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Hi,
Here comes the whole cube_box::draw( routine from test/cube.cxx
void cube_box::draw() { lasttime = lasttime+speed;
if (!valid()) {
glLoadIdentity();
glViewport(0,0,pixel_w(),pixel_h());
glEnable(GL_DEPTH_TEST);
glFrustum(-1,1,-1,1,2,10000);
glTranslatef(0,0,-10);
glClearColor(0.4, 0.4, 0.4, 0);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(float(lasttime*1.6),0,0,1);
glRotatef(float(lasttime*4.2),1,0,0);
glRotatef(float(lasttime*2.3),0,1,0);
glTranslatef(-1.0, 1.2f, -1.5);
glScalef(float(size),float(size),float(size));
drawcube(wire);
glPopMatrix();
gl_color(FL_GRAY);
glDisable(GL_DEPTH_TEST);
gl_font(FL_HELVETICA_BOLD, 16 );
static GLuint DisplayList=-1;
if (DisplayList<0){ glDeleteLists(DisplayList, 1);
DisplayList = glGenLists (1);
glNewList(DisplayList, GL_COMPILE);
gl_draw(wire ? "Cube: wire" : "Cube: flat", -4.5f, -4.5f );
glEndList();
}
glCallList(DisplayList);
glEnable(GL_DEPTH_TEST);
// if an OpenGL graphics driver is installed, give it a chance
// to draw additional graphics
if (Fl::cfg_gfx_opengl) Fl_Gl_Window::draw();
}
fredag 25. september 2020 kl. 18:32:51 UTC+2 skrev Greg Ercolano:
On 2020-09-25 09:13, holm.h...@gmail.com wrote:
>
> Hello,
>
> I tried to call gl_draw into a displaylist. That was not a sucsess.Can be examplified by the cube.cxx test-code. I but the gl_draw in a displaylist (code below), but then nothing show in the screen.
>
> Suprise to me. Should that be expected, or is this a bug? Btw. to me it seems like gl_draw is pretty he heavy function/draw a lot of cpu.
>
> static GLuint DisplayList=-1;
> if (DisplayList<0){ glDeleteLists(DisplayList, 1);
> DisplayList = glGenLists (1);
> glNewList(DisplayList, GL_COMPILE);
> gl_draw(wire ? "Cube: wire" : "Cube: flat", -4.5f, -4.5f );
> glEndList();
> }
> glCallList(DisplayList);
Would need to see more code to weigh in.. can you supply a minimal
complete, compilable program so we can build and replicate?
Sometimes the problem is elsewhere, e.g. during setup.
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