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| non-linear beam tracing on a gpu | |
| Liu Baoquan; Wei Li-Yi; Yang Xu; Ma Chongyang; Xu Ying-Qing; Guo Baining; Wu Enhua | |
| 2011 | |
| Source | COMPUTER GRAPHICS FORUM
 |
| ISSN | 0167-7055 |
| Volume | 30Issue:8Pages:2156-2169 |
| English Abstract | Beam tracing combines the flexibility of ray tracing and the speed of polygon rasterization. However, beam tracing so far only handles linear transformations; thus, it is only applicable to linear effects such as planar mirror reflections but not to non-linear effects such as curved mirror reflection, refraction, caustics and shadows. In this paper, we introduce non-linear beam tracing to render these non-linear effects. Non-linear beam tracing is highly challenging because commodity graphics hardware supports only linear vertex transformation and triangle rasterization. We overcome this difficulty by designing a non-linear graphics pipeline and implementing it on top of a commodity GPU. This allows beams to be non-linear where rays within the same beam do not have to be parallel or intersect at a single point. Using these non-linear beams, real-time GPU applications can render secondary rays via polygon streaming similar to how they render primary rays. A major strength of this methodology is that it naturally supports fully dynamic scenes without the need to pre-store a scene database. Utilizing our approach, non-linear ray tracing effects can be rendered in real-time on a commodity GPU under a unified framework.; Beam tracing combines the flexibility of ray tracing and the speed of polygon rasterization. However, beam tracing so far only handles linear transformations; thus, it is only applicable to linear effects such as planar mirror reflections but not to non-linear effects such as curved mirror reflection, refraction, caustics and shadows. In this paper, we introduce non-linear beam tracing to render these non-linear effects. Non-linear beam tracing is highly challenging because commodity graphics hardware supports only linear vertex transformation and triangle rasterization. We overcome this difficulty by designing a non-linear graphics pipeline and implementing it on top of a commodity GPU. This allows beams to be non-linear where rays within the same beam do not have to be parallel or intersect at a single point. Using these non-linear beams, real-time GPU applications can render secondary rays via polygon streaming similar to how they render primary rays. A major strength of this methodology is that it naturally supports fully dynamic scenes without the need to pre-store a scene database. Utilizing our approach, non-linear ray tracing effects can be rendered in real-time on a commodity GPU under a unified framework. |
| Indexed Type | SCI |
| Keyword | Nonlinear Beam Tracing Real-time Rendering Gpu Techniques Reflection Refraction |
| Department | Liu Baoquan Univ Bedfordshire Luton Beds England. Liu Baoquan; Wu Enhua Chinese Acad Sci Inst Software State Key Lab Comp Sci Beijing 100864 Peoples R China. Ma Chongyang; Guo Baining Tsinghua Univ Beijing Peoples R China. Wu Enhua Univ Macau Macao Peoples R China. |
| Subject | Computer Science |
| Sponsorship | National 973 Research Grant2009CB320802; NSFC60833007; Marie Curie project GAMVolVisFP7-PEOPLE-IIF-2008-236120 |
| Language | 英语 |
| WOS ID | WOS:000297317200002 |
| Citation statistics | |
| Content Type | 期刊论文 |
| URI | http://ir.iscas.ac.cn/handle/311060/16140 |
| Collection | 中国科学院软件研究所 |
| Recommended Citation GB/T 7714 | Liu Baoquan,Wei Li-Yi,Yang Xu,et al. non-linear beam tracing on a gpu[J]. COMPUTER GRAPHICS FORUM,2011,30(8):2156-2169. |
| APA | Liu Baoquan.,Wei Li-Yi.,Yang Xu.,Ma Chongyang.,Xu Ying-Qing.,...&Wu Enhua.(2011).non-linear beam tracing on a gpu.COMPUTER GRAPHICS FORUM,30(8),2156-2169. |
| MLA | Liu Baoquan,et al."non-linear beam tracing on a gpu".COMPUTER GRAPHICS FORUM 30.8(2011):2156-2169. |
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