英语翻译There are numerous solid models in the scene of reservoir construction,including many static models and dynamic models (e.g.the simulation of the water flow in pipelines).Both geometric modeling and image modeling are required for static

英语翻译There are numerous solid models in the scene of reservoir construction,including many static models and dynamic models (e.g.the simulation of the water flow in pipelines).Both geometric modeling and image modeling are required for static
英语翻译
There are numerous solid models in the scene of reservoir construction,including many static models and dynamic models (e.g.the simulation of the water flow in pipelines).Both geometric modeling and image modeling are required for static models in the scene.Geometric modeling means constructing a model the same or similar to the real-world objects in shapes,and image modeling means using methods such as texture mapping and lighting to enhance the realistic of models.In geometric modeling,regular models are constructed using parametric modeling technology,presenting models through a series of characteristic parameters and the satisfied geometric relations among them.This method can simplify the modeling process and improve the efficiency.While irregular models are built through basic points,lines,polygons based on objects’ contour,using soft wares such as AutoCAD and 3DS.The dynamic model of simulating water flowing in pipeline is more complex to construct.As the pipeline is very long,if we use particle system to simulate the water flow,hundreds of millions of particles are required,which will make the computer crash.So another method,Real-Time Boolean Operation,is adopted instead.The steps are introduced as follows.
(1) Built water pipe model using geometric modeling method,and then at the elevation of the pipe axis build a water body whose diameter smaller than the water pipeline to simulate water flow.
(2) Similarly,create a new plane at inlet,which has a normal opposed to the direction of the water flow and should be larger than the pipe cross-section so as to make Boolean operation with the water body.
(3) Create an animation by key-frame method,making the plane moving forward along the pipeline until the pipeline outlet.
(4)Select the water body,and then take Boolean operation between the water body and the plan.Thus,in the first frame there is no water body after Boolean operation,for the plane is located at inlet where doesn’t cross with the water body and has a normal opposed to the direction of the water flow,which just expresses that the flow hasn’t entered the pipeline yet.In the last frame the plane is located at the pipeline outlet and after Boolean operation the water body is just as long as the pipeline,which means that the water has flown from the inlet to the outlet.Using the proposed method,Boolean operation between the water body and the plane can be achieved in every frame in the period of the plane moving,which is just Real-Time Boolean Operation and implements the process of the water flow,from nothing to something,and from short to long.The simulation effect of water flow is realized to some extend by adjusting the pipeline transparency and using Real-Time Boolean Operation.

英语翻译There are numerous solid models in the scene of reservoir construction,including many static models and dynamic models (e.g.the simulation of the water flow in pipelines).Both geometric modeling and image modeling are required for static
在水库施工现场有许多实体模型,包括静态模型和动态模型(例如,模拟管道中水流).现场的静态模型需要几何建模和图像建模.几何建模是指建造的模型要与实物形状相同或相似；图像建模是指通过纹理映射与照明等方法增强模型的真实感.在几何建模中,常规模型要使用参数建模技术,通过多种特性参数和相互间令人满意的几何关系来对模型加以呈现.这种方法能够简化建模过程,提高效率.非常规模型的建模要使用基于物体轮廓的基本点,线,多边形,和诸如AutoCAD和3DS这样的软件.模拟管道水流的动态模型的建模更加复杂.由于管道很长,如果使用粒子系统模拟水流,所需要的数百万粒子会让计算机崩溃.因此我们采用了实时布尔计算.下面介绍一下建模的步骤：

There are numerous solid models in the scene of reservoir construction, including many static models and dynamic models (e.g. the simulation of the water flow in pipelines). Both geometric modeling an...

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There are numerous solid models in the scene of reservoir construction, including many static models and dynamic models (e.g. the simulation of the water flow in pipelines). Both geometric modeling and image modeling are required for static models in the scene. Geometric modeling means constructing a model the same or similar to the real-world objects in shapes, and image modeling means using methods such as texture mapping and lighting to enhance the realistic of models. In geometric modeling, regular models are constructed using parametric modeling technology, presenting models through a series of characteristic parameters and the satisfied geometric relations among them. This method can simplify the modeling process and improve the efficiency. While irregular models are built through basic points, lines, polygons based on objects’ contour, using soft wares such as AutoCAD and 3DS. The dynamic model of simulating water flowing in pipeline is more complex to construct. As the pipeline is very long, if we use particle system to simulate the water flow, hundreds of millions of particles are required, which will make the computer crash. So another method, Real-Time Boolean Operation, is adopted instead. The steps are introduced as follows.
(1) Built water pipe model using geometric modeling method, and then at the elevation of the pipe axis build a water body whose diameter smaller than the water pipeline to simulate water flow.
(2) Similarly, create a new plane at inlet, which has a normal opposed to the direction of the water flow and should be larger than the pipe cross-section so as to make Boolean operation with the water body.
(3) Create an animation by key-frame method, making the plane moving forward along the pipeline until the pipeline outlet.
(4)Select the water body, and then take Boolean operation between the water body and the plan. Thus, in the first frame there is no water body after Boolean operation, for the plane is located at inlet where doesn’t cross with the water body and has a normal opposed to the direction of the water flow, which just expresses that the flow hasn’t entered the pipeline yet. In the last frame the plane is located at the pipeline outlet and after Boolean operation the water body is just as long as the pipeline, which means that the water has flown from the inlet to the outlet. Using the proposed method, Boolean operation between the water body and the plane can be achieved in every frame in the period of the plane moving, which is just Real-Time Boolean Operation and implements the process of the water flow, from nothing to something, and from short to long. The simulation effect of water flow is realized to some extend by adjusting the pipeline transparency and using Real-Time Boolean Operation.

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