nstraintLinear( this._points, this._effLinkIdx + 1, this._points.length - this._effLinkIdx - 1 );
            FabricUtil.applyDistanceConstraintLinear( this._points, this._effLinkIdx - 1, this._effLinkIdx, -1, 1 );

            vec3.copy( this._points[ 0 ].pos, this._anchorPos );
            FabricUtil.applyDistanceConstraintLinear( this._points, 1, this._points.length-1, 1, -1 );

            dist = vec3.distance( this._points[ this._effLinkIdx ].pos, this._targetPos );
            if( dist <= this._minDis