/// <summary>
/// Pushes an effect that translates the coordinate space by the specified amount.
/// </summary>
public void PushTranslate(Point Offset)
{
GL.Translate(Offset.X, Offset.Y, 0.0);
if (this._TopTranslate != null)
{
Offset += this._TopTranslate.Offset;
}
_TranslateEffect te = new _TranslateEffect()
{
Offset = Offset,
Previous = this._TopTranslate
};
this._Effects.Push(this._TopTranslate = te);
}
/// <summary>
/// Undoes the most recent command/effect given to the context.
/// </summary>
public void Pop()
{
_Effect e = this._Effects.Pop();
// Remove clip effect
_ClipEffect ce = e as _ClipEffect;
if (ce != null)
{
this._TopClip = ce.Previous;
if (this._TopClip == null)
{
GL.Disable(EnableCap.ScissorTest);
}
else
{
this._TopClip.Apply(this._ViewSize.Y);
}
}
// Remove translate effect
_TranslateEffect te = e as _TranslateEffect;
if (te != null)
{
this._TopTranslate = te.Previous;
if (this._TopTranslate != null)
{
Point noffset = this._TopTranslate.Offset - te.Offset;
GL.Translate(noffset.X, noffset.Y, 0.0);
}
else
{
GL.Translate(-te.Offset.X, -te.Offset.Y, 0.0);
}
}
}