public static RectF Transform(Rect3F rect, GLPanel3D viewport)
{
if (rect.IsEmpty)
{
return(RectF.Empty);
}
var p1 = rect.Location;
var p2 = p1 + new Vector3F(rect.SizeX, 0, 0);
var p3 = p1 + new Vector3F(0, rect.SizeY, 0);
var p4 = p1 + new Vector3F(0, 0, rect.SizeZ);
var p5 = p1 + new Vector3F(rect.SizeX, rect.SizeY, 0);
var p6 = p1 + new Vector3F(rect.SizeX, 0, rect.SizeZ);
var p7 = p1 + new Vector3F(0, rect.SizeY, rect.SizeZ);
var p8 = p1 + new Vector3F(rect.SizeX, rect.SizeY, rect.SizeZ);
var ret = RectF.Empty;
ret.Union(viewport.Point3DToPointInWpf(p1));
ret.Union(viewport.Point3DToPointInWpf(p2));
ret.Union(viewport.Point3DToPointInWpf(p3));
ret.Union(viewport.Point3DToPointInWpf(p4));
ret.Union(viewport.Point3DToPointInWpf(p5));
ret.Union(viewport.Point3DToPointInWpf(p6));
ret.Union(viewport.Point3DToPointInWpf(p7));
ret.Union(viewport.Point3DToPointInWpf(p8));
return(ret);
}
private void _UpdateBounds()
{
_bounds = Rect3F.Empty;
if (!_isVisible)
{
return;
}
var points = GetDrawPoints();
if (points != null)
{
foreach (var point in points)
{
_bounds.Union(point);
}
}
}