DirectionalLightComponent.hpp

#pragma once
 
#include "EngineCore/Reflection/ComponentReflection.hpp"
#include "EngineCore/ECS/Entity.hpp"
#include "Common/Math.hpp"
 
namespace Grindstone {
    class WorldContextSet;
 
    namespace GraphicsAPI {
        class Buffer;
        class DescriptorSet;
        class DescriptorSetLayout;
        class RenderPass;
        class Framebuffer;
        class Image;
    }
 
    struct DirectionalLightComponent {
        static constexpr size_t MAX_CASCADE_COUNT = 8;
        struct ShadowData {
            Grindstone::Math::Matrix4 shadowMatrix;
            Grindstone::Math::Rect2D shadowRenderArea;
        };
 
        struct UniformStruct {
            ShadowData shadowData[MAX_CASCADE_COUNT];
            float cascadeDistances[MAX_CASCADE_COUNT];
            Grindstone::Math::Matrix4 cameraViewMatrix;
            Math::Float3 color;
            uint32_t cascadeCount;
            Math::Float3 direction;
            float padding0; // padded for shaders.
            Math::Float3 eyePosForShadowing;
        };
 
        static void Construct(Grindstone::WorldContextSet& cxtSet, entt::entity);
        static void Destroy(Grindstone::WorldContextSet& cxtSet, entt::entity);
 
        glm::vec3 eyePosForShadowing;
        Grindstone::Math::Matrix4 debugCameraProjectionMatrix;
        Grindstone::Math::Matrix4 debugCameraViewMatrix;
        Grindstone::Math::Matrix4 debugShadowProjectionMatrix[8];
        Grindstone::Math::Matrix4 shadowProjectionMatrix[8];
        Grindstone::Math::Matrix4 shadowViewMatrix[8];
        Grindstone::Math::Matrix4 shadowProjViewMatrix[8];
        Grindstone::Math::Rect2D shadowRenderArea[8];
        float cascadeDistances[8];
        uint32_t cascadeCount = 4;
        Math::Float3 color = Math::Float3(1.0f, 1.0f, 1.0f);
        float intensity = 100.0f;
 
        GraphicsAPI::Buffer* uniformBufferObject = nullptr;
        GraphicsAPI::DescriptorSet* descriptorSet = nullptr;
        GraphicsAPI::DescriptorSetLayout* descriptorSetLayout = nullptr;
 
        GraphicsAPI::Buffer* shadowMapUniformBufferObjects[MAX_CASCADE_COUNT];
        GraphicsAPI::DescriptorSet* shadowMapDescriptorSets[MAX_CASCADE_COUNT];
        GraphicsAPI::DescriptorSetLayout* shadowMapDescriptorSetLayout = nullptr;
 
        REFLECT("DirectionalLight")
    };
}