| In the field of virtual battlefield simulation, the photorealistic and real-time reproduction of the special effect greatly enhances the fidelity of simulation, making warfighters understand the battle environment more intuitively. In recent years, the growing scale of the virtual naval battle and increasingly complex battlefield environment leads to the increasingly high demand of the effectiveness and efficiency of real-time simulation. The research of efficient simulation and rendering has been an important and difficult issue. As view of the above problems, this paper focuses on the special efficacy simulation of the weapons, ship tracks and rain. The following is the main content:1. The characteristic appearances of the flame, explosions and underwater explosions features were analyzed. With reference to a wealth of physical models, we simplified the physical model and motion model of each of these special effects, and decomposed the implementation task. We completed the realistic simulation with the particle system.2. We analyzed the characteristic appearances of ship tracks’ features, and divided them into the bow wave, stern wave and boat traveling wave. For the simulation of the boat traveling wave, we studied the Kelvin wave model, implemented it with particle system; we also proposed an improved method, make the particle system disturbance the height information of the sea vertex.3. For the simulation of rain in a naval battle context, we analyzed the movement feature of raindrops, and implemented in a simplified way using particle system. Physi cal and movement models were built to describe the real process of rain. Different amo unt of rainfall was achieved through parameter tuning.We have integrated all of these special effects into an individual module of our 3D e-chart system. We further analyzed the architecture of the particle system, and designed a GPU based acceleration method using OpenGL programmable pipeline. |
