【作者】 许庆功；

【导师】 李昌华；

【作者基本信息】 西安建筑科技大学 ， 计算机应用技术， 2008， 硕士

【摘要】 科学计算可视化是20世纪80年代后期提出并发展起来的一个新的研究领域。它的应用范围十分广泛,几乎涉及自然科学及工程技术的一切领域。计算流体力学就是科学计算可视化中重要的应用领域之一。随着计算机技术的不断进步和计算流体动力学(CFD)技术的不断发展,使得计算机的计算能力迅速提高,许多重要的图形、图像处理算法均可用硬件来实现,通过CFD数值计算获得的大量数据可以得到实时处理。本文以基于GPU的流场数据体绘制技术研究为核心。首先,介绍了三维空间数据场可视化算法与可编程图形处理器,研究了典型的体绘制算法并比较它们的异同,探讨了用体绘制技术和可编程图形处理器对流场数据进行可视化的可行性和必要性。其次,重点研究了流场中标量场的可视化技术,在此基础上,实现了基于GPU的三维纹理映射体绘制算法和光线投射算法。最后,给出两种算法的绘制结果。利用体绘制技术和可编程图形处理器对流场数据进行可视化,通过分析是可行的,取得了较好的绘制效果,提高了绘制速度。更多还原

【Abstract】 Visualization in Science Computing is an important research field brought forward and developed from the later 80s of the last century, which has a broad application in most science and technology field such as Computational fluid dynamics (CFD) and so on. In the past two decades, significant progress has been made in the computer technical and CFD. A lot of important arithmetic for producing graphics and pictures from data, including the data from CFD, could be realized by hardware.The Volume Rending for flow field data by GPU is the main task of the study. The 3D spatial data sets visualization arithmetic and GPU was introduced firstly. The typical Volume Rending arithmetic were described and compared. The feasibility and necessity to realize the visualization of flow field by Volume Rending and GPU were discussed. Secondly, the Visualization of scalar data sets was introduced as an emphasis and the volume rending arithmetic on the basis of GPU of 3D Texture Mapping and Ray-casting were carried out. The results by two arithmetic were given and analyzed.The visualization of flow field by Volume Rending technique and GPU was feasible both in theory and practice. A better drawing within less time could be obtained in this study.更多还原