ModernPBRShaderUniforms.hpp

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#pragma once
 
#include <array>
#include <cstddef>
 
namespace monopoly::engine
{
    struct alignas(16) ModernPBRVertexUniforms
    {
        std::array<float, 16> worldViewProjection{};
        std::array<float, 16> world{};
    };
 
    struct alignas(16) ModernPBRFragmentUniforms
    {
        std::array<float, 4> baseColor{};
        // x: metallic, y: roughness, z: target already encodes sRGB, w: alpha mask.
        std::array<float, 4> metallicRoughness{};
        std::array<float, 4> emissiveStrength{};
        std::array<float, 4> cameraPosition{};
        // rgb: ambient/environment intensity; w: specular cubemap enabled (0/1).
        std::array<float, 4> sceneAmbient{};
        std::array<float, 4> boardReflectionColorEnabled{};
        std::array<float, 4> boardReflectionDirection{};
        std::array<float, 4> sunColorEnabled{};
        std::array<float, 4> sunDirection{};
        std::array<float, 4> spotlightColorEnabled{};
        std::array<float, 4> spotlightPositionRange{};
        std::array<float, 4> spotlightDirectionFalloff{};
        std::array<float, 4> spotlightAttenuationTheta{};
        std::array<float, 4> spotlightPhi{};
        // Enabled base-color, metallic-roughness, normal and emissive maps.
        std::array<float, 4> mapFlags{};
        // x: occlusion enabled, y: normal scale, z: occlusion strength, w: alpha cutoff.
        std::array<float, 4> mapParameters{};
        std::array<float, 16> shadowViewProjection{};
        // x: shadow receiver enabled (negative for depth pass), y: texel size,
        // z: depth comparison bias, w: optional presentation tone mapping.
        std::array<float, 4> shadowParameters{};
    };
    static_assert(sizeof(ModernPBRVertexUniforms) == 128U);
    static_assert(sizeof(ModernPBRFragmentUniforms) == 336U);
    static_assert(offsetof(ModernPBRFragmentUniforms, spotlightPhi) == 208U);
}