/*************************************************************************/
/*  fog.cpp                                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#include "fog.h"

#include "servers/rendering/renderer_rd/renderer_compositor_rd.h"
#include "servers/rendering/renderer_rd/storage_rd/material_storage.h"
#include "servers/rendering/renderer_rd/storage_rd/texture_storage.h"
#include "servers/rendering/rendering_server_default.h"

using namespace RendererRD;

Fog *Fog::singleton = nullptr;

Fog::Fog() {
	singleton = this;
}

Fog::~Fog() {
	singleton = nullptr;
}

/* FOG VOLUMES */

RID Fog::fog_volume_allocate() {
	return fog_volume_owner.allocate_rid();
}

void Fog::fog_volume_initialize(RID p_rid) {
	fog_volume_owner.initialize_rid(p_rid, FogVolume());
}

void Fog::fog_free(RID p_rid) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_rid);
	fog_volume->dependency.deleted_notify(p_rid);
	fog_volume_owner.free(p_rid);
}

void Fog::fog_volume_set_shape(RID p_fog_volume, RS::FogVolumeShape p_shape) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);

	if (p_shape == fog_volume->shape) {
		return;
	}

	fog_volume->shape = p_shape;
	fog_volume->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_AABB);
}

void Fog::fog_volume_set_extents(RID p_fog_volume, const Vector3 &p_extents) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);

	fog_volume->extents = p_extents;
	fog_volume->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_AABB);
}

void Fog::fog_volume_set_material(RID p_fog_volume, RID p_material) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);
	fog_volume->material = p_material;
}

RID Fog::fog_volume_get_material(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, RID());

	return fog_volume->material;
}

RS::FogVolumeShape Fog::fog_volume_get_shape(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, RS::FOG_VOLUME_SHAPE_BOX);

	return fog_volume->shape;
}

AABB Fog::fog_volume_get_aabb(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, AABB());

	switch (fog_volume->shape) {
		case RS::FOG_VOLUME_SHAPE_ELLIPSOID:
		case RS::FOG_VOLUME_SHAPE_CONE:
		case RS::FOG_VOLUME_SHAPE_CYLINDER:
		case RS::FOG_VOLUME_SHAPE_BOX: {
			AABB aabb;
			aabb.position = -fog_volume->extents;
			aabb.size = fog_volume->extents * 2;
			return aabb;
		}
		default: {
			// Need some size otherwise will get culled
			return AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
		}
	}

	return AABB();
}

Vector3 Fog::fog_volume_get_extents(RID p_fog_volume) const {
	const FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, Vector3());
	return fog_volume->extents;
}

////////////////////////////////////////////////////////////////////////////////
// Fog material

bool Fog::FogMaterialData::update_parameters(const HashMap<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty) {
	uniform_set_updated = true;

	return update_parameters_uniform_set(p_parameters, p_uniform_dirty, p_textures_dirty, shader_data->uniforms, shader_data->ubo_offsets.ptr(), shader_data->texture_uniforms, shader_data->default_texture_params, shader_data->ubo_size, uniform_set, Fog::get_singleton()->volumetric_fog.shader.version_get_shader(shader_data->version, 0), VolumetricFogShader::FogSet::FOG_SET_MATERIAL);
}

Fog::FogMaterialData::~FogMaterialData() {
	free_parameters_uniform_set(uniform_set);
}

RendererRD::MaterialStorage::ShaderData *Fog::_create_fog_shader_func() {
	FogShaderData *shader_data = memnew(FogShaderData);
	return shader_data;
}

RendererRD::MaterialStorage::ShaderData *Fog::_create_fog_shader_funcs() {
	return Fog::get_singleton()->_create_fog_shader_func();
};

RendererRD::MaterialStorage::MaterialData *Fog::_create_fog_material_func(FogShaderData *p_shader) {
	FogMaterialData *material_data = memnew(FogMaterialData);
	material_data->shader_data = p_shader;
	//update will happen later anyway so do nothing.
	return material_data;
}

RendererRD::MaterialStorage::MaterialData *Fog::_create_fog_material_funcs(RendererRD::MaterialStorage::ShaderData *p_shader) {
	return Fog::get_singleton()->_create_fog_material_func(static_cast<FogShaderData *>(p_shader));
};

////////////////////////////////////////////////////////////////////////////////
// FOG VOLUMES INSTANCE

RID Fog::fog_volume_instance_create(RID p_fog_volume) {
	FogVolumeInstance fvi;
	fvi.volume = p_fog_volume;
	return fog_volume_instance_owner.make_rid(fvi);
}

void Fog::fog_instance_free(RID p_rid) {
	fog_volume_instance_owner.free(p_rid);
}

////////////////////////////////////////////////////////////////////////////////
// Volumetric Fog Shader

void Fog::init_fog_shader(uint32_t p_max_directional_lights, int p_roughness_layers, bool p_is_using_radiance_cubemap_array) {
	MaterialStorage *material_storage = MaterialStorage::get_singleton();

	{
		// Initialize local fog shader
		Vector<String> volumetric_fog_modes;
		volumetric_fog_modes.push_back("");
		volumetric_fog.shader.initialize(volumetric_fog_modes);

		material_storage->shader_set_data_request_function(RendererRD::MaterialStorage::SHADER_TYPE_FOG, _create_fog_shader_funcs);
		material_storage->material_set_data_request_function(RendererRD::MaterialStorage::SHADER_TYPE_FOG, _create_fog_material_funcs);
		volumetric_fog.volume_ubo = RD::get_singleton()->uniform_buffer_create(sizeof(VolumetricFogShader::VolumeUBO));
	}

	{
		ShaderCompiler::DefaultIdentifierActions actions;

		actions.renames["TIME"] = "scene_params.time";
		actions.renames["PI"] = _MKSTR(Math_PI);
		actions.renames["TAU"] = _MKSTR(Math_TAU);
		actions.renames["E"] = _MKSTR(Math_E);
		actions.renames["WORLD_POSITION"] = "world.xyz";
		actions.renames["OBJECT_POSITION"] = "params.position";
		actions.renames["UVW"] = "uvw";
		actions.renames["EXTENTS"] = "params.extents";
		actions.renames["ALBEDO"] = "albedo";
		actions.renames["DENSITY"] = "density";
		actions.renames["EMISSION"] = "emission";
		actions.renames["SDF"] = "sdf";

		actions.usage_defines["SDF"] = "#define SDF_USED\n";
		actions.usage_defines["DENSITY"] = "#define DENSITY_USED\n";
		actions.usage_defines["ALBEDO"] = "#define ALBEDO_USED\n";
		actions.usage_defines["EMISSION"] = "#define EMISSION_USED\n";

		actions.sampler_array_name = "material_samplers";
		actions.base_texture_binding_index = 1;
		actions.texture_layout_set = VolumetricFogShader::FogSet::FOG_SET_MATERIAL;
		actions.base_uniform_string = "material.";

		actions.default_filter = ShaderLanguage::FILTER_LINEAR_MIPMAP;
		actions.default_repeat = ShaderLanguage::REPEAT_DISABLE;
		actions.global_buffer_array_variable = "global_variables.data";

		volumetric_fog.compiler.initialize(actions);
	}

	{
		// default material and shader for fog shader
		volumetric_fog.default_shader = material_storage->shader_allocate();
		material_storage->shader_initialize(volumetric_fog.default_shader);
		material_storage->shader_set_code(volumetric_fog.default_shader, R"(
// Default fog shader.

shader_type fog;

void fog() {
DENSITY = 1.0;
ALBEDO = vec3(1.0);
}
)");
		volumetric_fog.default_material = material_storage->material_allocate();
		material_storage->material_initialize(volumetric_fog.default_material);
		material_storage->material_set_shader(volumetric_fog.default_material, volumetric_fog.default_shader);

		FogMaterialData *md = static_cast<FogMaterialData *>(material_storage->material_get_data(volumetric_fog.default_material, RendererRD::MaterialStorage::SHADER_TYPE_FOG));
		volumetric_fog.default_shader_rd = volumetric_fog.shader.version_get_shader(md->shader_data->version, 0);

		Vector<RD::Uniform> uniforms;

		{
			Vector<RID> ids;
			ids.resize(12);
			RID *ids_ptr = ids.ptrw();
			ids_ptr[0] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[1] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[2] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST_WITH_MIPMAPS, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[3] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR_WITH_MIPMAPS, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[4] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST_WITH_MIPMAPS_ANISOTROPIC, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[5] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR_WITH_MIPMAPS_ANISOTROPIC, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
			ids_ptr[6] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);
			ids_ptr[7] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);
			ids_ptr[8] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST_WITH_MIPMAPS, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);
			ids_ptr[9] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR_WITH_MIPMAPS, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);
			ids_ptr[10] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST_WITH_MIPMAPS_ANISOTROPIC, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);
			ids_ptr[11] = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR_WITH_MIPMAPS_ANISOTROPIC, RS::CANVAS_ITEM_TEXTURE_REPEAT_ENABLED);

			RD::Uniform u(RD::UNIFORM_TYPE_SAMPLER, 1, ids);
			uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
			u.binding = 2;
			u.append_id(RendererRD::MaterialStorage::get_singleton()->global_shader_uniforms_get_storage_buffer());
			uniforms.push_back(u);
		}

		volumetric_fog.base_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.default_shader_rd, VolumetricFogShader::FogSet::FOG_SET_BASE);
	}
	{
		String defines = "\n#define MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS " + itos(p_max_directional_lights) + "\n";
		defines += "\n#define MAX_SKY_LOD " + itos(p_roughness_layers - 1) + ".0\n";
		if (p_is_using_radiance_cubemap_array) {
			defines += "\n#define USE_RADIANCE_CUBEMAP_ARRAY \n";
		}
		Vector<String> volumetric_fog_modes;
		volumetric_fog_modes.push_back("\n#define MODE_DENSITY\n");
		volumetric_fog_modes.push_back("\n#define MODE_DENSITY\n#define ENABLE_SDFGI\n");
		volumetric_fog_modes.push_back("\n#define MODE_FILTER\n");
		volumetric_fog_modes.push_back("\n#define MODE_FOG\n");
		volumetric_fog_modes.push_back("\n#define MODE_COPY\n");

		volumetric_fog.process_shader.initialize(volumetric_fog_modes, defines);
		volumetric_fog.process_shader_version = volumetric_fog.process_shader.version_create();
		for (int i = 0; i < VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_MAX; i++) {
			volumetric_fog.process_pipelines[i] = RD::get_singleton()->compute_pipeline_create(volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, i));
		}
		volumetric_fog.params_ubo = RD::get_singleton()->uniform_buffer_create(sizeof(VolumetricFogShader::ParamsUBO));
	}
}

void Fog::free_fog_shader() {
	MaterialStorage *material_storage = MaterialStorage::get_singleton();

	volumetric_fog.process_shader.version_free(volumetric_fog.process_shader_version);
	RD::get_singleton()->free(volumetric_fog.volume_ubo);
	RD::get_singleton()->free(volumetric_fog.params_ubo);
	material_storage->shader_free(volumetric_fog.default_shader);
	material_storage->material_free(volumetric_fog.default_material);
}

void Fog::FogShaderData::set_path_hint(const String &p_path) {
	path = p_path;
}

void Fog::FogShaderData::set_code(const String &p_code) {
	//compile

	code = p_code;
	valid = false;
	ubo_size = 0;
	uniforms.clear();

	if (code.is_empty()) {
		return; //just invalid, but no error
	}

	ShaderCompiler::GeneratedCode gen_code;
	ShaderCompiler::IdentifierActions actions;
	actions.entry_point_stages["fog"] = ShaderCompiler::STAGE_COMPUTE;

	uses_time = false;

	actions.usage_flag_pointers["TIME"] = &uses_time;

	actions.uniforms = &uniforms;

	Fog *fog_singleton = Fog::get_singleton();

	Error err = fog_singleton->volumetric_fog.compiler.compile(RS::SHADER_FOG, code, &actions, path, gen_code);
	ERR_FAIL_COND_MSG(err != OK, "Fog shader compilation failed.");

	if (version.is_null()) {
		version = fog_singleton->volumetric_fog.shader.version_create();
	}

	fog_singleton->volumetric_fog.shader.version_set_compute_code(version, gen_code.code, gen_code.uniforms, gen_code.stage_globals[ShaderCompiler::STAGE_COMPUTE], gen_code.defines);
	ERR_FAIL_COND(!fog_singleton->volumetric_fog.shader.version_is_valid(version));

	ubo_size = gen_code.uniform_total_size;
	ubo_offsets = gen_code.uniform_offsets;
	texture_uniforms = gen_code.texture_uniforms;

	pipeline = RD::get_singleton()->compute_pipeline_create(fog_singleton->volumetric_fog.shader.version_get_shader(version, 0));

	valid = true;
}

void Fog::FogShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
	if (!p_texture.is_valid()) {
		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
			default_texture_params[p_name].erase(p_index);

			if (default_texture_params[p_name].is_empty()) {
				default_texture_params.erase(p_name);
			}
		}
	} else {
		if (!default_texture_params.has(p_name)) {
			default_texture_params[p_name] = HashMap<int, RID>();
		}
		default_texture_params[p_name][p_index] = p_texture;
	}
}

void Fog::FogShaderData::get_shader_uniform_list(List<PropertyInfo> *p_param_list) const {
	RBMap<int, StringName> order;

	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
		if (E.value.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL || E.value.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
			continue;
		}

		if (E.value.texture_order >= 0) {
			order[E.value.texture_order + 100000] = E.key;
		} else {
			order[E.value.order] = E.key;
		}
	}

	String last_group;
	for (const KeyValue<int, StringName> &E : order) {
		String group = uniforms[E.value].group;
		if (!uniforms[E.value].subgroup.is_empty()) {
			group += "::" + uniforms[E.value].subgroup;
		}

		if (group != last_group) {
			PropertyInfo pi;
			pi.usage = PROPERTY_USAGE_GROUP;
			pi.name = group;
			p_param_list->push_back(pi);

			last_group = group;
		}

		PropertyInfo pi = ShaderLanguage::uniform_to_property_info(uniforms[E.value]);
		pi.name = E.value;
		p_param_list->push_back(pi);
	}
}

void Fog::FogShaderData::get_instance_param_list(List<RendererMaterialStorage::InstanceShaderParam> *p_param_list) const {
	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
			continue;
		}

		RendererMaterialStorage::InstanceShaderParam p;
		p.info = ShaderLanguage::uniform_to_property_info(E.value);
		p.info.name = E.key; //supply name
		p.index = E.value.instance_index;
		p.default_value = ShaderLanguage::constant_value_to_variant(E.value.default_value, E.value.type, E.value.array_size, E.value.hint);
		p_param_list->push_back(p);
	}
}

bool Fog::FogShaderData::is_param_texture(const StringName &p_param) const {
	if (!uniforms.has(p_param)) {
		return false;
	}

	return uniforms[p_param].texture_order >= 0;
}

bool Fog::FogShaderData::is_animated() const {
	return false;
}

bool Fog::FogShaderData::casts_shadows() const {
	return false;
}

Variant Fog::FogShaderData::get_default_parameter(const StringName &p_parameter) const {
	if (uniforms.has(p_parameter)) {
		ShaderLanguage::ShaderNode::Uniform uniform = uniforms[p_parameter];
		Vector<ShaderLanguage::ConstantNode::Value> default_value = uniform.default_value;
		return ShaderLanguage::constant_value_to_variant(default_value, uniform.type, uniform.array_size, uniform.hint);
	}
	return Variant();
}

RS::ShaderNativeSourceCode Fog::FogShaderData::get_native_source_code() const {
	Fog *fog_singleton = Fog::get_singleton();

	return fog_singleton->volumetric_fog.shader.version_get_native_source_code(version);
}

Fog::FogShaderData::~FogShaderData() {
	Fog *fog_singleton = Fog::get_singleton();
	ERR_FAIL_COND(!fog_singleton);
	//pipeline variants will clear themselves if shader is gone
	if (version.is_valid()) {
		fog_singleton->volumetric_fog.shader.version_free(version);
	}
}

////////////////////////////////////////////////////////////////////////////////
// Volumetric Fog

Fog::VolumetricFog::VolumetricFog(const Vector3i &fog_size, RID p_sky_shader) {
	width = fog_size.x;
	height = fog_size.y;
	depth = fog_size.z;

	RD::TextureFormat tf;
	tf.format = RD::DATA_FORMAT_R16G16B16A16_SFLOAT;
	tf.width = fog_size.x;
	tf.height = fog_size.y;
	tf.depth = fog_size.z;
	tf.texture_type = RD::TEXTURE_TYPE_3D;
	tf.usage_bits = RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_CAN_COPY_FROM_BIT;

	light_density_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(light_density_map, "Fog light-density map");

	tf.usage_bits = RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_COPY_TO_BIT;

	prev_light_density_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(prev_light_density_map, "Fog previous light-density map");
	RD::get_singleton()->texture_clear(prev_light_density_map, Color(0, 0, 0, 0), 0, 1, 0, 1);

	tf.usage_bits = RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_SAMPLING_BIT;

	fog_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(fog_map, "Fog map");

#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
	Vector<uint8_t> dm;
	dm.resize(fog_size.x * fog_size.y * fog_size.z * 4);
	dm.fill(0);

	density_map = RD::get_singleton()->storage_buffer_create(dm.size(), dm);
	RD::get_singleton()->set_resource_name(density_map, "Fog density map");
	light_map = RD::get_singleton()->storage_buffer_create(dm.size(), dm);
	RD::get_singleton()->set_resource_name(light_map, "Fog light map");
	emissive_map = RD::get_singleton()->storage_buffer_create(dm.size(), dm);
	RD::get_singleton()->set_resource_name(emissive_map, "Fog emissive map");
#else
	tf.format = RD::DATA_FORMAT_R32_UINT;
	tf.usage_bits = RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_CAN_COPY_TO_BIT;
	density_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(density_map, "Fog density map");
	RD::get_singleton()->texture_clear(density_map, Color(0, 0, 0, 0), 0, 1, 0, 1);
	light_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(light_map, "Fog light map");
	RD::get_singleton()->texture_clear(light_map, Color(0, 0, 0, 0), 0, 1, 0, 1);
	emissive_map = RD::get_singleton()->texture_create(tf, RD::TextureView());
	RD::get_singleton()->set_resource_name(emissive_map, "Fog emissive map");
	RD::get_singleton()->texture_clear(emissive_map, Color(0, 0, 0, 0), 0, 1, 0, 1);
#endif

	Vector<RD::Uniform> uniforms;
	{
		RD::Uniform u;
		u.binding = 0;
		u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
		u.append_id(fog_map);
		uniforms.push_back(u);
	}

	sky_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, p_sky_shader, RendererRD::SkyRD::SKY_SET_FOG);
}

Fog::VolumetricFog::~VolumetricFog() {
	RD::get_singleton()->free(prev_light_density_map);
	RD::get_singleton()->free(light_density_map);
	RD::get_singleton()->free(fog_map);
	RD::get_singleton()->free(density_map);
	RD::get_singleton()->free(light_map);
	RD::get_singleton()->free(emissive_map);

	if (fog_uniform_set.is_valid() && RD::get_singleton()->uniform_set_is_valid(fog_uniform_set)) {
		RD::get_singleton()->free(fog_uniform_set);
	}
	if (process_uniform_set_density.is_valid() && RD::get_singleton()->uniform_set_is_valid(process_uniform_set_density)) {
		RD::get_singleton()->free(process_uniform_set_density);
	}
	if (process_uniform_set.is_valid() && RD::get_singleton()->uniform_set_is_valid(process_uniform_set)) {
		RD::get_singleton()->free(process_uniform_set);
	}
	if (process_uniform_set2.is_valid() && RD::get_singleton()->uniform_set_is_valid(process_uniform_set2)) {
		RD::get_singleton()->free(process_uniform_set2);
	}
	if (sdfgi_uniform_set.is_valid() && RD::get_singleton()->uniform_set_is_valid(sdfgi_uniform_set)) {
		RD::get_singleton()->free(sdfgi_uniform_set);
	}
	if (sky_uniform_set.is_valid() && RD::get_singleton()->uniform_set_is_valid(sky_uniform_set)) {
		RD::get_singleton()->free(sky_uniform_set);
	}
}

Vector3i Fog::_point_get_position_in_froxel_volume(const Vector3 &p_point, float fog_end, const Vector2 &fog_near_size, const Vector2 &fog_far_size, float volumetric_fog_detail_spread, const Vector3 &fog_size, const Transform3D &p_cam_transform) {
	Vector3 view_position = p_cam_transform.affine_inverse().xform(p_point);
	view_position.z = MIN(view_position.z, -0.01); // Clamp to the front of camera
	Vector3 fog_position = Vector3(0, 0, 0);

	view_position.y = -view_position.y;
	fog_position.z = -view_position.z / fog_end;
	fog_position.x = (view_position.x / (2 * (fog_near_size.x * (1.0 - fog_position.z) + fog_far_size.x * fog_position.z))) + 0.5;
	fog_position.y = (view_position.y / (2 * (fog_near_size.y * (1.0 - fog_position.z) + fog_far_size.y * fog_position.z))) + 0.5;
	fog_position.z = Math::pow(float(fog_position.z), float(1.0 / volumetric_fog_detail_spread));
	fog_position = fog_position * fog_size - Vector3(0.5, 0.5, 0.5);

	fog_position.x = CLAMP(fog_position.x, 0.0, fog_size.x);
	fog_position.y = CLAMP(fog_position.y, 0.0, fog_size.y);
	fog_position.z = CLAMP(fog_position.z, 0.0, fog_size.z);

	return Vector3i(fog_position);
}

void Fog::volumetric_fog_update(const VolumetricFogSettings &p_settings, const Projection &p_cam_projection, const Transform3D &p_cam_transform, const Transform3D &p_prev_cam_inv_transform, RID p_shadow_atlas, int p_directional_light_count, bool p_use_directional_shadows, int p_positional_light_count, int p_voxel_gi_count, const PagedArray<RID> &p_fog_volumes) {
	RendererRD::TextureStorage *texture_storage = RendererRD::TextureStorage::get_singleton();
	RendererRD::MaterialStorage *material_storage = RendererRD::MaterialStorage::get_singleton();

	RENDER_TIMESTAMP("> Volumetric Fog");
	RD::get_singleton()->draw_command_begin_label("Volumetric Fog");

	if (p_fog_volumes.size() > 0) {
		RD::get_singleton()->draw_command_begin_label("Render Volumetric Fog Volumes");

		RENDER_TIMESTAMP("Render FogVolumes");

		VolumetricFogShader::VolumeUBO params;

		Vector2 frustum_near_size = p_cam_projection.get_viewport_half_extents();
		Vector2 frustum_far_size = p_cam_projection.get_far_plane_half_extents();
		float z_near = p_cam_projection.get_z_near();
		float z_far = p_cam_projection.get_z_far();
		float fog_end = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_length(p_settings.env);

		Vector2 fog_far_size = frustum_near_size.lerp(frustum_far_size, (fog_end - z_near) / (z_far - z_near));
		Vector2 fog_near_size;
		if (p_cam_projection.is_orthogonal()) {
			fog_near_size = fog_far_size;
		} else {
			fog_near_size = Vector2();
		}

		params.fog_frustum_size_begin[0] = fog_near_size.x;
		params.fog_frustum_size_begin[1] = fog_near_size.y;

		params.fog_frustum_size_end[0] = fog_far_size.x;
		params.fog_frustum_size_end[1] = fog_far_size.y;

		params.fog_frustum_end = fog_end;
		params.z_near = z_near;
		params.z_far = z_far;
		params.time = p_settings.time;

		params.fog_volume_size[0] = p_settings.vfog->width;
		params.fog_volume_size[1] = p_settings.vfog->height;
		params.fog_volume_size[2] = p_settings.vfog->depth;

		params.use_temporal_reprojection = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection(p_settings.env);
		params.temporal_frame = RSG::rasterizer->get_frame_number() % VolumetricFog::MAX_TEMPORAL_FRAMES;
		params.detail_spread = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_detail_spread(p_settings.env);
		params.temporal_blend = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection_amount(p_settings.env);

		Transform3D to_prev_cam_view = p_prev_cam_inv_transform * p_cam_transform;
		RendererRD::MaterialStorage::store_transform(to_prev_cam_view, params.to_prev_view);
		RendererRD::MaterialStorage::store_transform(p_cam_transform, params.transform);

		RD::get_singleton()->buffer_update(volumetric_fog.volume_ubo, 0, sizeof(VolumetricFogShader::VolumeUBO), &params, RD::BARRIER_MASK_COMPUTE);

		if (p_settings.vfog->fog_uniform_set.is_null() || !RD::get_singleton()->uniform_set_is_valid(p_settings.vfog->fog_uniform_set)) {
			Vector<RD::Uniform> uniforms;

			{
				RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
				u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
				u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
				u.binding = 1;
				u.append_id(p_settings.vfog->emissive_map);
				uniforms.push_back(u);
			}

			{
				RD::Uniform u;
				u.uniform_type = RD::UNIFORM_TYPE_UNIFORM_BUFFER;
				u.binding = 2;
				u.append_id(volumetric_fog.volume_ubo);
				uniforms.push_back(u);
			}

			{
				RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
				u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
				u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
				u.binding = 3;
				u.append_id(p_settings.vfog->density_map);
				uniforms.push_back(u);
			}

			{
				RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
				u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
				u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
				u.binding = 4;
				u.append_id(p_settings.vfog->light_map);
				uniforms.push_back(u);
			}

			p_settings.vfog->fog_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.default_shader_rd, VolumetricFogShader::FogSet::FOG_SET_UNIFORMS);
		}

		RD::ComputeListID compute_list = RD::get_singleton()->compute_list_begin();
		bool any_uses_time = false;

		for (int i = 0; i < (int)p_fog_volumes.size(); i++) {
			FogVolumeInstance *fog_volume_instance = fog_volume_instance_owner.get_or_null(p_fog_volumes[i]);
			ERR_FAIL_COND(!fog_volume_instance);
			RID fog_volume = fog_volume_instance->volume;

			RID fog_material = RendererRD::Fog::get_singleton()->fog_volume_get_material(fog_volume);

			FogMaterialData *material = nullptr;

			if (fog_material.is_valid()) {
				material = static_cast<FogMaterialData *>(material_storage->material_get_data(fog_material, RendererRD::MaterialStorage::SHADER_TYPE_FOG));
				if (!material || !material->shader_data->valid) {
					material = nullptr;
				}
			}

			if (!material) {
				fog_material = volumetric_fog.default_material;
				material = static_cast<FogMaterialData *>(material_storage->material_get_data(fog_material, RendererRD::MaterialStorage::SHADER_TYPE_FOG));
			}

			ERR_FAIL_COND(!material);

			FogShaderData *shader_data = material->shader_data;

			ERR_FAIL_COND(!shader_data);

			any_uses_time |= shader_data->uses_time;

			Vector3i min = Vector3i();
			Vector3i max = Vector3i();
			Vector3i kernel_size = Vector3i();

			Vector3 position = fog_volume_instance->transform.get_origin();
			RS::FogVolumeShape volume_type = RendererRD::Fog::get_singleton()->fog_volume_get_shape(fog_volume);
			Vector3 extents = RendererRD::Fog::get_singleton()->fog_volume_get_extents(fog_volume);

			if (volume_type != RS::FOG_VOLUME_SHAPE_WORLD) {
				// Local fog volume.
				Vector3i points[8];
				Vector3 fog_size = Vector3(p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);
				float volumetric_fog_detail_spread = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_detail_spread(p_settings.env);
				points[0] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(extents.x, extents.y, extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[1] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(-extents.x, extents.y, extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[2] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(extents.x, -extents.y, extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[3] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(-extents.x, -extents.y, extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[4] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(extents.x, extents.y, -extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[5] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(-extents.x, extents.y, -extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[6] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(extents.x, -extents.y, -extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);
				points[7] = _point_get_position_in_froxel_volume(fog_volume_instance->transform.xform(Vector3(-extents.x, -extents.y, -extents.z)), fog_end, fog_near_size, fog_far_size, volumetric_fog_detail_spread, fog_size, p_cam_transform);

				min = Vector3i(int32_t(p_settings.vfog->width) - 1, int32_t(p_settings.vfog->height) - 1, int32_t(p_settings.vfog->depth) - 1);
				max = Vector3i(1, 1, 1);

				for (int j = 0; j < 8; j++) {
					min = Vector3i(MIN(min.x, points[j].x), MIN(min.y, points[j].y), MIN(min.z, points[j].z));
					max = Vector3i(MAX(max.x, points[j].x), MAX(max.y, points[j].y), MAX(max.z, points[j].z));
				}

				kernel_size = max - min;
			} else {
				// Volume type global runs on all cells
				extents = Vector3(p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);
				min = Vector3i(0, 0, 0);
				kernel_size = Vector3i(int32_t(p_settings.vfog->width), int32_t(p_settings.vfog->height), int32_t(p_settings.vfog->depth));
			}

			if (kernel_size.x == 0 || kernel_size.y == 0 || kernel_size.z == 0) {
				continue;
			}

			VolumetricFogShader::FogPushConstant push_constant;
			push_constant.position[0] = position.x;
			push_constant.position[1] = position.y;
			push_constant.position[2] = position.z;
			push_constant.extents[0] = extents.x;
			push_constant.extents[1] = extents.y;
			push_constant.extents[2] = extents.z;
			push_constant.corner[0] = min.x;
			push_constant.corner[1] = min.y;
			push_constant.corner[2] = min.z;
			push_constant.shape = uint32_t(RendererRD::Fog::get_singleton()->fog_volume_get_shape(fog_volume));
			RendererRD::MaterialStorage::store_transform(fog_volume_instance->transform.affine_inverse(), push_constant.transform);

			RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, shader_data->pipeline);

			RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->fog_uniform_set, VolumetricFogShader::FogSet::FOG_SET_UNIFORMS);
			RD::get_singleton()->compute_list_set_push_constant(compute_list, &push_constant, sizeof(VolumetricFogShader::FogPushConstant));
			RD::get_singleton()->compute_list_bind_uniform_set(compute_list, volumetric_fog.base_uniform_set, VolumetricFogShader::FogSet::FOG_SET_BASE);
			if (material->uniform_set.is_valid() && RD::get_singleton()->uniform_set_is_valid(material->uniform_set)) { // Material may not have a uniform set.
				RD::get_singleton()->compute_list_bind_uniform_set(compute_list, material->uniform_set, VolumetricFogShader::FogSet::FOG_SET_MATERIAL);
			}

			RD::get_singleton()->compute_list_dispatch_threads(compute_list, kernel_size.x, kernel_size.y, kernel_size.z);
		}
		if (any_uses_time || RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection(p_settings.env)) {
			RenderingServerDefault::redraw_request();
		}

		RD::get_singleton()->draw_command_end_label();

		RD::get_singleton()->compute_list_end();
	}

	if (p_settings.vfog->process_uniform_set_density.is_null() || !RD::get_singleton()->uniform_set_is_valid(p_settings.vfog->process_uniform_set_density)) {
		//re create uniform set if needed
		Vector<RD::Uniform> uniforms;
		Vector<RD::Uniform> copy_uniforms;

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
			u.binding = 1;
			if (p_settings.shadow_atlas_depth.is_null()) {
				u.append_id(texture_storage->texture_rd_get_default(RendererRD::TextureStorage::DEFAULT_RD_TEXTURE_BLACK));
			} else {
				u.append_id(p_settings.shadow_atlas_depth);
			}

			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
			u.binding = 2;
			if (p_settings.directional_shadow_depth.is_valid()) {
				u.append_id(p_settings.directional_shadow_depth);
			} else {
				u.append_id(texture_storage->texture_rd_get_default(RendererRD::TextureStorage::DEFAULT_RD_TEXTURE_BLACK));
			}
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
			u.binding = 3;
			u.append_id(p_settings.omni_light_buffer);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}
		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
			u.binding = 4;
			u.append_id(p_settings.spot_light_buffer);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_UNIFORM_BUFFER;
			u.binding = 5;
			u.append_id(p_settings.directional_light_buffer);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
			u.binding = 6;
			u.append_id(p_settings.cluster_builder->get_cluster_buffer());
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_SAMPLER;
			u.binding = 7;
			u.append_id(material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED));
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
			u.binding = 8;
			u.append_id(p_settings.vfog->light_density_map);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
			u.binding = 9;
			u.append_id(p_settings.vfog->fog_map);
			uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
			u.binding = 9;
			u.append_id(p_settings.vfog->prev_light_density_map);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_SAMPLER;
			u.binding = 10;
			u.append_id(p_settings.shadow_sampler);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_UNIFORM_BUFFER;
			u.binding = 11;
			u.append_id(p_settings.voxel_gl_buffer);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
			u.binding = 12;
			for (int i = 0; i < RendererRD::GI::MAX_VOXEL_GI_INSTANCES; i++) {
				u.append_id(p_settings.rbgi->voxel_gi_textures[i]);
			}
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}
		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_SAMPLER;
			u.binding = 13;
			u.append_id(material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR_WITH_MIPMAPS, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED));
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}
		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_UNIFORM_BUFFER;
			u.binding = 14;
			u.append_id(volumetric_fog.params_ubo);
			uniforms.push_back(u);
			copy_uniforms.push_back(u);
		}
		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
			u.binding = 15;
			u.append_id(p_settings.vfog->prev_light_density_map);
			uniforms.push_back(u);
		}
		{
			RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
			u.binding = 16;
			u.append_id(p_settings.vfog->density_map);
			uniforms.push_back(u);
		}
		{
			RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
			u.binding = 17;
			u.append_id(p_settings.vfog->light_map);
			uniforms.push_back(u);
		}

		{
			RD::Uniform u;
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
			u.uniform_type = RD::UNIFORM_TYPE_STORAGE_BUFFER;
#else
			u.uniform_type = RD::UNIFORM_TYPE_IMAGE;
#endif
			u.binding = 18;
			u.append_id(p_settings.vfog->emissive_map);
			uniforms.push_back(u);
		}

		{
			RD::Uniform u;
			u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
			u.binding = 19;
			RID radiance_texture = texture_storage->texture_rd_get_default(p_settings.is_using_radiance_cubemap_array ? RendererRD::TextureStorage::DEFAULT_RD_TEXTURE_CUBEMAP_ARRAY_BLACK : RendererRD::TextureStorage::DEFAULT_RD_TEXTURE_CUBEMAP_BLACK);
			RID sky_texture = RendererSceneRenderRD::get_singleton()->environment_get_sky(p_settings.env).is_valid() ? p_settings.sky->sky_get_radiance_texture_rd(RendererSceneRenderRD::get_singleton()->environment_get_sky(p_settings.env)) : RID();
			u.append_id(sky_texture.is_valid() ? sky_texture : radiance_texture);
			uniforms.push_back(u);
		}

		p_settings.vfog->copy_uniform_set = RD::get_singleton()->uniform_set_create(copy_uniforms, volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_COPY), 0);

		p_settings.vfog->process_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_FOG), 0);

		RID aux7 = uniforms.write[7].get_id(0);
		RID aux8 = uniforms.write[8].get_id(0);

		uniforms.write[7].set_id(0, aux8);
		uniforms.write[8].set_id(0, aux7);

		p_settings.vfog->process_uniform_set2 = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_FOG), 0);

		uniforms.remove_at(8);
		uniforms.write[7].set_id(0, aux7);
		p_settings.vfog->process_uniform_set_density = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_DENSITY), 0);
	}

	bool using_sdfgi = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_gi_inject(p_settings.env) > 0.0001 && RendererSceneRenderRD::get_singleton()->environment_get_sdfgi_enabled(p_settings.env) && (p_settings.sdfgi != nullptr);

	if (using_sdfgi) {
		if (p_settings.vfog->sdfgi_uniform_set.is_null() || !RD::get_singleton()->uniform_set_is_valid(p_settings.vfog->sdfgi_uniform_set)) {
			Vector<RD::Uniform> uniforms;

			{
				RD::Uniform u;
				u.uniform_type = RD::UNIFORM_TYPE_UNIFORM_BUFFER;
				u.binding = 0;
				u.append_id(p_settings.gi->sdfgi_ubo);
				uniforms.push_back(u);
			}

			{
				RD::Uniform u;
				u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
				u.binding = 1;
				u.append_id(p_settings.sdfgi->ambient_texture);
				uniforms.push_back(u);
			}

			{
				RD::Uniform u;
				u.uniform_type = RD::UNIFORM_TYPE_TEXTURE;
				u.binding = 2;
				u.append_id(p_settings.sdfgi->occlusion_texture);
				uniforms.push_back(u);
			}

			p_settings.vfog->sdfgi_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, volumetric_fog.process_shader.version_get_shader(volumetric_fog.process_shader_version, VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_DENSITY_WITH_SDFGI), 1);
		}
	}

	p_settings.vfog->length = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_length(p_settings.env);
	p_settings.vfog->spread = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_detail_spread(p_settings.env);

	VolumetricFogShader::ParamsUBO params;

	Vector2 frustum_near_size = p_cam_projection.get_viewport_half_extents();
	Vector2 frustum_far_size = p_cam_projection.get_far_plane_half_extents();
	float z_near = p_cam_projection.get_z_near();
	float z_far = p_cam_projection.get_z_far();
	float fog_end = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_length(p_settings.env);

	Vector2 fog_far_size = frustum_near_size.lerp(frustum_far_size, (fog_end - z_near) / (z_far - z_near));
	Vector2 fog_near_size;
	if (p_cam_projection.is_orthogonal()) {
		fog_near_size = fog_far_size;
	} else {
		fog_near_size = Vector2();
	}

	params.fog_frustum_size_begin[0] = fog_near_size.x;
	params.fog_frustum_size_begin[1] = fog_near_size.y;

	params.fog_frustum_size_end[0] = fog_far_size.x;
	params.fog_frustum_size_end[1] = fog_far_size.y;

	params.ambient_inject = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_ambient_inject(p_settings.env) * RendererSceneRenderRD::get_singleton()->environment_get_ambient_light_energy(p_settings.env);
	params.z_far = z_far;

	params.fog_frustum_end = fog_end;

	Color ambient_color = RendererSceneRenderRD::get_singleton()->environment_get_ambient_light(p_settings.env).srgb_to_linear();
	params.ambient_color[0] = ambient_color.r;
	params.ambient_color[1] = ambient_color.g;
	params.ambient_color[2] = ambient_color.b;
	params.sky_contribution = RendererSceneRenderRD::get_singleton()->environment_get_ambient_sky_contribution(p_settings.env);

	params.fog_volume_size[0] = p_settings.vfog->width;
	params.fog_volume_size[1] = p_settings.vfog->height;
	params.fog_volume_size[2] = p_settings.vfog->depth;

	params.directional_light_count = p_directional_light_count;

	Color emission = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_emission(p_settings.env).srgb_to_linear();
	params.base_emission[0] = emission.r * RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_emission_energy(p_settings.env);
	params.base_emission[1] = emission.g * RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_emission_energy(p_settings.env);
	params.base_emission[2] = emission.b * RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_emission_energy(p_settings.env);
	params.base_density = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_density(p_settings.env);

	Color base_scattering = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_scattering(p_settings.env).srgb_to_linear();
	params.base_scattering[0] = base_scattering.r;
	params.base_scattering[1] = base_scattering.g;
	params.base_scattering[2] = base_scattering.b;
	params.phase_g = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_anisotropy(p_settings.env);

	params.detail_spread = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_detail_spread(p_settings.env);
	params.gi_inject = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_gi_inject(p_settings.env);

	params.cam_rotation[0] = p_cam_transform.basis[0][0];
	params.cam_rotation[1] = p_cam_transform.basis[1][0];
	params.cam_rotation[2] = p_cam_transform.basis[2][0];
	params.cam_rotation[3] = 0;
	params.cam_rotation[4] = p_cam_transform.basis[0][1];
	params.cam_rotation[5] = p_cam_transform.basis[1][1];
	params.cam_rotation[6] = p_cam_transform.basis[2][1];
	params.cam_rotation[7] = 0;
	params.cam_rotation[8] = p_cam_transform.basis[0][2];
	params.cam_rotation[9] = p_cam_transform.basis[1][2];
	params.cam_rotation[10] = p_cam_transform.basis[2][2];
	params.cam_rotation[11] = 0;
	params.filter_axis = 0;
	params.max_voxel_gi_instances = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_gi_inject(p_settings.env) > 0.001 ? p_voxel_gi_count : 0;
	params.temporal_frame = RSG::rasterizer->get_frame_number() % VolumetricFog::MAX_TEMPORAL_FRAMES;

	Transform3D to_prev_cam_view = p_prev_cam_inv_transform * p_cam_transform;
	RendererRD::MaterialStorage::store_transform(to_prev_cam_view, params.to_prev_view);

	params.use_temporal_reprojection = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection(p_settings.env);
	params.temporal_blend = RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection_amount(p_settings.env);

	{
		uint32_t cluster_size = p_settings.cluster_builder->get_cluster_size();
		params.cluster_shift = get_shift_from_power_of_2(cluster_size);

		uint32_t cluster_screen_width = (p_settings.rb_size.x - 1) / cluster_size + 1;
		uint32_t cluster_screen_height = (p_settings.rb_size.y - 1) / cluster_size + 1;
		params.max_cluster_element_count_div_32 = p_settings.max_cluster_elements / 32;
		params.cluster_type_size = cluster_screen_width * cluster_screen_height * (params.max_cluster_element_count_div_32 + 32);
		params.cluster_width = cluster_screen_width;

		params.screen_size[0] = p_settings.rb_size.x;
		params.screen_size[1] = p_settings.rb_size.y;
	}

	Basis sky_transform = RendererSceneRenderRD::get_singleton()->environment_get_sky_orientation(p_settings.env);
	sky_transform = sky_transform.inverse() * p_cam_transform.basis;
	RendererRD::MaterialStorage::store_transform_3x3(sky_transform, params.radiance_inverse_xform);

	RD::get_singleton()->draw_command_begin_label("Render Volumetric Fog");

	RENDER_TIMESTAMP("Render Fog");
	RD::get_singleton()->buffer_update(volumetric_fog.params_ubo, 0, sizeof(VolumetricFogShader::ParamsUBO), &params, RD::BARRIER_MASK_COMPUTE);

	RD::ComputeListID compute_list = RD::get_singleton()->compute_list_begin();

	RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, volumetric_fog.process_pipelines[using_sdfgi ? VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_DENSITY_WITH_SDFGI : VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_DENSITY]);

	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->process_uniform_set_density, 0);

	if (using_sdfgi) {
		RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->sdfgi_uniform_set, 1);
	}
	RD::get_singleton()->compute_list_dispatch_threads(compute_list, p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);
	RD::get_singleton()->compute_list_add_barrier(compute_list);

	// Copy fog to history buffer
	if (RendererSceneRenderRD::get_singleton()->environment_get_volumetric_fog_temporal_reprojection(p_settings.env)) {
		RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, volumetric_fog.process_pipelines[VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_COPY]);
		RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->copy_uniform_set, 0);
		RD::get_singleton()->compute_list_dispatch_threads(compute_list, p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);
		RD::get_singleton()->compute_list_add_barrier(compute_list);
	}
	RD::get_singleton()->draw_command_end_label();

	if (p_settings.volumetric_fog_filter_active) {
		RD::get_singleton()->draw_command_begin_label("Filter Fog");

		RENDER_TIMESTAMP("Filter Fog");

		RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, volumetric_fog.process_pipelines[VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_FILTER]);
		RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->process_uniform_set, 0);
		RD::get_singleton()->compute_list_dispatch_threads(compute_list, p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);

		RD::get_singleton()->compute_list_end();
		//need restart for buffer update

		params.filter_axis = 1;
		RD::get_singleton()->buffer_update(volumetric_fog.params_ubo, 0, sizeof(VolumetricFogShader::ParamsUBO), &params);

		compute_list = RD::get_singleton()->compute_list_begin();
		RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, volumetric_fog.process_pipelines[VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_FILTER]);
		RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->process_uniform_set2, 0);
		RD::get_singleton()->compute_list_dispatch_threads(compute_list, p_settings.vfog->width, p_settings.vfog->height, p_settings.vfog->depth);

		RD::get_singleton()->compute_list_add_barrier(compute_list);
		RD::get_singleton()->draw_command_end_label();
	}

	RENDER_TIMESTAMP("Integrate Fog");
	RD::get_singleton()->draw_command_begin_label("Integrate Fog");

	RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, volumetric_fog.process_pipelines[VolumetricFogShader::VOLUMETRIC_FOG_PROCESS_SHADER_FOG]);
	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, p_settings.vfog->process_uniform_set, 0);
	RD::get_singleton()->compute_list_dispatch_threads(compute_list, p_settings.vfog->width, p_settings.vfog->height, 1);

	RD::get_singleton()->compute_list_end(RD::BARRIER_MASK_RASTER);

	RENDER_TIMESTAMP("< Volumetric Fog");
	RD::get_singleton()->draw_command_end_label();
	RD::get_singleton()->draw_command_end_label();
}