"xMag and yMag must be set when no aspect ratio is given");
if (this.aspectRatio != null
&& (this.xMag != null && this.yMag != null))
throw new IllegalStateException(
"Only xMag or yMag must be set when aspect ratio is given");
final Orthographic orthographic = new Orthographic(this.zNear, this.zFar);
orthographic.setAspectRatio(this.aspectRatio);
orthographic.setXMag(this.xMag);
orthographic.setYMag(this.yMag);
return orthographic;
}