// Forward pass
Pass
{
    Name "GBuffer"
	Tags { "LightMode"="GBuffer" }

    ${VFXStencilGBuffer}

	HLSLPROGRAM
	#pragma target 4.5

	#pragma multi_compile _ RENDERING_LAYERS
	#pragma multi_compile _ DEBUG_DISPLAY
	#pragma multi_compile _ PROBE_VOLUMES_L1 PROBE_VOLUMES_L2

	#define UNITY_MATERIAL_LIT

	${VFXIncludeRP("VFXLitVaryings.template")}

	struct ps_input
	{
		float4 pos : SV_POSITION;

		${VFXHDRPLitDeclareVaryings}

		#if USE_SOFT_PARTICLE || USE_ALPHA_TEST
		// x: inverse soft particles fade distance
		// y: alpha threshold
		nointerpolation float2 builtInInterpolants : TEXCOORD1;
		#endif

		float3 offsets : TEXCOORD3;
		nointerpolation float3 rotX : TEXCOORD4;
		nointerpolation float3 rotY : TEXCOORD5;

		#if HDRP_NEEDS_UVS
		nointerpolation uint faceID : TEXCOORD6;
		#endif

		UNITY_VERTEX_OUTPUT_STEREO
	};

	struct ps_output
	{
		float4 color : SV_Target0;
	};

${VFXHDRPLitVaryingsMacros}

#define VFX_VARYING_PS_INPUTS ps_input
#define VFX_VARYING_POSCS pos
#define VFX_VARYING_INVSOFTPARTICLEFADEDISTANCE builtInInterpolants.x
#define VFX_VARYING_ALPHATHRESHOLD builtInInterpolants.y
#define VFX_VARYING_OFFSETS offsets
#define VFX_VARYING_ROTX rotX
#define VFX_VARYING_ROTY rotY
#if HDRP_NEEDS_UVS
#define VFX_VARYING_FACEID faceID
#endif

${VFXBegin:VFXVertexAdditionalProcess}
${VFXHDRPLitFillVaryings}
${VFXEnd}

	${VFXInclude("Shaders/ParticleHexahedron/Pass.template")}
	#define SHADERPASS SHADERPASS_GBUFFER
	${VFXIncludeRP("VFXLit.template")}

	#pragma fragment frag
	void frag(ps_input i, OUTPUT_GBUFFER(outGBuffer)
#if USE_DOUBLE_SIDED
	, bool frontFace : SV_IsFrontFace
#endif
	)
	{
		UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
		VFXTransformPSInputs(i);
		VFX_FRAG_SETUP_INSTANCE_ID(i);

    #if VFX_USE_GRAPH_VALUES
       uint instanceActiveIndex = i.VFX_VARYINGS_INSTANCE_ACTIVE_INDEX;
       ${VFXLoadGraphValues}
    #endif

#if !USE_DOUBLE_SIDED
		const bool frontFace = true;
#endif
		const float faceMul = frontFace ? 1.0f : -1.0f;

		float3 normalWS;
		const VFXUVData uvData = GetUVData(i,VFXCubeGetUV(i));

		#if USE_NORMAL_MAP
		float3 n = SampleNormalMap(VFX_SAMPLER(normalMap),uvData);
		normalWS = VFXCubeTransformNormalTS(i,n,frontFace);
		normalWS = lerp(VFXCubeGetLocalNormal(i) * faceMul,normalWS,i.materialProperties.z);
		#else
		normalWS = VFXCubeGetLocalNormal(i) * faceMul;
		#endif
		normalWS = VFXCubeTransformNormalWS(i,normalWS);
		normalWS = normalize(normalWS);

		VFXComputePixelOutputToGBuffer(i,normalWS,uvData,outGBuffer);

	}
	ENDHLSL
}