z-index conflict with label2dRenderer

[mbredif]

The label2dRenderer has a z-index that covers/hides all other elements (including dat.GUI) when they use the default z-index of 0, so that the user may not interact with the non-itowns elements.

workarounds:

• if labels are not used, is to simply hide its dom element. view.mainLoop.gfxEngine.label2dRenderer.domElement.style.display = "none";

• if labels are used, one tentative fix is to push away itowns dom elements :

  view.mainLoop.gfxEngine.label2dRenderer.domElement.style.zIndex=-1;
  view.mainLoop.gfxEngine.renderer.domElement.style.zIndex=-2;

In any case, the doc should state which z indices are used by itowns so that user dom elements may be placed accordingly.

[jailln]

This should indeed be documented. More long term, the labels rendering will be moved to WebGL.