private Vector3 CalculateRaytraceDirection(Vector2 mousePosition)
{
Matrix4x4.Invert(_camera.CalcProjectionMatrix(), out var inverseProjection);
Vector4 rayEye = Vector4.Transform(new Vector3(new Vector2(mousePosition.X / _camera.Aspect, mousePosition.Y), -1), inverseProjection);
rayEye = new Vector4(rayEye.X, rayEye.Y, -1, 0);
Vector4 rayWorld = Vector4.Transform(rayEye, _camera.CalcViewMatrix());
rayWorld = Vector4.Normalize(rayWorld);
return(new Vector3(rayWorld.X, rayWorld.Y, rayWorld.Z));
}
