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Moana: crashing waves

Published: 30 July 2017 Publication History

Abstract

We used two different solutions for generating crashing waves for more than 40 shots in Moana. Our profile curve based wave deformer was developed and used for art-directed design of shapes, motion, and composition of running and crashing waves. In contrast to previously developed wave deformers, we designed a cross section shape animation by providing a series of profile curves which represented the animation keys. These profile curves could be hand plotted curves or mathematically calculated changing profiles, which means any kind of choreographic touch could be applied for designing the wave shapes. We could design multiple crashing waves for huge scale tsunami scenes and we could art direct the timing and composition of the waves which would fit well with the character animation and camera works.
For scenarios demanding more realism, motion complexity and physical accuracy, we adopted a fully simulated approach. Our APIC-based fluid solver [Jiang et al. 2015] was equipped with control mechanisms allowing us to precisely choreograph the motion of breaking waves to the needs of a specific shot. Though more expensive than procedural approaches, this solution was much more preferable for "hero" shots with close up interaction with boats and characters.

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References

[1]
Chenfanfu Jiang, Craig Schroeder, Andrew Selle, Joseph Teran, and Alexey Stomakhin. 2015. The Affine Particle-in-cell Method. ACM Trans. Graph. 34, 4, Article 51 (July 2015), 10 pages.
[2]
G.G. Stokes. 1847. On the theory of oscillatory waves. Trans. of the Cambridge Philosophical Society (184).
[3]
Alexey Stomakhin and Andrew Selle. 2017. Fluxed Animated Boundary Method. ACM Trans. Graph. 36, 4, Article 68 (July 2017), 68:1--68:11 pages.

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Published In

cover image ACM Conferences
SIGGRAPH '17: ACM SIGGRAPH 2017 Talks
July 2017
158 pages
ISBN:9781450350082
DOI:10.1145/3084363
Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author.

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Association for Computing Machinery

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Publication History

Published: 30 July 2017

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  1. procedural animation
  2. simulation

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