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STR #2590

Trouble Report Files:

	Name/Time/Date	Filename/Size
	#1  oggy 14:17 Mar 15, 2011	glut_with_fltk2.cxx 1k

Trouble Report Comments:

	Name/Time/Date	Text
	#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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