port from perforce

meshToolsV5/src/Interop/MeshVertexShader.hlsl

@@ -0,0 +1,35 @@
+cbuffer cb0 : register (b0)
+{
+	float aspectRatio;
+	float distanceToCenter;
+	float dummy2;
+	float dummy3;
+	float4x4 modelRotation;
+	float4 pivot;
+}
+
+float4x4 getProjMatrix()
+{
+	float yScale = 2.4142135623730950488016887242097;//cot(fovY/2)
+	float xScale = yScale / aspectRatio;
+	float n = 0.1f;
+	float f = 100.0f;
+	float4x4 proj =
+	{
+		xScale,	0,		0,			0,
+		0,		yScale,	0,			0,
+		0,		0,		f/(f-n),	1,
+		0,		0,		-n*f/(f-n),	0
+	};
+	return proj;
+}
+
+void main(in float3 pos : POSITION, out float4 result : SV_POSITION, inout float3 normal : NORMAL, inout float4 uv : TEXCOORD)
+{
+	float4 v = float4(pos, 1);
+	v.xyz -= pivot.xyz;
+	v = mul(v, modelRotation);
+	v.z += distanceToCenter;
+	v = mul(v, getProjMatrix());
+	result = v;
+}