struct VertexData
{
    float4 Normal;
    float2 TexCoord0;
    float2 TexCoord1;
    float4 Color0;
};

struct TransformData
{
    float4x4 Transform;
    float4x4 NormalTransform;
};

struct MaterialData
{
    float AlbedoFactor[4];
    float EmissionFactor[3];
    float MetalFactor;
    float RoughFactor;
    uint AlbedoTex;
    uint NormalTex;
    uint MetalRoughTex;
    uint OcclusionTex;
    uint EmissionTex;
};

struct Block
{
    uint VertexBufferHandle;
    uint VertexDataHandle;
    uint MaterialBufferHandle;
    uint NodeBufferHandle;
    uint LightHandle;
    uint PointLightIndexer;
    uint DirectionalLightIndexer;
    int MaterialIdx;
    uint NodeIdx;
};

struct PointLight
{
    float Position[3];
    float Range;
    uint Color;
    float Intensity;
};

struct DirectionalLight
{
    float Direction[3];
    float Validity_;
    uint Color;
    float Intensity;
};

struct CameraData
{
    float4x4 View;
    float4x4 Projection;
    float4 Position;
};

// Little Endian storage. First short is least significant.
#define IndexerCount(Indexer) (Indexer & 0xFFFF)            
#define IndexerOffset(Indexer) ((Indexer & 0xFFFF0000) >> 16);

#define INVALID_HANDLE 0xFFFFFFFF

static const float PI = 3.14159265f;

[[vk::binding(0, 0)]] StructuredBuffer<float4> VertexBuffer[];
[[vk::binding(0, 0)]] StructuredBuffer<VertexData> VertexDataBuffer[];
[[vk::binding(0, 0)]] StructuredBuffer<MaterialData> MaterialsBuffer[];
[[vk::binding(0, 0)]] StructuredBuffer<TransformData> NodeBuffer[];
[[vk::binding(0, 0)]] StructuredBuffer<PointLight> PointLightBuffer[];
[[vk::binding(0, 0)]] StructuredBuffer<DirectionalLight> DirectionalLightBuffer[];

[[vk::binding(1, 0)]] Texture2D<float4> Textures[];
[[vk::binding(1, 0)]] SamplerState ImmutableSamplers[];

[[vk::binding(0, 1)]] ConstantBuffer<CameraData> Camera;

[[vk::push_constant]]
Block PushConstant;