园林场景的虚拟展示平台

发布时间：2018-04-01 17:18

本文选题：虚拟园林场景　切入点：虚拟天气系统　出处：《浙江大学》2015年硕士论文

【摘要】：随着图形学与3D技术的发展,园林、景观设计领域越来越多地使用3D展示应用来进行辅助设计与成果展示。然而,虚拟园林场景的展示应用的制作存在如下问题：首先,园林场景展示应用的开发与制作复杂性较高但需求相近,在单个场景中制作和使用的3D特效却不可复用；其次,制作完成的3D场景展示应用不可编辑调整,对于应用的更新维护往往极为复杂；第三,在园林等场景的展示应用中往往需要进行大规模的植被渲染,并要求植物体现出四季变换特点,而传统的植被渲染手段往往不能兼顾真实性与渲染效率。针对以上问题,本文进行了园林场景虚拟展示平台的设计与开发,完成了能够导入园林场景并通过相对简单的交互生成场景的虚拟展示应用的平台,实现了特效与场景的复用性,并使得完成后的3D应用能够很方便进行更新和维护。平台开发过程中贡献主要包括：设计实现了适用于3D展示的虚拟天气特效系统与虚拟四季特效系统。通过调整天气与季节参数,使用户能够轻易调整园林场景中的天气与季节特效。提出了一种基于GPU的落叶运动实时渲染算法。该方法首先由实验数据构建落叶基础轨迹库,然后建立落叶轨迹的低维表示,在GPU中完成对轨迹片段的实时重建,充分利用了GPU的多线程计算优势,完成了大场景落叶效果的实时渲染。
[Abstract]:With the development of graphics and 3D technology, the use of 3D display should be used in the field of landscape design and landscape design more and more. However, the production of virtual landscape scene display application has the following problems: first of all, The complexity of development and production of landscape scene display application is high, but the requirement is similar, the 3D special effects produced and used in a single scene can not be reused. Secondly, the 3D scene display application can not be edited and adjusted. The update and maintenance of the application is often very complicated. Third, in the landscape scene display applications, it is often necessary to carry out large-scale vegetation rendering, and the plants are required to reflect the characteristics of the four seasons. But the traditional vegetation rendering method often can not give attention to the authenticity and the rendering efficiency. In view of the above problems, this paper designs and develops the virtual display platform of the landscape scene. The platform of virtual display application, which can import landscape scene and generate scene through relatively simple interaction, is completed, and the reusability of special effects and scene is realized. During the development of the platform, the main contributions include the design and implementation of the virtual weather special effects system and the virtual four seasons special effects system suitable for 3D display. Whole weather and seasonal parameters, This paper presents a real-time rendering algorithm of deciduous motion based on GPU, which can easily adjust the weather and seasonal effects in garden scenes. Firstly, the database of deciduous basic track is constructed from experimental data, and then the low-dimensional representation of deciduous track is established. The real-time reconstruction of track segments is completed in GPU, and the real-time rendering of large scene deciduous effect is completed by taking full advantage of the multi-thread computing advantage of GPU.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP391.41

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