Re: [PyOpenGL-Users] VBO memory not cleaned up ?

[Michka P. <mic...@gm...>]

Oups sorry, the bug came from me not updating the good variable for my index
array. So "everything" works now.

It works on Mac OS X with python from macports, but not on Ubuntu (I get
only a black screen). I'll have to find out why ...
I'ill open a new thread if I don't find it out.

Sorry for the disturbance

Michka

2011/4/24 Michka Popoff <mic...@gm...>

> Hello
>
> I am trying to use VBO's to display a big colored meshgrid. I have a
> problem, as I think the buffer is not cleared correctly when I delete it.
> What I am doing :
>
> - Calculate the indexes, vertexes and colors of the meshgrid (on init)
> - Buffer
> - Display
> - On user input (by keyboard), change a parameter (call it "z"), and
> recalculate a new meshgrid
>
> But there seem to be some display bugs, some triangles are not on the right
> place, and as I go on with new calculations (new "z"), the grid is more and
> more messed up.
> I tested with going directly to a new meshgrid (with a fixed parameter "z"
> on init) , and the meshgrid is displayed without graphical bug. So the bug
> is not coming from my vertexes array or index array.
>
> So :
> - If I init directly the meshgrid with a specific "z" parameter (for
> example z=6), no problem
> - If I go from z=0 to z=6 (by steps of 1), the grid at z=6 is messed up
>
> I use the VertexBuffer class from Nathan Ostgard (
> http://www.siafoo.net/snippet/185), but a little bit modified :
>
> For the creation of the buffer :
> self.buffer = glGenBuffers(1)
>
> To delete the buffer : (needed to add int() here, without it there is a
> TypeError ...)
> glDeleteBuffers(1, int(self.buffer))
> self.buffer = None
>
> I checked the deletion of the buffer with glIsBuffer, it says that it is
> well deleted (Vertexes, color and indexes buffer).
>
> So what could be the problem ? Should I post some code to show what I am
> doing in detail ?
>
>
> Using python 2.7 and opengl 3.0.1 through macports.
>
> Thank you in advance !
>
> Michka Popoff
>
>
>
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