## Joint.PreferredAxisReference

### Description

Sets or returns the X3DObject object acting as the preferred axis reference. You can remove the preferred axis reference by setting the property to Nothing.

### C# Syntax

    // get accessor
    X3DObject rtn = Joint.PreferredAxisReference;
    // set accessor
    Joint.PreferredAxisReference = X3DObject;

### Examples

#### VBScript Example

    set oRoot = application.activeproject.activescene.root
    set oNull = oRoot.AddNull("PreferredAxisReference")
    oRootPos = array(0,10,0)
    oEffPos = array(10,10,0)
    oNormalAxis = array(1,1,1)
    set oChainRoot = oRoot.Add3DChain( oRootPos, oEffPos, oNormalAxis )
    set oJoint = oChainRoot.Bones(0).Joint
    oJoint.parameters("resplane").value = siPreferredAxis
    set oJoint.PreferredAxisReference = oNull