public static void Translate(IBoxModelElement element, Vector2f delta, float z = 0)
{
IElementFrame item = element as IElementFrame;
Frame3f f = item.GetObjectFrame();
f.Origin += new Vector3f(delta.x, delta.y, z);
item.SetObjectFrame(f);
}
protected override void layout_item(SceneUIElement e)
{
AxisAlignedBox2f box = Container.Bounds2D;
IBoxModelElement boxElem = e as IBoxModelElement;
IElementFrame eFramed = e as IElementFrame;
if (PinConstraints.ContainsKey(e))
{
Pin pin = PinConstraints[e];
// evaluate pin constraints in 2D box space
Vector2f SourcePos = pin.FromF();
Vector2f PinToPos = pin.ToF();
// map center of object into box space
// note: ignores orientation!
Frame3f objF = eFramed.GetObjectFrame();
Vector2f center2 = Region.To2DCoords(objF.Origin);
// construct new 2D position
Vector2f vOffset = SourcePos - center2;
Vector2f vNewPos = PinToPos - vOffset;
// map 2D position back to 3D surface and orient object
Frame3f frame = Region.From2DCoords(vNewPos, pin.fZ);
eFramed.SetObjectFrame(frame);
}
else if (boxElem != null)
{
// position object at center of box region
Frame3f frame = Region.From2DCoords(Vector2f.Zero, 0);
eFramed.SetObjectFrame(frame);
}
else
{
// do nothing?
}
}