public void SetViewport(int x, int y, int width, int height, float orthoSize = 0, bool virtualScreen = false)
{
if (zNear == 0 && zFar == 0)
{
zNear = -1;
zFar = 1;
}
// store values before changes
this.viewportPosition = new Vector2(x, y);
this.viewportSize = new Vector2(width, height);
// fix y as it is downsided in OpenGL
y = (this.height - y) - height;
if (virtualScreen)
{
Graphics.Viewport(0,
0,
width,
height);
}
else
{
Graphics.Viewport((int)(x * this.scaleX),
(int)(y * this.scaleY),
(int)(width * this.scaleX),
(int)(height * this.scaleY));
}
this._aspectRatio = (float)width / (float)height;
if (orthoSize == 0)
{
orthoSize = this.defaultOrthographicSize;
}
// use units instead of pixels ?
#if __SHARPDX__
if (orthoSize > 0)
{
Matrix4.OrthoOffCenterRH(0, orthoSize * this._aspectRatio, orthoSize, 0, zNear, zFar, out this.projectionMatrix);
}
else
{
Matrix4.OrthoOffCenterRH(0, width, height, 0, zNear, zFar, out this.projectionMatrix);
}
#else
if (orthoSize > 0)
{
this.projectionMatrix = Matrix4.CreateOrthographicOffCenter(0, orthoSize * this._aspectRatio, orthoSize, 0, zNear, zFar);
}
else
{
this.projectionMatrix = Matrix4.CreateOrthographicOffCenter(0, width, height, 0, zNear, zFar);
}
#endif
this.currentOrthographicSize = orthoSize;
}