Re: OpenGL revisited

From: Valeri Fine (Faine) (fine@bnl.gov)
Date: Fri Mar 31 2000 - 16:28:01 MEST


----- Original Message -----
From: Thomas Eberl <teberl@physik.tu-muenchen.de>
To: <roottalk@pcroot.cern.ch>
Sent: 31 марта 2000 г. 8:26
Subject: OpenGL revisited


> Dear rooters,
>
> I apologize that I come with the same subject again.
> I have tried to change the color of a TShape object by using the dialog
> canvas that pops up, when one clicks on SetLineAttributes in the
> corresponding right mouse button menu for the node. This change is also
> visible in the OpenGL view (unfortunately I have to zoom out to the
> maximum each time to see the whole object which is cut seemingly at the
> border of the volume of the first node -- how to change this minor
> nuisance ??).

  There are two ways:

    1. Switch from orthographic to perspective projection  by clicking "P" letter
    2. Change the size of the 3D viewpoint by clicking "a" / "s"
      (here we imitate the X3D interface)
   3.  Apply both approaches above.

  You can do the same things via API.


> In the next step I have tried to change the Line color via the CINT by
> saying:
> trap[0] -> SetLineColor(9);
> then I have tried various combinations of
> c1->Modified();
> c1->Update();
>
> but the change does not become visible.
>
> Could somebody give me a hint ??
>
> regards Thomas
> --
> Thomas Eberl                       Phone: (+49 89) 289 1 2425
> Physik-Department E12, Technische Universitaet Muenchen
> James-Franck-Strasse *** D-85748 Garching b. Muenchen
> Email: Thomas.Eberl@physik.tu-muenchen.de
>



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