/// <summary>
/// Performs the inverse of the projection done by <see cref="Sample"/>
/// </summary>
/// <param name="point">A point on the surface of this mesh</param>
/// <returns>The primary sample space point that would have been projected there</returns>
public Vector2 SampleInverse(SurfacePoint point)
{
var local = SampleWarp.FromUniformTriangle(point.BarycentricCoords);
float x = triangleDistribution.SampleInverse((int)point.PrimId, local.X);
return(new(x, local.Y));
}
/// <returns>The surface area pdf of sampling the given point on the surface of this mesh.</returns>
public float Pdf(SurfacePoint point)
{
return(1.0f / SurfaceArea);
}
