This is a unit vector that is perpendicular to the plane handles.
For example, in case of Controls.pickPlaneXY, it is
THREE.Vector3(0,0,1) (along the z-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 pick plane handles. It requires setting the property
up.