Practical Shading of Height Fields and Meshes using Spherical Harmonic Exponentiation

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dc.contributor.authorGiraud, Audeen_US
dc.contributor.authorNowrouzezahrai, Dereken_US
dc.contributor.editorJaakko Lehtinen and Derek Nowrouzezahraien_US
dc.date.accessioned2015-06-23T05:04:14Z
dc.date.available2015-06-23T05:04:14Z
dc.date.issued2015en_US
dc.description.abstractInteractively computing smooth shading effects from environmental lighting, such as soft shadows and glossy reflections, is a challenge in scenes with dynamic objects. We present a method to efficiently approximate these effects in scenes comprising animating objects and dynamic height fields, additionally allowing interactive manipulation of view and lighting. Our method extends spherical harmonic (SH) exponentiation approaches to support environmental shadowing from both dynamic blockers and dynamic height field geometry. We also derive analytic expressions for the view-evaluated BRDF, directly in the log-SH space, in order to support diffuse-to-glossy shadowed reflections while avoiding expensive basis-space product operations. We illustrate interactive rendering results using a hybrid, multi-resolution screen- and object-space visibility-marching algorithm that decouples geometric complexity from shading complexity.en_US
dc.description.sectionheadersShadowsen_US
dc.description.seriesinformationEurographics Symposium on Rendering - Experimental Ideas & Implementationsen_US
dc.identifier.doi10.2312/sre.20151161en_US
dc.identifier.pages1-8en_US
dc.identifier.urihttps://doi.org/10.2312/sre.20151161en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectComputer Graphics [I.3.3]en_US
dc.subjectThree Dimensional Graphics and Realismen_US
dc.subjectDisplay Algorithmsen_US
dc.titlePractical Shading of Height Fields and Meshes using Spherical Harmonic Exponentiationen_US
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