Shader "Custom/InstancedIndirectColor"
{
    SubShader
    {
        Tags
        {
            "RenderType" = "Opaque"
        }

        Pass
        {
            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/RenderPass/CustomPass/CustomPassCommon.hlsl"

            struct appdata_t
            {
                float4 vertex : POSITION;
                half4 color : COLOR;
            };

            struct v2f
            {
                float4 vertex : SV_POSITION;
                float4 color : COLOR;
            };

            struct MeshProperties
            {
                float4x4 mat;
                float4 color;
            };

            StructuredBuffer<MeshProperties> _Properties;

            v2f vert(appdata_t i, uint instanceID: SV_InstanceID)
            {
                v2f o;

                const MeshProperties properties = _Properties[instanceID];
                float4 pos = mul(properties.mat, i.vertex);
                float4 worldPos = mul(UNITY_MATRIX_M, pos);
                o.vertex = mul(UNITY_MATRIX_VP, worldPos);
                o.color = properties.color;

                return o;
            }

            half4 frag(v2f i) : SV_Target
            {
                return i.color;
            }
            ENDHLSL
        }
    }
}