Algorithms for Spherical Harmonic Lighting

Ian Lisle; Tracy Huang

Algorithms for Spherical Harmonic Lighting

Ian Lisle, Tracy Huang

Research output: A Conference proceeding or a Chapter in Book › Conference contribution › peer-review

8 Citations (Scopus)

30 Downloads (Pure)

Abstract

Spherical harmonic (SH) lighting models require efficient and general libraries for evaluation of SH functions and of Wigner matrices for rotation. We introduce an efficient algebraic recurrence for evaluation of SH functions, and also implement SH rotation via Wigner matrices constructed for the real SH basis by a recurrence. Using these algorithms, we provide a freely distributable C / OpenGL implementation for SH diffuse unshadowed, shadowed and inter-reflected models. Our implementation allows flexible switching of scene, light probe, SH degree and lighting model at run time.

Original language	English
Title of host publication	GRAPHITE 2007: Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia
Editors	S Spencer
Place of Publication	New York
Publisher	Association for Computing Machinery (ACM)
Pages	235-238
Number of pages	4
ISBN (Print)	9781595939128
Publication status	Published - 2007
Event	GRAPHITE 2007 - Perth, Australia Duration: 1 Dec 2007 → 4 Dec 2007

Conference

Conference	GRAPHITE 2007
Country/Territory	Australia
City	Perth
Period	1/12/07 → 4/12/07

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title = "Algorithms for Spherical Harmonic Lighting",

abstract = "Spherical harmonic (SH) lighting models require efficient and general libraries for evaluation of SH functions and of Wigner matrices for rotation. We introduce an efficient algebraic recurrence for evaluation of SH functions, and also implement SH rotation via Wigner matrices constructed for the real SH basis by a recurrence. Using these algorithms, we provide a freely distributable C / OpenGL implementation for SH diffuse unshadowed, shadowed and inter-reflected models. Our implementation allows flexible switching of scene, light probe, SH degree and lighting model at run time. ",

author = "Ian Lisle and Tracy Huang",

year = "2007",

language = "English",

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pages = "235--238",

editor = "S Spencer",

booktitle = "GRAPHITE 2007: Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia",

publisher = "Association for Computing Machinery (ACM)",

address = "United States",

note = "GRAPHITE 2007 ; Conference date: 01-12-2007 Through 04-12-2007",

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Algorithms for Spherical Harmonic Lighting. / Lisle, Ian; Huang, Tracy.
GRAPHITE 2007: Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia . ed. / S Spencer. New York: Association for Computing Machinery (ACM), 2007. p. 235-238.

Research output: A Conference proceeding or a Chapter in Book › Conference contribution › peer-review

TY - GEN

T1 - Algorithms for Spherical Harmonic Lighting

AU - Lisle, Ian

AU - Huang, Tracy

PY - 2007

Y1 - 2007

N2 - Spherical harmonic (SH) lighting models require efficient and general libraries for evaluation of SH functions and of Wigner matrices for rotation. We introduce an efficient algebraic recurrence for evaluation of SH functions, and also implement SH rotation via Wigner matrices constructed for the real SH basis by a recurrence. Using these algorithms, we provide a freely distributable C / OpenGL implementation for SH diffuse unshadowed, shadowed and inter-reflected models. Our implementation allows flexible switching of scene, light probe, SH degree and lighting model at run time.

AB - Spherical harmonic (SH) lighting models require efficient and general libraries for evaluation of SH functions and of Wigner matrices for rotation. We introduce an efficient algebraic recurrence for evaluation of SH functions, and also implement SH rotation via Wigner matrices constructed for the real SH basis by a recurrence. Using these algorithms, we provide a freely distributable C / OpenGL implementation for SH diffuse unshadowed, shadowed and inter-reflected models. Our implementation allows flexible switching of scene, light probe, SH degree and lighting model at run time.

M3 - Conference contribution

SN - 9781595939128

SP - 235

EP - 238

BT - GRAPHITE 2007: Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia

A2 - Spencer, S

PB - Association for Computing Machinery (ACM)

CY - New York

T2 - GRAPHITE 2007

Y2 - 1 December 2007 through 4 December 2007

ER -

Algorithms for Spherical Harmonic Lighting

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