/**
* Get a string for cacheing this object. Null means do not cache this texture.
*
* @param stage The stage number, 0 for all single stage textures.
* @return A string to use in lookups. Typically the url loaded.
*/
public String getCacheString(int stage) {
VRMLTextureNodeType tex = (VRMLTextureNodeType) vfTexture.get(stage);
if (tex == null) return null;
return tex.getCacheString(0);
}
