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Duncan, I'm so embarrased you are right, the test can never be satisfied. However with these corrected lines still the text do still not show : static GLuint DisplayList=1000;
if (DisplayList==1000){
printf("Hi\n");
DisplayList = glGenLists (1);
glNewList(DisplayList, GL_COMPILE);
gl_draw("FLTK is great!", -4.5f, -4.5f );
glEndList();
}
glCallList(DisplayList);
Ian, you may be right that gl_draw is not slow. Still in my code I would like to put opengl-calls in a displaylist.
fredag 25. september 2020 kl. 21:35:05 UTC+2 skrev duncan:
static GLuint DisplayList=-1;
if (DisplayList<0){ glDeleteLists(DisplayList, 1);
Surely a GLuint is an unsigned int, so assigning -1 will cause rollover and the test can never be satisfied?
D.
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