#include "Macros.fxh"

BEGIN_CONSTANTS

MATRIX_CONSTANTS

    float4x4 World             _vs(c0)             _cb(c0);
    float4x4 ViewProjection    _vs(c4)             _cb(c4);

END_CONSTANTS

struct VertexShaderInput
{
    float4 Position : POSITION;
};

struct VertexShaderOutput
{
    float4 Position : SV_POSITION;
    float Depth : DEPTH;
};

VertexShaderOutput main_vs(VertexShaderInput input)
{
    VertexShaderOutput output;

    float4x4 worldViewProjection = mul(World, ViewProjection);
    output.Position = mul(input.Position, worldViewProjection);
    output.Depth = output.Position.z / output.Position.w;

    return output;
}

float4 main_ps(VertexShaderOutput input) : SV_TARGET0
{
    return float4(input.Depth, 0.0, 0.0, 0.0);
}

Technique SimpleDepth
{
    Pass
    {
        VertexShader = compile vs_3_0 main_vs();
        PixelShader  = compile ps_3_0 main_ps();
    }
}