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* If you suspect an error in your OpenGL code, try using the [http://www.opengl.org/sdk/docs/man/xhtml/glGetError.xml glGetError()] command to find the location of the error, then [http://www.opengl.org/sdk/docs/man/xhtml/gluErrorString.xml gluErrorString()] to parse the error message. * There is a [http://www.opengl.org/wiki/Common_Mistakes web page on common OpenGL mistakes]. * For debugging under Linux, the command line debugger [http://sourceware.org/gdb/current/onlinedocs/gdb/ gdb] and the GUI wrapper around it [http://www.gnu.org/s/ddd/manual/html_mono/ddd.html ddd] are among the most popular debugging tools, both of which allow tracing through C++ code step by step and displaying the content of variables. * Tip by Kristian: If your shader code builds but won't use the shaders, and you are using Linux and a laptop with hybrid graphics systems, try [https://github.com/MrMEEE/ironhide/ Ironhide].

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