[Gambas-user] [Gambas3] The static method Gl.SelectBuffer

[laurent bernabe]

Hello : thank you for your answer.

Ok, I went into the Gambas SVN repository, in the source
/trunk/gb.opengl/src/GLselectFeedback.c and I noticed the use of an
internal buffer.

But I still don't understand how I can get the value stored in the buffer,
once I left the GL_SELECT mode.

I've joined my openGL application source files : MMain class, and
ColoredCube.class.

In MMain, method screen_Draw(), I tried to get the value of the array
returned by gl.RenderMode(gl.RENDER), but I get an error, line 37 : Null
object reference.

What's wrong with my code ?

Regards

Laurent Bernabé

2012/11/17 <tommyline at ...2340...>

> As set in GLselectFeedback.c file in gb.opengl/src gambas source directory
> gl.SelectBuffer sets buffer with size 2048 and uses internal selectbuffer
> array of size 2048.
>
> ----- Original Message -----
> From: "laurent bernabe" <laurent.bernabe at ...626...>
> To: "mailing list for gambas users" <gambas-user at lists.sourceforge.net>
> Sent: Saturday, 17 November, 2012 11:25:44 AM
> Subject: Re: [Gambas-user] [Gambas3] The static method Gl.SelectBuffer
>
> Thank you :)
>
> I think I'll wait for him : also because I have another difficulty
> regarding object selection/picking in Gambas3 OpenGL.
>
> Regards
>
> 2012/11/17 François Gallo <basic.gambas at ...626...>
>
> >
> > Le 17 nov. 2012 à 09:38, laurent bernabe <laurent.bernabe at ...626...> a
> > écrit :
> >
> > > Hello,
> > >
> > > I am trying to do picking in OpenGL in Gambas3.
> > > So I need to use the method Gl.SelectBuffer, but I am facing a big
> > problem :
> > >
> > > Whereas the Official OpenGL documentation says that it takes arguments
> > Size
> > > (int) and Buffer (array of unsigned int), (and Gambas one says it also
> > !!!)
> > > : I noticed that this function don't take any argument.
> > >
> > > So, how can set then get the buffer to use with gl.SelectBuffer() ?
> >
> > For the gb.opengl component, i recommend you to contact (or wait) Laurent
> > Carlier.
> > he is the author of gb.opengl and certainly who is the best placed to
> > answer to your
> > question.
> >
> > >
> > > Thanks in advance :)
> > >
> > > Regards
> > >
> > > Laurent Bernabé
> > >
> >
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