This is a unit vector that runs along the axis of the rotation handles.
For example, in case of Controls.rotationX, it is
THREE.Vector3(1,0,0) (along the x-axis).
Methods
setColor
setColor(color: string): void
sets the color for the handle; this may involve setting colors for multiple
constituent meshes that form the handle (interactive or non-interactive)
This class can be extended to create custom rotation handles. It requires setting the property
up.