[Qt-interest] Problem using OpenGL from Qt Application

[Donal O'Connor]

How about adding the line that Rainer suggested :)

You have no projection matrix set up. I'm not sure what the default is, but
it could be from 0 - 1, so you clip when you go below the Z axis of -1.

Donal

On Tue, Oct 20, 2009 at 5:23 PM, Sujan Dasmahapatra <
sujan.dasmahapatra at gmail.com> wrote:

> I am not sure ! Can somebodyelse check if what I wrote is right or wrong !
> Thanks
>
> On Tue, Oct 20, 2009 at 8:06 PM, Rainer Wiesenfarth <
> Rainer.Wiesenfarth at inpho.de> wrote:
>
>>
>> From: Sujan Dasmahapatra
>> > [...]
>> > void GraphicsView::paintGL()
>> > {
>> >     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>> >     glLoadIdentity();
>> >     glTranslated(0.0, 0.0, -10.0);
>> >     [...]
>> > }
>> > [...]
>>
>> Correct me if I am wrong, but the translate causes all geometry getting
>> clipped, doesn't it? I would assume it works if you add
>>
>>   glMatrixMode (GL_PROJECTION);
>>   glOrtho (-20.0, 20.0, -20.0, 20.0, -20.0, 20.0);
>>   glMatrixMode (GL_MODELVIEW);
>>
>> between glClear() and glLoadIdentity().
>>
>> Best Regards / Mit freundlichen Grüßen
>> Rainer Wiesenfarth
>>
>> --
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>
>
> --
> Thanks & Regards
> S. Dasmahapatra
> B.E. (Aeronautics-Aerodynamics)
> Bangalore, India
> Ph:91-9900839788
> Office:91-80-66470248
> mail id : sujan.dasmahapatra at gmail.com
>
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