Mechanics is a subject based on experiments which usually are inconvenient and expensive in reality. Computer simulation is a reasonable substitute for real mechanics experiments, but traditional mechanics simulation approaches also have many disadvantages, such as low interactivity, low flexibility, low reusability, high development difficulty and etc. Considering that the traditional technique has many disadvantages, this paper proposes a new method-mechanics simulation based on game engine. In game engine, the physics engine provides a bottom technical support to make the mechanics apparatus run under the control of the physics laws. That increases the development efficiency greatly, and improves the interactivity, the flexibility and the reusability. This paper mainly discusses the advantages of mechanics simulation based on game engine, introduces the physics engine technology in detail and emphasizes on showing how to use game engine to simulate mechanical devices.
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