[Pharo-users] OpenGL minimum working example?

[Hernán Morales Durand]

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