/*
* public Ray GetRayFromScreenPoint(Vector2 screen) {
* var screenX = screen.X;
* var screenY = screen.Y;
* var scaleFactor = new Vector2(1, 1);
* // Normalized Device Coordinates Top-Left (-1, 1) to Bottom-Right (1, -1)
* float x = (2.0f * screenX) / (prevScreenWidth / scaleFactor.X) - 1.0f;
* float y = 1.0f - (2.0f * screenY) / (prevScreenHeight / scaleFactor.Y);
* float z = 1.0f;
* Vector3 deviceCoords = new Vector3(x, y, z);
*
* // Clip Coordinates
* Vector4 clipCoords = new Vector4(deviceCoords.X, deviceCoords.Y, -1.0f, 1.0f);
*
* // View Coordinates
* Matrix4x4.Invert(ProjectionMatrix, out Matrix4x4 invProj);
* Vector4 viewCoords = Vector4.Transform(clipCoords, invProj);
* viewCoords.Z = -1.0f;
* viewCoords.W = 0.0f;
*
* Matrix4x4.Invert(ViewMatrix, out Matrix4x4 invView);
* Vector3 worldCoords = Vector4.Transform(viewCoords, invView).XYZ();
* worldCoords = Vector3.Normalize(worldCoords);
*
* return new Ray(Position, worldCoords);
* }*/
protected override void CreateState(out CameraState state)
{
state = CameraState.OrthographicState();
}