Second follow-up: I've got a very nice revision to SpherePortrayal3D and 

a few other classes which makes it easy to modify the attributes (color, 

size, etc.) of spheres at any time.  It's partially 

non-backward-compatable, but I think it'll be okay.  I can commit this 

if you want to play with it and then work on getting the other similar 

portrayals (cone, etc.) working nicely.  Or just do a big submit in a 

while.  Lemme know.



Sean



Joerg Hoehne wrote:

> Dear developers,

> 

> I'm trying to change the color of an SpherePortrayal3D object during runtime. I've checked my 

> code and I'm positive the color of the object will be changed but not visualized accordingly.

> 

> I've got the impression the color of a XXXPortrayal3D object can't be changed after the first 

> construction (or display) of the 3D scene by j3d. Before the first construction/display I was able to 

> change the color with the same code snipped found below.

> Here is the code snippet anyway ('this' references to a subclassed SpherePortrayal3D object):

> 

> this.appearance = SpherePortrayal3D.appearanceForColor(color);

> 

> There has been a discussion some years ago about a similar topic (changing the transparency 

> during runtime) and I wonder if a solution has been found.

> 

> I'm working on a Mac with OS X 10.6. The monitored effect might be os depended because j3d 

> might cache some information about the displayed objects and assumes some properties won't 

> change in the future.

> 

> Help!

> 

> 

> Jörg