private static Vector3 GetNormal(Triangle triangle)
{
return(Vector3.Cross(triangle.V2 - triangle.V1, triangle.V3 - triangle.V1).normalized);
}
// Helpers
internal static Triangle Transform(Matrix4x4 matrix, Triangle triangle) {
var v1 = matrix.MultiplyPoint( triangle.V1 );
var v2 = matrix.MultiplyPoint( triangle.V2 );
var v3 = matrix.MultiplyPoint( triangle.V3 );
return new Triangle( v1, v2, v3 );
}
// Helpers
private static bool Filter(Triangle triangle, Decal decal)
{
var normal = GetNormal(triangle);
return(Vector3.Angle(Vector3.back, normal) <= decal.MaxAngle);
}