int[] ids = this.getGeometryInfo().getDisplayListIDs();
//Delete default outline display list, not really usable in a mesh.
if (MT4jSettings.getInstance().isOpenGlMode()){
GL gl =((PGraphicsOpenGL)this.getRenderer().g).gl;
if (ids[1] != -1){
gl.glDeleteLists(ids[1], 1);
}
}
if (this.outlineContours != null){
ids[1] = generateContoursDisplayList();
this.getGeometryInfo().setDisplayListIDs(ids);