/// <summary>
/// Contructs a point on the normal of a given surface at a given offset
/// </summary>
/// <param name="contextSurface">Input surface</param>
/// <param name="u">U parameter value</param>
/// <param name="v">V parameter value</param>
/// <param name="offset">Offset in the direction of normal</param>
/// <returns>Point</returns>
internal static Point AtParameter(Surface contextSurface, double u, double v, double offset)
{
if (contextSurface == null)
{
return(null);
}
var pt = contextSurface.PointAtParametersCore(ref u, ref v, offset);
if (null == pt)
{
return(null);
}
pt.Context = contextSurface;
pt.U = u;
pt.V = v;
pt.Distance = offset;
pt.Persist();
return(pt);
}
/// <summary>
/// Contructs a point on the normal of a given surface at a given offset
/// </summary>
/// <param name="contextSurface">Input surface</param>
/// <param name="u">U parameter value</param>
/// <param name="v">V parameter value</param>
/// <param name="offset">Offset in the direction of normal</param>
/// <returns>Point</returns>
internal static Point AtParameter(Surface contextSurface, double u, double v, double offset)
{
if (contextSurface == null)
return null;
var pt = contextSurface.PointAtParametersCore(ref u, ref v, offset);
if (null == pt)
return null;
pt.Context = contextSurface;
pt.U = u;
pt.V = v;
pt.Distance = offset;
pt.Persist();
return pt;
}
