FastV: From‐point Visibility Culling on Complex Models

Chandak, Anish; Antani, Lakulish; Taylor, Micah; Manocha, Dinesh

doi:10.1111/j.1467-8659.2009.01501.x

Cited by 25 publications

(27 citation statements)

References 33 publications

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“…However, the proposed splitting operations make these techniques computationally inefficient; instead, it seems that an even higher performance with exact algorithms can be achieved by a two-phase approach that avoids splitting of the frustumshaped beams. 132 In the first phase, a conservative beam tree is constructed using potentially visible sets, 132 and in the second phase, the actual ISs are verified as in the original image-source technique.…”

mentioning

confidence: 99%

Overview of geometrical room acoustic modeling techniques

Savioja¹,

Svensson

2015

The Journal of the Acoustical Society of America

300

190

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Computerized room acoustics modeling has been practiced for almost 50 years up to date. These modeling techniques play an important role in room acoustic design nowadays, often including auralization, but can also help in the construction of virtual environments for such applications as computer games, cognitive research, and training. This overview describes the main principles, landmarks in the development, and state-of-the-art for techniques that are based on geometrical acoustics principles. A focus is given to their capabilities to model the different aspects of sound propagation: specular vs diffuse reflections, and diffraction.

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mentioning

confidence: 99%

Overview of geometrical room acoustic modeling techniques

Savioja¹,

Svensson

2015

The Journal of the Acoustical Society of America

300

190

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“…Many interactive applications such as games or VR need 30 − 60 Hz update rates and we may need faster methods to achieve such a performance on current commodity hardware. We are also investigating using frustum tracing for very accurate GA simulations [4]. Finally, we would like to use RESound for other applications such as tele-conferencing and design of sound-based user interfaces.…”

Section: Discussionmentioning

confidence: 99%

RESound

Taylor

Chandak

Antani

et al. 2009

Proceedings of the 17th ACM International Conference on Multimedia

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We present an interactive algorithm and system (RESound) for sound propagation and rendering in virtual environments and media applications. RESound uses geometric propagation techniques for fast computation of propagation paths from a source to a listener and takes into account specular reflections, diffuse reflections, and edge diffraction. In order to perform fast path computation, we use a unified ray-based representation to efficiently trace discrete rays as well as volumetric ray-frusta. RESound further improves sound quality by using statistical reverberation estimation techniques. We also present an interactive audio rendering algorithm to generate spatialized audio signals. The overall approach can render sound in dynamic scenes allowing source, listener, and obstacle motion. Moreover, our algorithm is relatively easy to parallelize on multi-core systems. We demonstrate its performance on complex game-like and architectural environments.

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“…Recent video games such as Crackdown use ray tracing to compute low-order sound propagation effects. In order to overcome the sampling issues inherent in ray tracing, techniques based on volume tracing [Funkhouser et al 1998;Taylor et al 2009] and image sources [Allen and Berkley 1979;Laine et al 2009;Chandak et al 2009] have been developed. For static scenes, radiosity [Tsingos and Gascuel 1997;Nosal et al 2004;Alarcao et al 2009] or radiance transfer [Siltanen et al 2007;Siltanen et al 2009] methods can be used to model reflections from surfaces with arbitrary BRDFs.…”

Section: Related Workmentioning

confidence: 99%

Interactive sound propagation using compact acoustic transfer operators

et al. 2012

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We present an interactive sound propagation algorithm that can compute high orders of specular and diffuse reflections as well as edge diffractions in response to moving sound sources and a moving listener. Our formulation is based on a precomputed acoustic transfer operator, which we compactly represent using the Karhunen-Loeve transform. At runtime, we use a twopass approach that combines acoustic radiance transfer with interactive ray tracing to compute early reflections as well as higher-order reflections and late reverberation. The overall approach allows accuracy to be traded off for improved performance at runtime, and has a low memory overhead. We demonstrate the performance of our algorithm on different scenarios, including an integration of our algorithm with Valve's Source game engine.

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FastV: From‐point Visibility Culling on Complex Models

Cited by 25 publications

References 33 publications

Overview of geometrical room acoustic modeling techniques

Overview of geometrical room acoustic modeling techniques

RESound

Interactive sound propagation using compact acoustic transfer operators

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