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STR #2590

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STR #2590

Application:FLTK Library
Status:5 - New
Priority:4 - High, e.g. key functionality not working
Scope:2 - Specific to an operating system
Subsystem:Unassigned
Summary:glut specifics functions are not working with FLTK 2
Version:2.0-current
Created By:oggy
Assigned To:Unassigned
Fix Version:Unassigned
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Name/Time/Date Filename/Size  
 
#1 oggy
14:17 Mar 15, 2011
glut_with_fltk2.cxx
1k
 
     

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#1 oggy
14:17 Mar 15, 2011
I chose "specific to an operating system" as scope, because i've only tested it with Linux. Perhaps you would encounter the same issue with MS-Windows or MacOS-X.

When you use specifics Glut functions, that is not present in libfltk2_glut.so, you get an error message from freeglut.
For example, you would use "glutWireSphere", which is present only in freeglut.so.

"freeglut  ERROR:  Function <glutWireSphere> called without first
calling 'glutInit'."

Others glut functions are usable, as long as they belong to libfltk2_glut.so .
For example, we can use glutSwapBuffers() with no problems.


Attached, you will find a complete sample which put a glut subwindow into a fltk window. Then, it attempts to draw a sphere with "glutWireSphere".
The compilation & linking are ok. It crashes at execution, with freeglut complaining about "glutInit" which has to be called first (fltk should do it for me, but it doesn't change anything if i add the "glutInit()" call in my code).

I've followed the recommandations of the documentation:
- I put the win.show() before the glut's subwindow creation.
- I add "-lglut" at the very end of the linking libraries evaluation.
- The programm runs properly if you comment "glutWireSphere" call.

The following source file was compiled using:
 g++ glut_subwindow.cxx -lfltk2 -lfltk2_gl -lfltk2_glut -lGL -lglut
 
     

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