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With the virtual surgery simulation system playing an increasing role in the medical filed, this paper puts forward a method of reconstructing a virtual gallbladder geometric model based on the OpenGL graphics library. Firstly, we can use 3ds Max software to build a gallbladder model and write program to read and store the information only related to the contour vertexes and facets of the gallbladder model in Visual C++ environment. Then the information of vertexes and facets are indexed and sorted, so that they are related to each other and can produce realistic deformation in the latter part of the virtual surgery. Finally we can create a realistic model of the virtual gallbladder geometric through the later rendering such as anti-aliasing.

A geometric modeling method based on OpenGL in virtual gallbladder surgery