#pragma target 4.5
#define UNITY_MATERIAL_LIT
#pragma multi_compile _ WRITE_NORMAL_BUFFER

struct ps_input
{
	SV_POSITION_QUALIFIERS float4 pos : SV_POSITION;
	float2 uv : TEXCOORD1;
	float4 posWS : TEXCOORD2;
	float4 sphereInfo : TEXCOORD3;

	UNITY_VERTEX_OUTPUT_STEREO

    VFX_VERTEX_OUTPUT_INSTANCE_INDEX
};

#define VFX_VARYING_PS_INPUTS ps_input
#define VFX_VARYING_POSCS pos
#define VFX_VARYING_UV uv
#define VFX_VARYING_POSWS posWS.xyz
#define VFX_VARYING_SPHERECENTER sphereInfo.xyz
#define VFX_VARYING_SPHERERADIUS sphereInfo.w

#ifdef WRITE_NORMAL_BUFFER
#define VFX_VARYING_SMOOTHNESS posWS.w
#endif

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

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

#if VFX_PASSDEPTH == VFX_PASSDEPTH_SELECTION
int _ObjectId;
int _PassValue;
#elif VFX_PASSDEPTH == VFX_PASSDEPTH_PICKING
float4 _SelectionID;
#endif

#pragma fragment frag
void frag(ps_input i
#if defined(WRITE_NORMAL_BUFFER) && VFX_PASSDEPTH == VFX_PASSDEPTH_ACTUAL
, out float4 outNormalBuffer : SV_Target0
#else
, out float4 outColor : SV_Target
#endif
, out float oDepth : DEPTH_OFFSET_SEMANTIC)
{
	UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
	VFXTransformPSInputs(i);
	float3 normalWS;
	VFXClipSphereAndGetDepthOffsetAndNormal(oDepth, normalWS, i);

#if VFX_PASSDEPTH == VFX_PASSDEPTH_SELECTION
	outColor = float4(_ObjectId, _PassValue, 1.0, 1.0);
#elif VFX_PASSDEPTH == VFX_PASSDEPTH_PICKING
	outColor = _SelectionID;
#elif VFX_PASSDEPTH == VFX_PASSDEPTH_ACTUAL
	#ifdef WRITE_NORMAL_BUFFER
		VFXUVData uvData = (VFXUVData)0;
		VFXComputePixelOutputToNormalBuffer(i,normalWS,uvData,outNormalBuffer);
	#else
		outColor = (float4)0;
	#endif
#else
	#error VFX_PASSDEPTH undefined
#endif
}