private static RectangleF CalculateBoundingBox(RectangleF rectangle, Matrix transformation)
{
PointF tl = rectangle.Location;
PointF tr = new PointF(rectangle.Right, rectangle.Top);
PointF bl = new PointF(rectangle.Left, rectangle.Bottom);
PointF br = new PointF(rectangle.Right, rectangle.Bottom);
transformation.Transform(ref tl);
transformation.Transform(ref tr);
transformation.Transform(ref bl);
transformation.Transform(ref br);
PointF rtl = new PointF(
Math.Min(tl.X, Math.Min(tr.X, Math.Min(bl.X, br.X))),
Math.Min(tl.Y, Math.Min(tr.Y, Math.Min(bl.Y, br.Y))));
PointF rbr = new PointF(
Math.Max(tl.X, Math.Max(tr.X, Math.Max(bl.X, br.X))),
Math.Max(tl.Y, Math.Max(tr.Y, Math.Max(bl.Y, br.Y))));
return SharpDXExtensions.CreateRectangleF(rtl, new SizeF(rbr.X - rtl.X, rbr.Y - rtl.Y));
}
private static Rect RectTransform( Rect rect, Matrix matrix )
{
// WPF equivalent of following code:
// Rect rectTransformed = Rect.Transform(rect, matrix);
var leftTop = matrix.Transform( new Point( rect.Left, rect.Top ) );
var rightTop = matrix.Transform( new Point( rect.Right, rect.Top ) );
var leftBottom = matrix.Transform( new Point( rect.Left, rect.Bottom ) );
var rightBottom = matrix.Transform( new Point( rect.Right, rect.Bottom ) );
var left = Math.Min( Math.Min( leftTop.X, rightTop.X ), Math.Min( leftBottom.X, rightBottom.X ) );
var top = Math.Min( Math.Min( leftTop.Y, rightTop.Y ), Math.Min( leftBottom.Y, rightBottom.Y ) );
var right = Math.Max( Math.Max( leftTop.X, rightTop.X ), Math.Max( leftBottom.X, rightBottom.X ) );
var bottom = Math.Max( Math.Max( leftTop.Y, rightTop.Y ), Math.Max( leftBottom.Y, rightBottom.Y ) );
var rectTransformed = new Rect( left, top, right - left, bottom - top );
return rectTransformed;
}
