Break the application run again when the character is rendered incorrectly.

Export all state variables and their values into a 'state variable snapshot' file.

Break the game application run when the character is rendered fine.

Using gDEBugger's OpenGL State Variables view, a developer can select OpenGL state variables and watch their values interactively.ДЇor example, if a game has a mode in which a certain character's shading looks fine, and another mode in which the character's shading looks wrong, the developer can: This black box model makes it hard to locate state variable related problems. However, when using a general purpose debugger, a developer cannot view state variable values, cannot put data breakpoints on state variables, and, at least in Microsoft Visual StudioВ®, cannot put breakpoints on OpenGL API functions that serve as their high-level access functions. These state variables, located inside the graphics system, are treated as 'global variables' that are repeatedly queried and changed by numerous OpenGL API functions and mechanisms. State variable related problemsДЄn OpenGL render context is a huge state variable container.

In this article we will demonstrate how gDEBugger transforms OpenGL application debugging tasks from a black box model to a white box model, letting the developer peer into OpenGL to see how individual OpenGL commands affect the graphics system. But, what happens when something goes wrong? How does the developer locate the OpenGL calls that caused the problem? When a developer works on top of OpenGL, he sees the graphics system as a 'black box ' the program issues thousands of API calls into it and 'magically' an image comes out of the system. It is not designed for ease of debugging.

The OpenGL API is designed to maximize graphics performance. Transforming OpenGL Debugging to a вЂњWhite BoxвЂќ Model

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