/// <summary>
/// Converts a point on the passed in UIElement to the corresponding
/// texture coordinate for that point. The function assumes (0, 0)
/// is the upper-left texture coordinate and (1,1) is the lower-right.
/// </summary>
/// <param name="pt">The 2D point on the passed in UIElement to convert</param>
/// <param name="visual">The UIElement whose coordinate system is being used</param>
/// <returns>
/// The texture coordinate corresponding to the 2D point on the passed in UIElement
/// </returns>
internal static Point VisualCoordsToTextureCoords(Point pt, Visual visual)
{
return VisualCoordsToTextureCoords(pt, visual.CalculateSubgraphRenderBoundsOuterSpace());
}
/// <summary>
/// Converts a point given in texture coordinates to the corresponding
/// 2D point on the UIElement passed in.
/// </summary>
/// <param name="uv">The texture coordinate to convert</param>
/// <param name="visual">The UIElement whose coordinate system is to be used</param>
/// <returns>
/// The 2D point on the passed in UIElement cooresponding to the
/// passed in texture coordinate.
/// </returns>
internal static Point TextureCoordsToVisualCoords(Point uv, Visual visual)
{
return TextureCoordsToVisualCoords(uv, visual.CalculateSubgraphRenderBoundsOuterSpace());
}