Program Listing for File SceneUBO.hpp

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// Host mirror of the scene UBO; BuildIntegrity.SharedStructOffsetsMatchTheCompiledSpirv pins its layout.
#pragma once
#include "common/HostDeviceGlmAliases.hpp"
#include "common/host_device_shared_vars.hpp"

#include <glm/gtc/matrix_transform.hpp>
namespace Kataglyphis::VulkanRendererInternals {

struct DirectionalLightData
{
    vec4 direction;
    vec4 color;// w = radiance
};

struct SceneUBO
{
    // Directional light
    DirectionalLightData dirLight;

    uint pcfRadius;
    float cascadedShadowIntensity;
    uint numCascades;

    // std140 aligns cascadeSplits to byte 48 on the GPU; glm's vec4 does not, so the pad is explicit.
    uint _pad_std140_0;

    // Cascaded shadow maps
    vec4 cascadeSplits;// up to 4 cascades
    static_assert(MAX_CASCADES <= 4, "cascadeSplits is a single vec4 - a fourth-plus cascade would write past its end");
    mat4 cascadeLightSpaceMatrices[MAX_CASCADES];

    // Camera: both .w are filler (SceneUboMarshal.hpp).
    vec4 view_dir;
    vec4 cam_pos;

    // Clouds: see docs/clouds.md § UBO packing.
    vec4 cloudLightMarch;
    vec4 cloudMeshScale;
    vec4 cloudMeshOffset;
    vec4 cloudParameters;
};
}// namespace Kataglyphis::VulkanRendererInternals