OpenGL minimum working example?

Hi.

I tried to get an OpenGL MWE from
https://github.com/ronsaldo/uffi-opengl in both Windows 8.1 and MacOS
without luck. What I tried so far is to render a simple figure in a
new window, adding this method to UFFIOpenGLOffscreenSamples:

>>sample2

" self new sample2
"

| context gl fb |
context := UFFIOpenGLContext new.
gl := context gl.
fb := context offscreenBufferExtent: 300@300.
context asCurrentDo: [
    fb activate.
    gl
        " loadIdentity;"
        clear: GL_COLOR_BUFFER_BIT;
        begin: GL_QUADS;
        color3f_red: 1.0 green: 0.0 blue: 0.0;
        vertex3f_x: 0.0 y: 0.0 z: 0.0;
        vertex3f_x: 0.5 y: 0.0 z: 0.0;
        vertex3f_x: 0.5 y: 0.5 z: 0.0;
        vertex3f_x: 0.0 y: 0.5 z: 0.0;
        end;
        flush ].
fb asForm asMorph openInWindow.

However the result is that VM hangs in both platforms.
Any advice what I'm missing?

Cheers,

Hernán

Hello Hernan,

I have partially working code at
http://smalltalkhub.com/#!/~tomooda/Jun4Pharo

My code still have two problems that
* depending on resolution, projection matrix can't be properly set, and
* it freezes pharo when switching to fullscreen

Best Regards,
---
tomo

Hello Hernan,

I tested the code only on Mac.
---
tomo

2018/11/13(Tue) 8:27 Tomohiro Oda <[hidden email]> wrote:

Hello Tomo,

Thank you, very interesting project!
BTW to load Jun4Pharo with UFFI OpenGL the expression is:

Gofer new
    smalltalkhubUser: 'tomooda' project: 'Jun4Pharo';
    configurationOf: #Jun;
    load.
(Smalltalk at: #ConfigurationOfJun) project development load: #('Core').

There are only a few warnings during installation:

This package depends on the following classes:
  TabActionButton
  NewListRenderer
  NewList
  Tab
  TabBar
You must resolve these dependencies before you will be able to load
these definitions:
  NewList>>#drawOnAthensCanvas:
  NewListRenderer>>#drawOnAthensCanvas:
  NewListRenderer>>#drawSubmorphsOnAthensCanvas:
  Tab>>#createClosedPolygonPathFrom:on:
  Tab>>#createLinesPathFrom:on:
  Tab>>#drawOnAthensCanvas:
  TabActionButton>>#drawOnAthensCanvas:
  TabBar>>#drawLinesOnAthensCanvas:
  TabBar>>#drawLinesWithSelection:
  TabBar>>#drawSubmorphsOnAthensCanvas:

Most examples works also on Windows on Pharo 7. However the UFFI
OpenGL freezes the image if launched on full-screen.

Cheers,

Hernán


El lun., 12 nov. 2018 a las 20:41, Tomohiro Oda
(<[hidden email]>) escribió: