报告时间：2015年12月28日（星期一），下午13：30；
报告地点：浙江大学紫金港校区蒙民伟楼CAD&CG国家重点实验室402室
报告题目：Parallel, Realistic and Controllable Terrain Synthesis
报告人：James Gain
主持人：金小刚 教授
Abstract: The challenge in terrain synthesis for virtual environments is to provide a combination of precise user control over landscape form, with interactive response and visually realistic results. This talk covers a system that builds on parallel pixel-based texture synthesis to enable interactive creation of an output terrain from a database of height field exemplars. The system also provide modelers with control over height and surrounding slope by means of constraint points and curves; a paint-by-numbers interface for specifying the local character of terrain; and coherence controls that allow localization of changes to the synthesized terrain. Together these contributions provide a level of realism that, based on user experiments, is indistinguishable from real source terrains; user control sufficient for precise placement of a variety of landforms, such as cliffs, ravines and mesas; and synthesis times of 165ms for a 1024^2 terrain grid.
演讲题目：可并行化，逼真的，可控制的地形合成方法
摘要：对于虚拟环境中的地形生成来说，最大的挑战莫过于提供一个综合系统，这系统既能使得用户能精确的控制地形的形态，又能达到可交互级别的反应速度，还能提供逼真的视觉效果。这个演讲就将描述这么个系统，一个从高度场数据库中导出来的样本数据，通过可并行化的纹理像素点的合成处理，实现可交互的创作地形的方法。这个系统里，建模师可利用约束点以及曲线来控制地形的高度以及其周围的倾斜度； 有一个按数填图的指定地形参数的界面；以及针对合成地形进行局部修改的相关控制技术。就用户实验的结果来看，这些方法的使用使得虚拟地形合成的逼真度与真实地形已别无区别，用户也能充分控制并精确定位不同种类的地形地貌，譬如悬崖，山涧以及平顶山。对于一个1024×1024的地形网格来说，其合成速度是165毫秒。
Bio:James Gain is an Associate Professor in the Department of Computer Science at the University of Cape Town and a member of its High-Performance Computing Laboratory. He obtained his PhD entitled "Enhancing Spatial Deformation for Virtual Sculpting" in 2000 from the University of Cambridge. His research interests cover primarily geometric and procedural modelling. He has also worked in the application of high performance computing and visualization to computational chemistry, geomatics and radio astronomy. James Gain has served two terms as President of Afrigraph, the African Computer Graphics Association, and in 2014 was a recipient of the University of Cape Town Distinguished Teachers' Award.
简历：James Gain目前担任南非开普敦大学的计算机系的副教授，同时也是其高性能计算实验室的成员。 他于2000获得剑桥大学的博士学位，其博士课题是“虚拟雕塑的空间变形优化处理”。他的研究方向主要在于几何图形以及程序化的建模方法。他的工作同时也涉及到高性能计算技术，以及针对计算化学，测绘学，以及射电天文学的可视化技术。在全非洲计算机图形协会里，James Gain已担任过两届非洲图形学大会的会长。在2014年，他被授予开普敦大学杰出教师奖。
