Aim the camera at x, y, z

Property definitions

gamnit $ EulerCamera :: look_at
	# Aim the camera at `x, y, z`
	fun look_at(x, y, z: Float)
	do
		var dx = position.x
		var dy = position.y
		var dz = position.z

		yaw = atan2(dx, dz)
		pitch = atan2(-dy, dz)
	end
lib/gamnit/cameras.nit:101,2--110,4