# Get an MVP matrix for an eye at `diff` world unit from the center
	private fun mvp_matrix_eye(diff: Float): Matrix
	do
		var view = new Matrix.identity(4)

		# Translate the world away from the camera
		view.translate(-position.x/2.0, -position.y/2.0, -position.z/2.0)

		# Rotate the camera, first by looking left or right, then up or down
		view = view * rotation_matrix

		# Apply eye transformation
		var translation = new Matrix.identity(4)
		translation.translate(diff, 0.0, 0.0)
		view = view * translation

		# Use a projection matrix with a depth
		var projection = new Matrix.perspective(pi*field_of_view_y/2.0,
			display.aspect_ratio, near, far)

		return view * projection
	end