GmlStrokeDrawer curve = new CurvesDemo();
add(curve);
GmlStrokeDrawer mesh = new MeshDemo();
add(mesh);
GmlStrokeDrawer boxes = new BoxesDemo();
add(boxes);
GmlStrokeDrawer strokefat = new StrokeFatDemo();
add(strokefat);
GmlStrokeDrawer triangles = new TriangleDemo();
add(triangles);