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>
On Windows there is OpenGL extension method wglSwapIntervalEXT. From the post by b2b3 http://www.gamedev.net/community/forums/topic.asp?topic_id=360862: If you are working on Windows you have to use extensions to use wglSwapIntervalExt function. It is defined in wglext.h. You will also want to download glext.h file. In wglext file all entry points for Windows specific extensions are declared. All … Read more
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
find_package(OpenGL) will find the package for you, but it doesn’t link the package to the target. To link to a library, you can use target_link_libraries(<target> <item>). In addition, you also need to set the include directory, so that the linker knows where to look for things. This is done with the include_directories. An example CMakeLists.txt … Read more
I haven’t downloaded your project. What people mostly struggle with when writing OBJ import code for rendering with OpenGL is the indices. And as @ratched_freak also suspects in his comment, that’s very consistent with the visual appearance of your cube. The OBJ format uses separate indices for positions, normals, and texture coordinates. For OpenGL rendering, … Read more
You can use glRotate to rotate around an axis, by an amount which is given by the relative mouse movement (pygame.mouse.get_rel()): mouseMove = pygame.mouse.get_rel() glRotatef(mouseMove[0]*0.1, 0.0, 1.0, 0.0) But that won’t satisfy you, because the solution won’t work any more, if the mouse leaves the window. You’ve to center the mouse in the middle of … Read more
GL_UNPACK_ALIGNMENT specifies the alignment requirements for the start of each pixel row in memory. By default GL_UNPACK_ALIGNMENT is set to 4. This means each row of the texture is supposed to have a length of 4*N bytes. You specify a 2*2 texture with the data: 255, 0, 0, 255, 0, 0, 255, 0, 0, 255, … Read more
Ok here comes the extend answer. The reason why this sometimes happens and sometimes not depends on the order of your entities. If you experiment with two simple spheres, one transparent and one not, you will see that when the sphere that is transparent is added later it will be drawn above the opaque object … Read more
This error is because Big Sur no longer has the OpenGL library nor other system libraries in standard locations in the file system and instead uses a cache. PyOpenGL uses ctypes to try to locate the OpenGL library and it fails to find it. Fixing ctypes in Python so that it will find the library … Read more