p_camera, float p_size, Vector2 p_offset, float p_z_near, float p_z_far);
	virtual void camera_set_transform(RID p_camera, const Transform &p_transform);
	virtual void camera_set_cull_mask(RID p_camera, uint32_t p_layers);
	virtual void camera_set_environment(RID p_camera, RID p_env);
	virtual void camera_set_camera_effects(RID p_camera, RID p_fx);
	virtual void camera_set_use_vertical_aspect(RID p_camera, bool p_enable);
	virtual bool is_camera(RID p_camera) const;

	/* SCENARIO API */

	struct Instance;

	struct Scenario {
		enum IndexerType {
			INDEXER_GEOMETRY, //for geometry
			INDEXER_VOLUMES, //for everything else
			INDEXER_MAX
		};

		DynamicBVH indexers[INDEXER_MAX];

		RS::ScenarioDebugMode debug;
		RID self;

		List<Instance *> directional_lights;
		RID environment;
		RID fallback_environment;
		RID camera_effects;
		RID reflection_probe_shadow_atlas;
		RID reflection_atlas;

		SelfList<Instance>::List instances;

		LocalVector<RID> dynamic_lights;

		Scenario() {
			indexers[INDEXER_GEOMETRY].set_index(INDEXER_GEOMETRY);
			indexers[INDEXER_VOLUMES].set_index(INDEXER_VOLUMES);
			debug = RS::SCENARIO_DEBUG_DISABLED;
		}
	};

	int indexer_update_iterations = 0;

	mutable RID_PtrOwner<Scenario> scenario_owner;

	static void _instance_pair(Instance *p_A, Instance *p_B);
	static void _instance_unpair(Instance *p_A, Instance *p_B);

	static void _instance_update_mesh_instance(Instance *p_instance);

	virtual RID scenario_create();

	virtual void scenario_set_debug(RID p_scenario, RS::ScenarioDebugMode p_debug_mode);
	virtual void scenario_set_environment(RID p_scenario, RID p_environment);
	virtual void scenario_set_camera_effects(RID p_scenario, RID p_fx);
	virtual void scenario_set_fallback_environment(RID p_scenario, RID p_environment);
	virtual void scenario_set_reflection_atlas_size(RID p_scenario, int p_reflection_size, int p_reflection_count);
	virtual bool is_scenario(RID p_scenario) const;
	virtual RID scenario_get_environment(RID p_scenario);

	/* INSTANCING API */

	struct InstancePair {
		Instance *a;
		Instance *b;
		SelfList<InstancePair> list_a;
		SelfList<InstancePair> list_b;
		InstancePair() :
				list_a(this), list_b(this) {}
	};

	PagedAllocator<InstancePair> pair_allocator;

	struct InstanceBaseData {
		virtual ~InstanceBaseData() {}
	};

	struct Instance : RendererSceneRender::InstanceBase {
		RID self;
		//scenario stuff
		DynamicBVH::ID indexer_id;
		Scenario *scenario;
		SelfList<Instance> scenario_item;

		//aabb stuff
		bool update_aabb;
		bool update_dependencies;

		SelfList<Instance> update_item;

		AABB *custom_aabb; // <Zylann> would using aabb directly with a bool be better?
		float extra_margin;
		ObjectID object_id;

		float lod_begin;
		float lod_end;
		float lod_begin_hysteresis;
		float lod_end_hysteresis;
		RID lod_instance;

		Vector<Color> lightmap_target_sh; //target is used for incrementally changing the SH over time, this avoids pops in some corner cases and when going interior <-> exterior

		uint64_t last_render_pass;
		uint64_t last_frame_pass;

		uint64_t version; // changes to this, and changes to base increase version

		InstanceBaseData *base_data;

		SelfList<InstancePair>::List pairs;
		uint64_t pair_check;

		virtual void dependency_deleted(RID p_dependency) {
			if (p_dependency == base) {
				singleton->instance_set_base(self, RID());
			} else if (p_dependency == skeleton) {
				singleton->instance_attach_skeleton(self, RID());
			} else {
				singleton->_instance_queue_update(this, false, true);
			}
		}

		virtual void dependency_changed(bool p_aabb, bool p_dependencies) {
			singleton->_instance_queue_update(this, p_aabb, p_dependencies);
		}

		Instance() :
				scenario_item(this),
				update_item(this) {
			scenario = nullptr;

			update_aabb = false;
			update_dependencies = false;

			extra_margin = 0;

			visible = true;

			lod_begin = 0;
			lod_end = 0;
			lod_begin_hysteresis = 0;
			lod_end_hysteresis = 0;

			last_render_pass = 0;
			last_frame_pass = 0;
			version = 1;
			base_data = nullptr;

			custom_aabb = nullptr;

			pair_check = 0;
		}

		~Instance() {
			if (base_data) {
				memdelete(base_data);
			}
			if (custom_aabb) {
				memdelete(custom_aabb);
			}
		}
	};

	SelfList<Instance>::List _instance_update_list;
	void _instance_queue_update(Instance *p_instance, bool p_update_aabb, bool p_update_dependencies = false);

	struct InstanceGeometryData : public InstanceBaseData {
		Set<Instance *> lights;
		bool lighting_dirty;
		bool can_cast_shadows;
		bool material_is_animated;

		Set<Instance *> decals;
		bool decal_dirty;

		Set<Instance *> reflection_probes;
		bool reflection_dirty;

		Set<Instance *> gi_probes;
		bool gi_probes_dirty;

		Set<Instance *> lightmap_captures;

		InstanceGeometryData() {
			lighting_dirty = false;
			reflection_dirty = true;
			can_cast_shadows = true;
			material_is_animated = true;
			gi_probes_dirty = true;
			decal_dirty = true;
		}
	};

	struct InstanceReflectionProbeData : public InstanceBaseData {
		Instance *owner;

		Set<Instance *> geometries;

		RID instance;
		bool reflection_dirty;
		SelfList<InstanceReflectionProbeData> update_list;

		int render_step;

		InstanceReflectionProbeData() :
				update_list(this) {
			reflection_dirty = true;
			render_step = -1;
		}
	};

	struct InstanceDecalData : public InstanceBaseData {
		Instance *owner;
		RID instance;

		Set<Instance *> geometries;

		InstanceDecalData() {
		}
	};

	SelfList<InstanceReflectionProbeData>::List reflection_probe_render_list;

	struct InstanceLightData : public InstanceBaseData {
		RID instance;
		uint64_t last_version;
		List<Instance *>::Element *D; // directional light in scenario

		bool shadow_dirty;

		Set<Instance *> geometries;

		Instance *baked_light;

		RS::LightBakeMode bake_mode;
		uint32_t max_sdfgi_cascade = 2;

		uint64_t sdfgi_cascade_light_pass = 0;

		InstanceLightData() {
			bake_mode = RS::LIGHT_BAKE_DISABLED;
			shadow_dirty = true;
			D = nullptr;
			last_version = 0;
			baked_light = nullptr;
		}
	};

	struct InstanceGIProbeData : public InstanceBaseData {
		Instance *owner;

		Set<Instance *> geometries;
		Set<Instance *> dynamic_geometries;

		Set<Instance *> lights;

		struct LightCache {
			RS::LightType type;
			Transform transform;
			Color color;
			float energy;
			float bake_energy;
			float radius;
			float attenuation;
			float spot_angle;
			float spot_attenuation;
			bool has_shadow;
			bool sky_only;
		};

		Vector<LightCache> light_cache;
		Vector<RID> light_instances;

		RID probe_instance;

		bool invalid;
		uint32_t base_version;

		SelfList<InstanceGIProbeData> update_element;

		InstanceGIProbeData() :
				update_element(this) {
			invalid = true;
			base_version = 0;
		}
	};

	SelfList<InstanceGIProbeData>::List gi_probe_update_list;

	struct InstanceLightmapData : public InstanceBaseData {
		Set<Instance *> geometries;
		Set<Instance *> users;

		InstanceLightmapData() {
		}
	};

	uint64_t pair_pass = 1;

	struct PairInstances {
		Instance *instance = nullptr;
		PagedAllocator<InstancePair> *pair_allocator = nullptr;
		SelfList<InstancePair>::List pairs_found;
		DynamicBVH *bvh = nullptr;
		DynamicBVH *bvh2 = nullptr; //some may need to cull in two
		uint32_t pair_mask;
		uint64_t pair_pass;

		_FORCE_INLINE_ bool operator()(void *p_data) {
			Instance *p_instance = (Instance *)p_data;
			if (instance != p_instance && instance->transformed_aabb.intersects(p_instance->transformed_aabb) && (pair_mask & (1 << p_instance->base_type))) {
				//test is more coarse in indexer
				p_instance->pair_check = pair_pass;
				InstancePair *pair = pair_allocator->alloc();
				pair->a = instance;
				pair->b = p_instance;
				pairs_found.add(&pair->list_a);
			}
			return false;
		}

		void pair() {
			if (bvh) {
				bvh->aabb_query(instance->transformed_aabb, *this);
			}
			if (bvh2) {
				bvh2->aabb_query(instance->transformed_aabb, *this);
			}
			while (instance->pairs.first()) {
				InstancePair *pair = instance->pairs.first()->self();
				Instance *other_instance = instance == pair->a ? pair->b : pair->a;
				if (other_instance->pair_check != pair_pass) {
					//unpaired
					_instance_unpair(instance, other_instance);
				} else {
					//kept
					other_instance->pair_check = 0; // if kept, then put pair check to zero, so we can distinguish with the newly added ones
				}

				pair_allocator->free(pair);
			}
			while (pairs_found.first()) {
				InstancePair *pair = pairs_found.first()->self();
				pairs_found.remove(pairs_found.first());

				if (pair->b->pair_check == pair_pass) {
					//paired
					_instance_pair(instance, pair->b);
				}
				pair->a->pairs.add(&pair->list_a);
				pair->b->pairs.add(&pair->list_b);
			}
		}
	};

	struct CullResult {
		PagedArray<Instance *> *result;
		_FORCE_INLINE_ bool operator()(void *p_data) {
			Instance *p_instance = (Instance *)p_data;
			result->push_back(p_instance);
			return false;
		}
	};

	Set<Instance *> heightfield_particle_colliders_update_list;

	PagedArrayPool<Instance *> instance_cull_page_pool;
	PagedArrayPool<RendererSceneRender::InstanceBase *> base_instance_cull_page_pool;
	PagedArrayPool<RID> rid_cull_page_pool;

	PagedArray<Instance *> instance_cull_result;
	PagedArray<RendererSceneRender::InstanceBase *> geometry_instances_to_render;
	PagedArray<Instance *> instance_shadow_cull_result;
	PagedArray<RendererSceneRender::InstanceBase *> geometry_instances_to_shadow_render;
	PagedArray<Instance *> instance_sdfgi_cull_result;
	PagedArray<RendererSceneRender::InstanceBase *> geometry_instances_to_sdfgi_render;
	PagedArray<Instance *> light_cull_result;
	PagedArray<RendererSceneRender::InstanceBase *> lightmap_cull_result;
	PagedArray<Instance *> directional_shadow_cull_result;
	PagedArray<RID> reflection_probe_instance_cull_result;
	PagedArray<RID> light_instance_cull_result;
	PagedArray<RID> directional_light_cull_result;
	PagedArray<RID> gi_probe_instance_cull_result;
	PagedArray<RID> decal_instance_cull_result;

	PagedArray<RID> sdfgi_cascade_lights[SDFGI_MAX_CASCADES];

	uint64_t sdfgi_light_cull_pass = 0;
	int directional_light_count;

	RID_PtrOwner<Instance> instance_owner;

	bool pair_volumes_to_mesh; // used in traditional forward, unnecesary on clustered

	virtual RID instance_create();

	virtual void instance_set_base(RID p_instance, RID p_base);
	virtual void instance_set_scenario(RID p_instance, RID p_scenario);
	virtual void instance_set_layer_mask(RID p_instance, uint32_t p_mask);
	virtual void instance_set_transform(RID p_instance, const Transform &p_transform);
	virtual void instance_attach_object_instance_id(RID p_instance, ObjectID p_id);
	virtual void instance_set_blend_shape_weight(RID p_instance, int p_shape, float p_weight);
	virtual void instance_set_surface_material(RID p_instance, int p_surface, RID p_material);
	virtual void instance_set_visible(RID p_instance, bool p_visible);

	virtual void instance_set_custom_aabb(RID p_instance, AABB p_aabb);

	virtual void instance_attach_skeleton(RID p_instance, RID p_skeleton);
	virtual void instance_set_exterior(RID p_instance, bool p_enabled);

	virtual void instance_set_extra_visibility_margin(RID p_instance, real_t p_margin);

	// don't use these in a game!
	virtual Vector<ObjectID> instances_cull_aabb(const AABB &p_aabb, RID p_scenario = RID()) const;
	virtual Vector<ObjectID> instances_cull_ray(const Vector3 &p_from, const Vector3 &p_to, RID p_scenario = RID()) const;
	virtual Vector<ObjectID> instances_cull_convex(const Vector<Plane> &p_convex, RID p_scenario = RID()) const;

	virtual void instance_geometry_set_flag(RID p_instance, RS::InstanceFlags p_flags, bool p_enabled);
	virtual void instance_geometry_set_cast_shadows_setting(RID p_instance, RS::ShadowCastingSetting p_shadow_casting_setting);
	virtual void instance_geometry_set_material_override(RID p_instance, RID p_material);

	virtual void instance_geometry_set_draw_range(RID p_instance, float p_min, float p_max, float p_min_margin, float p_max_margin);
	virtual void instance_geometry_set_as_instance_lod(RID p_instance, RID p_as_lod_of_instance);
	virtual void instance_geometry_set_lightmap(RID p_instance, RID p_lightmap, const Rect2 &p_lightmap_uv_scale, int p_slice_index);
	virtual void instance_geometry_set_lod_bias(RID p_instance, float p_lod_bias);

	void _update_instance_shader_parameters_from_material(Map<StringName, RendererSceneRender::InstanceBase::InstanceShaderParameter> &isparams, const Map<StringName, RendererSceneRender::InstanceBase::InstanceShaderParameter> &existing_isparams, RID p_material);

	virtual void instance_geometry_set_shader_parameter(RID p_instance, const StringName &p_parameter, const Variant &p_value);
	virtual void instance_geometry_get_shader_parameter_list(RID p_instance, List<PropertyInfo> *p_parameters) const;
	virtual Variant instance_geometry_get_shader_parameter(RID p_instance, const StringName &p_parameter) const;
	virtual Variant instance_geometry_get_shader_parameter_default_value(RID p_instance, const StringName &p_parameter) const;

	_FORCE_INLINE_ void _update_instance(Instance *p_instance);
	_FORCE_INLINE_ void _update_instance_aabb(Instance *p_instance);
	_FORCE_INLINE_ void _update_dirty_instance(Instance *p_instance);
	_FORCE_INLINE_ void _update_instance_lightmap_captures(Instance *p_instance);
	void _unpair_instance(Instance *p_instance);

	_FORCE_INLINE_ bool _light_instance_update_shadow(Instance *p_instance, const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, bool p_cam_vaspect, RID p_shadow_atlas, Scenario *p_scenario, float p_scren_lod_threshold);

	RID _render_get_environment(RID p_camera, RID p_scenario);

	bool _render_reflection_probe_step(Instance *p_instance, int p_step);
	void _prepare_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, bool p_cam_vaspect, RID p_render_buffers, RID p_environment, uint32_t p_visible_layers, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, float p_screen_lod_threshold, bool p_using_shadows = true);
	void _render_scene(RID p_render_buffers, const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_environment, RID p_force_camera_effects, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, int p_reflection_probe_pass, float p_screen_lod_threshold);
	void render_empty_scene(RID p_render_buffers, RID p_scenario, RID p_shadow_atlas);

	void render_camera(RID p_render_buffers, RID p_camera, RID p_scenario, Size2 p_viewport_size, float p_screen_lod_threshold, RID p_shadow_atlas);
	void render_camera(RID p_render_buffers, Ref<XRInterface> &p_interface, XRInterface::Eyes p_eye, RID p_camera, RID p_scenario, Size2 p_viewport_size, float p_screen_lod_threshold, RID p_shadow_atlas);
	void update_dirty_instances();

	void render_particle_colliders();
	virtual void render_probes();

	TypedArray<Image> bake_render_uv2(RID p_base, const Vector<RID> &p_material_overrides, const Size2i &p_image_size);

	//pass to scene render

	/* ENVIRONMENT API */

#ifdef PASSBASE
#undef PASSBASE
#endif

#define PASSBASE scene_render

	PASS1(directional_shadow_atlas_set_size, int)
	PASS1(gi_probe_set_quality, RS::GIProbeQuality)

	/* SKY API */

	PASS0R(RID, sky_create)
	PASS2(sky_set_radiance_size, RID, int)
	PASS2(sky_set_mode, RID, RS::SkyMode)
	PASS2(sky_set_material, RID, RID)
	PASS4R(Ref<Image>, sky_bake_panorama, RID, float, bool, const Size2i &)

	PASS0R(RID, environment_create)

	PASS1RC(bool, is_environment, RID)

	PASS2(environment_set_background, RID, RS::EnvironmentBG)
	PASS2(environment_set_sky, RID, RID)
	PASS2(environment_set_sky_custom_fov, RID, float)
	PASS2(environment_set_sky_orientation, RID, const Basis &)
	PASS2(environment_set_bg_color, RID, const Color &)
	PASS2(environment_set_bg_energy, RID, float)
	PASS2(environment_set_canvas_max_layer, RID, int)
	PASS7(environment_set_ambient_light, RID, const Color &, RS::EnvironmentAmbientSource, float, float, RS::EnvironmentReflectionSource, const Color &)

	PASS6(environment_set_ssr, RID, bool, int, float, float, float)
	PASS1(environment_set_ssr_roughness_quality, RS::EnvironmentSSRRoughnessQuality)

	PASS10(environment_set_ssao, RID, bool, float, float, float, float, float, float, float, float)
	PASS6(environment_set_ssao_quality, RS::EnvironmentSSAOQuality, bool, float, int, float, float)

	PASS11(environment_set_glow, RID, bool, Vector<float>, float, float, float, float, RS::EnvironmentGlowBlendMode, float, float, float)
	PASS1(environment_glow_set_use_bicubic_upscale, bool)
	PASS1(environment_glow_set_use_high_quality, bool)

	PASS9(environment_set_tonemap, RID, RS::EnvironmentToneMapper, float, float, bool, float, float, float, float)

	PASS7(environment_set_adjustment, RID, bool, float, float, float, bool, RID)

	PASS9(environment_set_fog, RID, bool, const Color &, float, float, float, float, float, float)
	PASS9(environment_set_volumetric_fog, RID, bool, float, const Color &, float, float, float, float, RS::EnvVolumetricFogShadowFilter)

	PASS2(environment_set_volumetric_fog_volume_size, int, int)
	PASS1(environment_set_volumetric_fog_filter_active, bool)
	PASS1(environment_set_volumetric_fog_directional_shadow_shrink_size, int)
	PASS1(environment_set_volumetric_fog_positional_shadow_shrink_size, int)

	PASS11(environment_set_sdfgi, RID, bool, RS::EnvironmentSDFGICascades, float, RS::EnvironmentSDFGIYScale, bool, bool, bool, float, float, float)
	PASS1(environment_set_sdfgi_ray_count, RS::EnvironmentSDFGIRayCount)
	PASS1(environment_set_sdfgi_frames_to_converge, RS::EnvironmentSDFGIFramesToConverge)

	PASS1RC(RS::EnvironmentBG, environment_get_background, RID)
	PASS1RC(int, environment_get_canvas_max_layer, RID)

	PASS3R(Ref<Image>, environment_bake_panorama, RID, bool, const Size2i &)

	PASS3(screen_space_roughness_limiter_set_active, bool, float, float)
	PASS1(sub_surface_scattering_set_quality, RS::SubSurfaceScatteringQuality)
	PASS2(sub_surface_scattering_set_scale, float, float)

	/* CAMERA EFFECTS */

	PASS0R(RID, camera_effects_create)

	PASS2(camera_effects_set_dof_blur_quality, RS::DOFBlurQuality, bool)
	PASS1(camera_effects_set_dof_blur_bokeh_shape, RS::DOFBokehShape)

	PASS8(camera_effects_set_dof_blur, RID, bool, float, float, bool, float, float, float)
	PASS3(camera_effects_set_custom_exposure, RID, bool, float)

	PASS1(shadows_quality_set, RS::ShadowQuality)
	PASS1(directional_shadow_quality_set, RS::ShadowQuality)

	PASS2(sdfgi_set_debug_probe_select, const Vector3 &, const Vector3 &)

	/* Render Buffers */

	PASS0R(RID, render_buffers_create)
	PASS7(render_buffers_configure, RID, RID, int, int, RS::ViewportMSAA, RS::ViewportScreenSpaceAA, bool)

	/* Shadow Atlas */
	PASS0R(RID, shadow_atlas_create)
	PASS2(shadow_atlas_set_size, RID, int)
	PASS3(shadow_atlas_set_quadrant_subdivision, RID, int, int)

	PASS1(set_debug_draw_mode, RS::ViewportDebugDraw)

	virtual void update();

	bool free(RID p_rid);

	RendererSceneCull();
	virtual ~RendererSceneCull();
};

#endif // VISUALSERVERSCENE_H