重新导入obi

Assets/Obi/Resources/ObiMaterials/ObiParticles.cginc

@@ -0,0 +1,24 @@
+#ifndef OBIPARTICLES_INCLUDED
+#define OBIPARTICLES_INCLUDED
+
+float _RadiusScale;
+
+float3 BillboardSphereNormals(float2 texcoords)
+{
+	float3 n;
+	n.xy = texcoords*2.0-1.0;
+	float r2 = dot(n.xy, n.xy);
+	clip (1 - r2);   // clip pixels outside circle
+	n.z = sqrt(1.0 - r2);
+	return n;
+}
+
+float BillboardSphereThickness(float2 texcoords)
+{
+	float2 n = texcoords*2.0-1.0;
+	float r2 = dot(n.xy, n.xy);
+	clip (1 - r2);   // clip pixels outside circle
+	return sqrt(1.0 - r2)*2.0f*exp(-r2*2.0f);
+}
+
+#endif