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I found the problem, there was "static" variables inside functions.

I uses VC++ 6.0 on Windows XP x32


I have defined in settings page "Code generation" "Use run-time library" as "Debug Multithreaded DLL" for debug and for realize "Multithreaded DLL". Do you...

There is on shared variables, functions working separately. The heap allocation data is not synchronized. But as I read in Internet - operator new and delete should be sinhronized.

I've got a problem with sinhronisation of a function which is called from several threads. The function do no use static variables. And there is no connection variables between threads. In debuger...

I faced with problem of rendering OpenGL objects with 2 or 3 lights on printing preview and printing. It different as by drowing on screen using hardware acceleration. It uses lighting from tow lides...

We use standard OpenGL from MicroSoft

I found hint to solve the problem - to add aditionals lights with opossite directions.
But anyway would like to have correct solution of this problem.

I am using glDrawArrays function and sets befor glLightModel(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE). Polygons are drawn with one side lighting. If I change glDrawArrays drawing to usage of glBegin(...

Will I have improvements in drawing with OpenGL, if I would sort objects by their colors (materials) and call functions glColor, glMaterial when the color is changed? How fast glColor, glMaterial...

I am drawing using OpenGL and GDI on top of a picture which were drawn before in CView::OnDraw function.
First 2-3 seconds it draws sucessfully, and then cursor of mouse become "clock"( meanth...

It is bad idea to do that. But big part of code is already implemented. And to rewrite everything to OpenGL will take huge amount of time. So, I am looking for easest way to solve the problem

I’ve got problem with using GDI on top of OpenGL in Windows Vista. I’ve found that if GDI graphic would be drawn before any drawing operation of OpenGL than everything what was drawn by GDI would be...