public void UpdateLightCamera()
{
Vector3 forward = MathHelper.Forward;
Vector3 targetPlaneX = MathHelper.Right;
Vector3 targetPlaneY = MathHelper.Up;
var world = Matrix.Identity;
world *= Matrix.Scaling(new Vector3(LightRadius, LightRadius, LightRadius));
world *= Matrix.Scaling((float)Math.Tan(SpotLightAngle) * (targetPlaneX + targetPlaneY) + forward);
Vector3 up = MathHelper.Up;
if (Math.Abs(Vector3.Dot(up, SpotDirection)) > 0.999)
{
up = MathHelper.Right;
}
world *= Matrix.Invert(Matrix.LookAtRH(Vector3.Zero, -SpotDirection, up));//world *= Matrix.CreateWorld(Vector3.Zero, -SpotDirection, up);
world *= Matrix.Translation(LightPosition);
Vector3 scale, translation;
Quaternion rotation;
world.Decompose(out scale, out rotation, out translation);
Matrix view = Matrix.Invert(world);
Matrix projection = Matrix.PerspectiveFovRH(MathHelper.PiOver2, 1, 0.01f, 1); //TODO: fix field of view?
LightCamera.SetViewProjectionMatrix(view, projection);
LightCamera.NearClip = 0.01f;
LightCamera.FarClip = 1;
}
