Ray Tracing in Non-Constant Media

Stam, Jos; Languénou, Éric

doi:10.1007/978-3-7091-7484-5_23

Cited by 36 publications

(31 citation statements)

References 13 publications

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“…Likewise, techniques that leverage the GPU for interactive display of refraction effects typically rely on Snell's law [Davis and Wyman 2007;Wyman 2005]. In contrast, Stam and Languénou [1996] describe how equations derived from geometric optics can be used to trace curved light rays through regions with non-constant index of refraction. Like Ihrke et al [2007], we adopt this elegant approach for volumes containing inhomogeneous materials.…”

Section: Related Workmentioning

confidence: 99%

Interactive relighting of dynamic refractive objects

Sun¹,

Zhou²,

Stollnitz³

et al. 2008

ACM SIGGRAPH 2008 Papers

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We present a new technique for interactive relighting of dynamic refractive objects with complex material properties. We describe our technique in terms of a rendering pipeline in which each stage runs entirely on the GPU. The rendering pipeline converts surfaces to volumetric data, traces the curved paths of photons as they refract through the volume, and renders arbitrary views of the resulting radiance distribution. Our rendering pipeline is fast enough to permit interactive updates to lighting, materials, geometry, and viewing parameters without any precomputation. Applications of our technique include the visualization of caustics, absorption, and scattering while running physical simulations or while manipulating surfaces in real time.

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Section: Related Workmentioning

confidence: 99%

Interactive relighting of dynamic refractive objects

Sun¹,

Zhou²,

Stollnitz³

et al. 2008

ACM SIGGRAPH 2008 Papers

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“…Of the rendering methods currently in use, the ones closest to the wave theories of light are the ones based on geometrical optics. This type of rendering was introduced by Stam and Languénou [1996]. Geometrical optics is a simplification of Maxwell's equations which assumes that the wavelength of light is so small that we can think of light as rays following trajectories which are not necessarily straight.…”

Section: Realistic Image Synthesismentioning

confidence: 99%

The Aristotelian rainbow

Frisvad

Christensen

Falster

2007

Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia

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Figure 1: A rainbow rendered in real-time using Aristotle's theory for rainbow formation. AbstractDevelopments in the graphics discipline called realistic image synthesis are in many ways related to the historical development of theories of light. And theories of light will probably continue to inspire the ongoing search for realism in graphics. To nurture this inspiration, we present the first in-depth, source-based historical study that pinpoints events with relevance for graphics in the development of theories of light. We also show that ancient mathematical models for light scattering phenomena may still find a use in the branch of realistic image synthesis concerned with real-time rendering. As an example we use Aristotle's theory of rainbow formation to construct a method for real-time rendering of rainbows. This example serves as an invitation to use the overview and references provided in this paper, not only for understanding where many of the physical concepts used in graphics come from, but also for finding more mathematical and physical models that are useful in graphics.

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“…To allow for that type of situations, we define a hot spot as an increase in temperature at a certain position in space, which affects its nearby region. To obtain the new atmospheric profile as influenced by the hot spot we first need to obtain the new temperature distribution created by it; we use the formula proposed by Stam [29] (Eq. (14)), which is based on experimental data found in the optical sciences literature [30]:…”

Section: Hot Spotsmentioning

confidence: 99%

Simulation of atmospheric phenomena

Gutiérrez

Serón

Muñoz

et al. 2006

Computers & Graphics

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This paper presents a physically based simulation of atmospheric phenomena. It takes into account the physics of non-homogeneous media in which the index of refraction varies continuously, creating curved light paths. As opposed to previous research on this area, we solve the physically based differential equation that describes the trajectory of light. We develop an accurate expression of the index of refraction in the atmosphere as a function of wavelength, based on real measured data. We also describe our atmosphere profile manager, which lets us mimic the initial conditions of real-world scenes for our simulations. The method is validated both visually (by comparing the images with the real pictures) and numerically (with the extensive literature from other areas of research such as optics or meteorology). The phenomena simulated include the inferior and superior mirages, the Fata Morgana, the Novaya-Zemlya, the Viking's end of the world, the distortions caused by heat waves and the green flash. r

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Ray Tracing in Non-Constant Media

Cited by 36 publications

References 13 publications

Interactive relighting of dynamic refractive objects

Interactive relighting of dynamic refractive objects

The Aristotelian rainbow

Simulation of atmospheric phenomena

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