【作者】 高帅；

【导师】 尹勇； 孙霄峰；

【作者基本信息】 大连海事大学 ， 交通信息工程及控制， 2011， 硕士

【摘要】 随着21世纪的到来,现代远洋渔业捕捞对渔船船员的专业素质提出了很高的要求,因此迫切需要对渔船船员进行系统的专业培训。利用渔船操作模拟器对渔船船员进行培训,可以进行在各种复杂海况下渔船操纵、不同渔具渔法的训练,这种培训方式同传统培训方式相比,一方面可以缩短培训时间,节省培训成本,另一方面不存在任何风险。渔网的可视化效果直接影响到利用渔船操作模拟器对渔船船员进行培训的效果。因此,本文基于渔网的动力学分析和研究,实现渔网的实时三维可视化,将为渔船操作模拟器的研究与开发打下一定基础。本文主要做了以下几方面的创新性工作：1.通过对柔性物体可视化方法的分析,并结合网具系统的特点,论证了采用B样条方法进行渔网建模的可行性。2.提出并实现了一种基于物理模型的三次B样条插值曲线绘制渔网和手纲的方法。该方法用反求顶点法生成三次B样条插值曲线,然后对其进行纹理映射实现了网具系统的可视化。3.提出并实现了一种基于物理模型的B样条插值曲面的渔网可视化方法,提高了可视化系统的实时性。该方法通过简化网具系统的几何模型,减少模型中质量点的数目,将简化后的质量点作为型值点阵,构造三次B样条插值曲面,利用纹理对象拼接的方法完成曲面的纹理贴图。更多还原

【Abstract】 With the advent of the 21st century, modern pelagic fishery make higher requirements for the professional skill of crews of fishboat. So it’s an urgent need for crews to be trained professionally. Crews of fishboat can be trained for fishing vessel handling and using different fishing gear in a variety of complex sea conditions by using fishing simulator.Compared with traditional training methods, this training on the one hand can reduce the training time and save the training costs, on the other hand there is no risk.The visualization of fishing net has directly impact on the training effects for crews who be trained with the fishing simulator. Therefore, this dissertation focuses on the real-time visualization of fishing net based on research on the hydrodynamic of fishing net,which lay a foundation for the development of fishing simulator. The innovative contributions of this dissertation summarized here are:1. The feasibility of fishing net modeling with B-spline methods is verified after analyzing the visualization methods of flexible objects and the characteristics of fishing net.2. A method of rendering fishing net and bridle with cubic B-spline interpolation curve based on physical model is proposed and realized.This method constructs cubic B-spline interpolation curve with the method of vertex inversed solution,then visualization of fishing net is realized by texture mapping.3. A method of visualization of fishing net with cubic B-spline interpolation surface based on physical model is proposed and realized,which improve the real-time visualization of fishing net.This method simplifies the geometric model of fishing net and reduces the number of mass points,then reconstruction of cubic B-spline interpolation surface by the way of regarding the simplified mass points as lattice of data points is realized.The texture mapping of the surface is realized by the method of stitching texture object.更多还原