Yeah!It works (I guess). I had to use the right VM also.I obtain the attached screenshot. Apparently the background is not updated. Is this intended in your example?
Seems so.. an opengl buffer is cleared by fully transparent color:
gl
clearColor_red: 1 green: 1 blue: 1 alpha: 0;
clear: GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT.
then, when resulting image transferred back to Display form,
it only changes the pixels which is affected, but fully transparent ones will keep background unchanged.
The solution is to use opaque color(s) in opengl buffer,
or clear background by morph, before copying pixels from opengl buffer.
gl
clearColor_red: 1 green: 1 blue: 1 alpha: 0;
clear: GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT.
then, when resulting image transferred back to Display form,
it only changes the pixels which is affected, but fully transparent ones will keep background unchanged.
The solution is to use opaque color(s) in opengl buffer,
or clear background by morph, before copying pixels from opengl buffer.
Cheers,Alexandre<GLTest.st>_______________________________________________I attached a quick demo
GLTest new openInWorld
2013/6/4 Alexandre Bergel <alexandre.bergel@me.com>
Hi Igor,
Thanks for your help.
Unfortunately, I do not have much time to dive in the implementation. A student is asking me how he can use OpenGL in Pharo. I would like to give him a simple starting point
What would be a simple piece of code that simply open a cube on the screen? I cannot ask him to go and study SourceCity or the implementation of NBOpenGL. He barely knows Smalltalk but he is very smart.
So, how to show a cube on the screen please?
Cheers,
Alexandre
On Jun 4, 2013, at 4:32 AM, Igor Stasenko <siguctua@gmail.com> wrote:
> On 3 June 2013 21:06, Alexandre Bergel <alexandre.bergel@me.com> wrote:
>> How can I make sure that OpenGL works on my machine?
>
> You don't. It just works.
>
> The problem is that different hardware has different features supported.
> During initialization of context i checking + asking for some capabilities.
> Looks like your machine does not supports them fully, or
> initialization logic is flawed..
> Did you tried to use latest config of NBOpenGL on your machine?
>
>> What would be the hello world example in OpenGL in Pharo?
>>
>
> Anything which shows on screen, like drawing a triangle.
>
>> Cheers,
>> Alexandre
>
>> On Jun 3, 2013, at 7:27 AM, Igor Stasenko <siguctua@gmail.com> wrote:
>>
>>> On 3 June 2013 05:18, Alexandre Bergel <alexandre.bergel@me.com> wrote:
>>>> Osx 10.8.3
>>>>
>>>> Alexandre
>>>>
>>>
>>> It is strange.
>>> I checked things lately, NBOpenGL works fine on macs.
>>> But i seend that source city code has some modifications. Maybe that
>>> is the problem.
>>>
>>>> On Jun 2, 2013, at 10:29 PM, Igor Stasenko <siguctua@gmail.com> wrote:
>>>>
>>>>> On 3 June 2013 00:59, Alexandre Bergel <alexandre.bergel@me.com> wrote:
>>>>>> Where are such examples?
>>>>>> How can I try an example of OpenGl on my macbook?
>>>>>>
>>>>>> I've tried to execute "SourceCityGL new" and I got an error "No suitable implementation found for initializing OpenGL context for your platform". No idea why I got this. I have the same error when I try "GLTTRenderingDemo new"
>>>>>>
>>>>>> I am using Pharo 1.4 Summer. Do I have to install some libraries somewhere? I guess I have OpenGl installed on my mac.
>>>>>
>>>>> What OS version you running?
>>>>>
>>>>>>
>>>>>> Cheers,
>>>>>> Alexandre
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Jun 2, 2013, at 6:02 PM, Erwan Douaille <douailleerwan@gmail.com> wrote:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> 2013/6/2 Erwan Douaille <douailleerwan@gmail.com>
>>>>>>> it's okay, it happens since 2.0, just proceed
>>>>>>>
>>>>>>>
>>>>>>> 2013/6/2 Stephan Eggermont <stephan@stack.nl>
>>>>>>>> This package depends on the following classes:
>>>>>>>> TTFontReader
>>>>>>>> TTFontDescription
>>>>>>>> TTGlyph
>>>>>>>
>>>>>>> And you will not be able to launch NBOpenGL examples. (Ask Igor about that stuff)
>>>>>>> Maybe you should try it on pharo 1.4
>>>>>>> Which configuration to use?
>>>>>>> (In Moose 4.8)
>>>>>>>
>>>>>>> Stephan
>>>>>>> _______________________________________________
>>>>>>> Moose-dev mailing list
>>>>>>> Moose-dev@iam.unibe.ch
>>>>>>> https://www.iam.unibe.ch/mailman/listinfo/moose-dev
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Best regards,
>>>>>>>
>>>>>>> Douaille Erwan <douaille.erwan@gmail.com>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Best regards,
>>>>>>>
>>>>>>> Douaille Erwan <douaille.erwan@gmail.com>
>>>>>>> _______________________________________________
>>>>>>> Moose-dev mailing list
>>>>>>> Moose-dev@iam.unibe.ch
>>>>>>> https://www.iam.unibe.ch/mailman/listinfo/moose-dev
>>>>>>
>>>>>> --
>>>>>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
>>>>>> Alexandre Bergel http://www.bergel.eu
>>>>>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Best regards,
>>>>> Igor Stasenko.
>>>>
>>>> --
>>>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
>>>> Alexandre Bergel http://www.bergel.eu
>>>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Best regards,
>>> Igor Stasenko.
>>
>> --
>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
>> Alexandre Bergel http://www.bergel.eu
>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
>>
>>
>>
>
>
>
> --
> Best regards,
> Igor Stasenko.
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
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--
Best regards,
Douaille Erwan <douaille.erwan@gmail.com>--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.