| SimulationAutomobile driving simulator is the equipment which can simulate vehicle driving action. When using automobile driving simulator for driving training, the precision modes, textures and the visual senses provide virtual reality for driving simulator. It can be very effective for simulating a real vehicle.Currently the development status of automobile driving simulator technology at home and abroad, in terms of driving training simulator Human-Computer interaction techniques, this technology divided into two important fields:1. Driving simulators vision, delay time and the real-time, fidelity of the scene.2. The general plan of driving simulators, subsystem data simulation and alternate technique.The paper is according to the present problems of the large amount of data in the training scenes, the models lack of realism and the scene loading slowly, go into details about how to choose and create models.The main research works in this thesis are as follows:1. Using 3D Max discussed how to choose the best method to create models and how to do can reduce data of the 3D scenes. For example, trees, houses. Mainly expound how to cut the geographic information that can make interactive running on it. And at the same time, combining the software "Evariste" which developed by a French company OKTAL with 3D MAX discussed the method of create roads and how to get the road information.2. According to the problems of the large scenes loading slowly, using decomposition technique to achieve the scenes can fast loading in the system.3. Combining the software "SCANeRâ…¡", discussed create methods of the character models, the traffic lights models. In order to make the character models and the traffic lights can run in "SCANeRâ…¡", it need to do the special setting that can make the characters and the lights running in the system. 4. About the weather system in "SCANeRâ…¡", it needs to use the special module to write the script. It can add different situations in the scene. It offers the true weather simulation for driving simulation.5. About the traffic lights control system in "SCANeRâ…¡", it need to do the special set in RNS that can make all the vehicles can accord to the instructions of traffic lights, thereby simulate the real road condition.6. In "SCANeRâ…¡", the sound module is developed on OpenAL. In "SCANeRâ…¡", using the "Mice" module can load the various kinds of sounds in the scene.7. The multi-channel shadow-casting technique need to modify the "observer.cfg" file, and add the rearview mirror in the scene.Using the simulation environment which has the true feeling like driving in the vehicle, it can make the driver produced the illusion of Immersion, interaction and the feeling in a real field. At the same time, it improved the work efficiency for the Traffic training department effectively and reduced the risk of accidents, also reduced training costs.In the paper, using the modeling technique of visual system, the building models, vehicle models and the tree models are all optimized. The number of the polygonal faces is greatly decreased and the scene can be optimized. In terms of the vehicle models interactive techniques, the action of characters, the animation of traffic lights do a lot tests.Using "Evariste" to create the 3D scene which can be used in "SCANeRâ…¡", it makes the 2D to 3D come true. At the same time, using "SCANeRâ…¡" add the vehicles, pedestrians in the scene. Then use "Mice" to set their motion trails and behaviors.Visual software will load data as vehicles, pedestrian, scenery besides the road. These data indwell the virtual scene. These data will be compiled and then combined in a road file when loading scenes. This method increased loading time. This article provide a method in quickly load into the virtual environment.Programming the weather effect simulation is mainly through "SCANeRâ…¡". Add a variety of special scenarios through a control program in SCANeRâ…¡. SCANeRâ…¡can make weather like rain, snow, fog, wind, and etc, combine different weathers together and even can define time if you'd like to.We can kompilieren sound through a special control program in SCANeRâ…¡, we use "Mice" edit module load sounds into a scenario (such as grating and so on).Research on the distributed technique of multichannel screen display, it offers a lot technical support for visual simulation of driving simulator, and it can get the same feeling like driving in a real vehicle. Using "observer.cfg" file in SCANeRâ…¡, through increase channel make picture-in-picture effects to simulate wing mirrors, view mirror. It can achieve the aim of improve the efficiency of driving training, shorten the training period.With the quick development of computer science, driving simulator will constantly improve, simulation precision and fidelity need to upgrade. To achieve the aim of training a driver, we should build up a more abundant and verisimilar scenario. So, it is very important to constantly strive on developing visual system. |
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