Freeglut’s glutMouseWheelFunc callback is version dependant and not reliable in X. Use standard mouse function and test for buttons 3 and 4. The OpenGlut notes on glutMouseWheelFunc state: Due to lack of information about the mouse, it is impossible to implement this correctly on X at this time. Use of this function limits the portability … Read more
Cause: The stdlib.h which ships with the recent versions of Visual Studio has a different (and conflicting) definition of the exit() function. It clashes with the definition in glut.h. Solution: Override the definition in glut.h with that in stdlib.h. Place the stdlib.h line above the glut.h line in your code. #include <stdlib.h> #include <GL/glut.h>
OpenGL should be present already – it will probably be Freeglut / GLUT that is missing. GLUT is very dated now and not actively supported – so you should certainly be using Freeglut instead. You won’t have to change your code at all, and a few additional features become available. You’ll find pre-packaged sets of … Read more
Problems: There was no problem with pip install or easy_install The glut.dll and glut32.dll were missing. (They are not part of the PyPI package) you have to install them separately or download it like I did. Unzipped the dll files from the glutdlls.zip and placed them next to my python file. Note: You can add … Read more
There are two ways to draw strings with GLUT glutStrokeString will draw text in 3D (source: uwa.edu.au) and glutBitmapString will draw text facing the user (source: sourceforge.net)
Look my simple c implementation function to load texture. GLuint LoadTexture( const char * filename ) { GLuint texture; int width, height; unsigned char * data; FILE * file; file = fopen( filename, “rb” ); if ( file == NULL ) return 0; width = 1024; height = 512; data = (unsigned char *)malloc( width … Read more
In a rendering, each mesh of the scene usually is transformed by the model matrix, the view matrix and the projection matrix. Projection matrix: The projection matrix describes the mapping from 3D points of a scene, to 2D points of the viewport. The projection matrix transforms from view space to the clip space, and the … Read more
mingw32 exists as a package for Linux. You can cross-compile and -link Windows applications with it. There’s a tutorial here at the Code::Blocks forum. Mind that the command changes to x86_64-w64-mingw32-gcc-win32, for example. Ubuntu, for example, has MinGW in its repositories: $ apt-cache search mingw […] g++-mingw-w64 – GNU C++ compiler for MinGW-w64 gcc-mingw-w64 – … Read more
glReadPixels runnable PBO example The example below generates either: one ppm per frame at 200 FPS and no extra dependencies, one png per frame at 600 FPS with libpng one mpg for all frames at 1200 FPS with FFmpeg on a ramfs. The better the compression, the larger the FPS, so we must be memory … Read more