WaterPlanarReflection.h

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#pragma once
 
#include "common/Result.h"
 
#include <array>
#include <cstdint>
 
#include <glm/glm.hpp>
 
namespace ssq { class Table; }
 
namespace eve::graphics {
 
enum class WaterReflectionResolution : std::uint8_t { Full = 0, Half = 1, Third = 2, Quarter = 3 };
 
struct WaterPlanarReflectionSettings {
    bool enabled = true;
    bool disableSkyboxReflections = false;
    WaterReflectionResolution resolutionMultiplier = WaterReflectionResolution::Half;
    float clipPlaneOffset = 0.0F;
    std::uint32_t reflectLayers = 0xffffffffU;
    bool shadows = false;
    bool enableRenderDistance = false;
    bool enablePerLayerDistances = false;
    float customRenderDistance = 500.0F;
    float lodBias = 1.0F;
    std::array<float, 32> customRenderDistances{};
    int textureResolution = 512;
};
 
struct WaterPlanarReflectionInput {
    glm::vec3 cameraPosition{};
    glm::vec3 cameraForward{0.0F, 0.0F, -1.0F};
    float waterPlaneY = 0.0F;
    float renderScale = 1.0F;
    bool orthographic = false;
    bool reflectionOrPreviewCamera = false;
};
 
struct WaterPlanarReflectionPlan {
    glm::mat4 reflectionMatrix{1.0F};
    glm::vec3 cameraPosition{};
    glm::vec3 cameraForward{0.0F, 0.0F, -1.0F};
    glm::vec4 worldClipPlane{0.0F, 1.0F, 0.0F, 0.0F};
    std::array<float, 32> layerCullDistances{};
    std::uint32_t cullingMask = 0;
    int textureWidth = 0;
    int textureHeight = 0;
    bool renderShadows = false;
    bool shouldRender = false;
};
 
[[nodiscard]] EVENGINE_API_BACKENDS Result<WaterPlanarReflectionPlan> buildWaterPlanarReflectionPlan(
    const WaterPlanarReflectionSettings& settings, const WaterPlanarReflectionInput& input);
 
EVENGINE_API_BACKENDS void exposeWaterPlanarReflectionBindings(ssq::Table& table);
 
}  // namespace eve::graphics