// fields
        public void setRadius(float r)
        {
            JSICircle3D circle = (JSICircle3D)this.mGeom;

            this.mGeom = new JSICircle3D(r, circle.getPos(), circle.getRot());
            this.refreshAtGeomChange();
        }
        protected override void refreshRenderer()
        {
            JSICircle3D circle = (JSICircle3D)this.mGeom;
            MeshFilter  mf     = this.mGameObject.GetComponent <MeshFilter>();

            mf.mesh = circle.calcMesh(JSIAppCircle3D.NUM_SIDE);
            MeshRenderer mr = this.mGameObject.GetComponent <MeshRenderer>();

            mr.material       = new Material(Shader.Find("UI/Unlit/Transparent"));
            mr.material.color = this.mColor;
        }