${VFXPerPassInclude}
${VFXGeneratedBlockFunction}

struct vs_input
{
	VFX_DECLARE_INSTANCE_ID
};

#pragma vertex vert
VFX_VARYING_PS_INPUTS vert(uint id : SV_VertexID, vs_input i)
{
	VFX_VARYING_PS_INPUTS o = (VFX_VARYING_PS_INPUTS)0;

	UNITY_SETUP_INSTANCE_ID(i);
	UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);

	uint index = (id >> 2) + VFX_GET_INSTANCE_ID(i) * 2048;
	
	${VFXLoadAttributesOrCull}
	${VFXProcessBlocks}
	
	if (!attributes.alive)
		return o;
	
	o.VFX_VARYING_UV.x = float(id & 1) * 2.0f - 1.0f;
	o.VFX_VARYING_UV.y = float(id & 2) - 1.0f; 
	
	${VFXLoadSize}
	float uSize = size3.x * 0.5f;
	
	float camDist = length(GetViewVFXPosition() - attributes.position);
	float scale = 1.0f - (1.0f - unity_OrthoParams.w) * uSize / camDist;
	
	float3 vPos = attributes.position;
	vPos += attributes.axisX * (o.VFX_VARYING_UV.x * uSize * scale);
	vPos += attributes.axisY * (o.VFX_VARYING_UV.y * uSize * scale);
	vPos -= attributes.axisZ * uSize;
	
	#ifdef VFX_VARYING_SPHERECENTER
	o.VFX_VARYING_SPHERECENTER = TransformPositionVFXToWorld(attributes.position);
	#endif
	#ifdef VFX_VARYING_SPHERERADIUS
	o.VFX_VARYING_SPHERERADIUS = uSize;
	#endif
	
	o.VFX_VARYING_POSCS = TransformPositionVFXToClip(vPos);

	${VFXVertexCommonProcess}
	${VFXVertexAdditionalProcess}

	return o;
}

${VFXFragmentCommonFunctions}

void VFXClipSphereAndGetDepthOffsetAndNormal(out float depthOffset, out float3 normalWS ,VFX_VARYING_PS_INPUTS i)
{
	float lsqr = dot(i.VFX_VARYING_UV, i.VFX_VARYING_UV);
	clip(1.0f - lsqr);
		
	float nDepthOffset = 1.0f - sqrt(1.0f - lsqr); // normalized depth offset	
	
	float3 camToPosDir = normalize(i.VFX_VARYING_POSWS - VFXGetViewWorldPosition());
	float3 posWS = i.VFX_VARYING_POSWS + (camToPosDir * (nDepthOffset * i.VFX_VARYING_SPHERERADIUS));
	
	float4 posCS = VFXTransformPositionWorldToClip(posWS);
	depthOffset = posCS.z / posCS.w;
	
	normalWS = normalize(posWS - i.VFX_VARYING_SPHERECENTER);				
}

${VFXBegin:VFXVertexAdditionalProcess}${VFXEnd}