dwelling-2/Assets/Azure/Resources/ForegroundFiltDistShader.compute

#pragma kernel FgFiltDist

float4x4 _Transform;

//float Xmin;
//float Xmax;
//float Ymin;
//float Ymax;
//float Zmin;
//float Zmax;
float4 _PosMin;
float4 _PosMaxX;
float4 _PosMaxY;
//float4 _PosMaxZ;
float4 _PosMaxZLeft;
float4 _PosMaxZRight;
float4 _PosDot;

RWTexture2D<float4> _VertexTex;
RWTexture2D<float4> _AlphaTex;


[numthreads(8, 8, 1)]
void FgFiltDist(uint3 id : SV_DispatchThreadID)
{
	float4 vertex = _VertexTex[id.xy];
	float3 vpos = mul(_Transform, vertex).xyz;  // (float3)vertex;  // 
	bool mask = (vertex.a > 0.0); // && (vpos.y >= 0);

	//bool isInside = vpos.x >= Xmin && vpos.x <= Xmax && vpos.y >= Ymin && vpos.y <= Ymax && vpos.z >= Zmin && vpos.z <= Zmax;
	//mask = mask && isInside;

	float3 pmin = (float3)_PosMin;
	float3 pv = vpos - pmin;

	float3 px = (float3)_PosMaxX;
	float3 py = (float3)_PosMaxY;
	//float3 pz = (float3)_PosMaxZ;

	float3 pzl = (float3)_PosMaxZLeft;
	float3 pzr = (float3)_PosMaxZRight;

	float3 pz = (float3)lerp(pzr, pzl, pv.x / (_PosMaxX.x - pmin.x));

	float3 pdot = (float3)_PosDot;

	float dx = dot(pv, px);
	bool bx = dx >= 0.0 && dx <= pdot.x;

	float dy = dot(pv, py);
	bool by = dy >= 0.0 && dy <= pdot.y;

	float dz = dot(pv, pz);
	bool bz = dz >= 0.0 && dz <= pdot.z;

	mask = mask && bx && by && bz;
	//_VertexTex[id.xy] = float4(mask, mask, mask, mask);

	mask = mask * mask;  // make it positive
	_AlphaTex[id.xy] = float4(mask, mask, mask, mask);
}