Re: [Libvisual-devel] Fwd: question about libvisual_gl_lv_flower

[Scott S. <sis...@gm...>]

Hi,

I committed this fix to sf.net svn repo.

There's a small program under trunk/examples/client. Run './rebuild_sdl'
and it'll give you an executable named 'lv_standalone'.

Run it with: ./lv_standalone lv_flower

By default lv_standalone uses the xmms2 input plugin. You can change that
by passing a second command line parameter to lv_standalone.

Such as: ./lv_standalone lv_flower mplayer

- Scott

On Fri, Dec 16, 2011 at 8:23 AM, Julien Isorce <jul...@gm...>wrote:

>
> Hi,
> I built and install the libvisual and libvisual-plugins from svn sources.
> Now, what is the fastest way to try libvisual_gl_lv_flower ? (any tool /
> command line ?)
> Sincerely
> Julien
>
>
> 2011/12/16 Antti Silvast <ant...@ik...>
>
>> Hi Julien,
>>
>> Thank you for pointing this out. This is indeed an omission: there
>> should be a glPushMatrix as well.
>>
>> void render_flower_effect(FlowerInternal *flower) {
>>
>>      glClearColor(col1[0],col1[1],col1[2],0.0);
>>      glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
>>      glMatrixMode (GL_PROJECTION);
>>      glLoadIdentity ();
>>      gluPerspective(60.0, (float)flower->width/(float)flower->height,
>> 0.01, 1135.0);
>>
>>      glMatrixMode (GL_MODELVIEW);
>>      glLoadIdentity ();
>>
>>      glPushMatrix(); // ADD THIS HERE! -AS
>>
>>      glTranslatef(0.0,0.0,-1.0);
>>
>>      lights(flower);
>>      glPopMatrix();
>>      flower->posz=FR*flower->posz_new+(1.0-FR)*flower->posz;
>>      glTranslatef(0.0,0.0,-flower->posz);
>>
>>      glRotatef(flower->rotx,1.0,0.0,0.0);
>>      glRotatef(flower->roty,0.0,1.0,0.0);
>>
>> glRotatef(visual_timer_elapsed_msecs(&flower->timer)*0.02,0.0,0.0,1.0);
>>      render_flower(flower);
>> }
>>
>> I guess the push-pop is needed to translate the lights, which are always
>> posited in z=-1.0, which are not like the flower, which may be in
>> various z-positions.
>>
>> Let me know if this helps.
>>
>> All the best,
>>
>> Antti
>>
>> On Fri, 2011-12-16 at 12:23 +0100, Julien Isorce wrote:
>> > Hi,
>> >
>> > In the source code of gl_lv_flower there is a glPopMatrix but there is
>> > no glPushMatrix before. The result is a GL_STACK_UNDERFLOW.
>> > Any reason for that ?
>> >
>> >
>> > The code of libvisual_gl_lv_flower is
>> > there :
>> http://libvisual-plugins.sourcearchive.com/documentation/0.4.0.dfsg.1/main_8c-source.html
>> >
>> >
>> > All libvisual plugins are
>> > there:
>> http://libvisual-plugins.sourcearchive.com/documentation/0.4.0.dfsg.1/files.html
>> >
>> >
>> > Sincerely
>> > Julien
>>
>>
>>
>
>
>
> ------------------------------------------------------------------------------
> Learn Windows Azure Live!  Tuesday, Dec 13, 2011
> Microsoft is holding a special Learn Windows Azure training event for
> developers. It will provide a great way to learn Windows Azure and what it
> provides. You can attend the event by watching it streamed LIVE online.
> Learn more at http://p.sf.net/sfu/ms-windowsazure
> _______________________________________________
> Libvisual-devel mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libvisual-devel
>
>