Positive values turn self to the left, and negative values to the right.
All actor rotations follow the right hand rule. The default orientation of the model should look towards -Z.
	# Rotation around the Y axis (+ turns left, - turns right)
	#
	# Positive values turn `self` to the left, and negative values to the right.
	#
	# All actor rotations follow the right hand rule.
	# The default orientation of the model should look towards -Z.
	var yaw = 0.0 is writable
					lib/gamnit/depth/depth_core.nit:57,2--63,26