Based on the communication network Direct3D visual simulation engine design and implementationtheVisual Simulation (Visual Simulation) is used to realize 3 d space information visualization technology， it has a realistic Simulation effect and convenient operation method， can well satisfy the new plane avionics system design This paper designs and realizes an Direct3D based on the communication network visual simulation First， in this paper the characteristics of the visual simulation and the programming essentials Direct3D brief analysis of selection， and expounds the main reason for the Direct3D Secondly， put forward the visual simulation software， the total design project of the simulation software program and the software module partition the working process of the analysis of the various modules， explore the main functions and the relations among And then， based on the communication network of Direct3D visual simulation is the key technology of engine are analyzed and the study， introduces solutions discrete event simulation， Direct3D resource management and animation optimization and the mouse control technology， the key technology of the Finally， this essay discusses the Direct3D based on the communication network visual simulation software realization method， and in a more complex switched communication network as an example， the visual simulation， and the performance of the program was tested
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