public void setLineColor(Color c) {
   lineColorChooser.setColor(c);
   String attribute = CommonAttributes.LINE_SHADER + "." + CommonAttributes.DIFFUSE_COLOR;
   getAppearance().setAttribute(attribute, c);
 }
 public void setFaceColor(Color c) {
   faceColorChooser.setColor(c);
   String attribute = CommonAttributes.POLYGON_SHADER + "." + CommonAttributes.DIFFUSE_COLOR;
   getAppearance().setAttribute(attribute, c);
 }
 public void setPointColor(Color c) {
   pointColorChooser.setColor(c);
   String attribute = CommonAttributes.POINT_SHADER + "." + CommonAttributes.DIFFUSE_COLOR;
   getAppearance().setAttribute(attribute, c);
 }