Goblins by spheroidal weathering

Authors:
M. Beardall;M. Farley;D. Ouderkirk;C. Reimschussel;J. Smith;M. Jones;P. Egbert
Affiliations:
Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah;Department of Computer Science, Brigham Young U., Provo, Utah
Venue:
NPH'07 Proceedings of the Third Eurographics conference on Natural Phenomena
Year:
2007

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Abstract

Height map models of terrain are computationally efficient but can not represent terrain with concave surfaces. We present an algorithm for generating sandstone goblins using a simulation of spheroidal weathering. Sandstone goblins are a kind of hoodoo which are characterized by rounded concave shapes. The weathering simulation uses bubbles centered on axis aligned voxels to approximate geometry-dependent effects of spheroidal weathering. We demonstrate that the algorithm, together with appropriate surface textures, produces visually plausible goblins at near interactive speeds for most simulation parameters.