Abstract: The way to get OpenGL data from 3DS file is introduced based on OpenGL display process and 3DS file data organization. After discussing the function of normal vector in OpenGL, a new method to find normal vectors from 3DS data is given, and this new method is tenfold faster than existing one. The usage of key frame data in 3DS file is given so that the objects in 3DS file can be displayed on their right positions.

Key words: computer application, display 3DS model with OpenGL, normal vector solving, data transform