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ACM Transactions on Graphics (TOG), Volume 36 Issue 2, April 2017

Azimuthal Scattering from Elliptical Hair Fibers
Pramook Khungurn, Steve Marschner
Article No.: 13
DOI: 10.1145/2998578

The appearance of hair follows from the small-scale geometry of hair fibers, with the cross-sectional shape determining the azimuthal distribution of scattered light. Although previous research has described some of the effects of non-circular...

Functional Characterization of Intrinsic and Extrinsic Geometry
Etienne Corman, Justin Solomon, Mirela Ben-Chen, Leonidas Guibas, Maks Ovsjanikov
Article No.: 14
DOI: 10.1145/2999535

We propose a novel way to capture and characterize distortion between pairs of shapes by extending the recently proposed framework of shape differences built on functional maps. We modify the original definition of shape differences slightly and...

Constructing Intrinsic Delaunay Triangulations from the Dual of Geodesic Voronoi Diagrams
Yong-Jin Liu, Dian Fan, Chun-Xu Xu, Ying He
Article No.: 15
DOI: 10.1145/2999532

Intrinsic Delaunay triangulation (IDT) naturally generalizes Delaunay triangulation from R2 to curved surfaces. Due to many favorable properties, the IDT whose vertex set includes all mesh vertices is of particular interest in polygonal...

Scalable Locally Injective Mappings
Michael Rabinovich, Roi Poranne, Daniele Panozzo, Olga Sorkine-Hornung
Article No.: 16
DOI: 10.1145/2983621

We present a scalable approach for the optimization of flip-preventing energies in the general context of simplicial mappings and specifically for mesh parameterization. Our iterative minimization is based on the observation that many distortion...

Domain of Attraction Expansion for Physics-Based Character Control
Mazen Al Borno, Michiel Van De Panne, Eugene Fiume
Article No.: 17
DOI: 10.1145/3009907

Determining effective control strategies and solutions for high-degree-of-freedom humanoid characters has been a difficult, ongoing problem. A controller is only valid for a subset of the states of the character, known as the domain of...

Interactive Relighting in Single Low-Dynamic Range Images
Jung-Hsuan Wu, Suguru Saito
Article No.: 18
DOI: 10.1145/3034185

This article addresses the relighting of outdoor and large indoor scenes illuminated by nondistant lights, which has seldom been discussed in previous works. We propose a method for users to interactively edit the illumination of a scene by moving...

Unmixing-Based Soft Color Segmentation for Image Manipulation
Yağiz Aksoy, Tunç Ozan Aydin, Aljoša Smolić, Marc Pollefeys
Article No.: 19
DOI: 10.1145/3002176

We present a new method for decomposing an image into a set of soft color segments that are analogous to color layers with alpha channels that have been commonly utilized in modern image manipulation software. We show that the resulting...

Interactive Design and Stability Analysis of Decorative Joinery for Furniture
Jiaxian Yao, Danny M. Kaufman, Yotam Gingold, Maneesh Agrawala
Article No.: 20
DOI: 10.1145/3054740

High-quality hand-made furniture often employs intrinsic joints that geometrically interlock along mating surfaces. Such joints increase the structural integrity of the furniture and add to its visual appeal. We present an interactive tool...

Fast Weather Simulation for Inverse Procedural Design of 3D Urban Models
Ignacio Garcia-Dorado, Daniel G. Aliaga, Saiprasanth Bhalachandran, Paul Schmid, Dev Niyogi
Article No.: 21
DOI: 10.1145/2999534

We present the first realistic, physically based, fully coupled, real-time weather design tool for use in urban procedural modeling. We merge designing of a 3D urban model with a controlled long-lasting spatiotemporal interactive simulation of...

Multi-Contact Locomotion Using a Contact Graph with Feasibility Predictors
Changgu Kang, Sung-Hee Lee
Article No.: 22
DOI: 10.1145/2983619

Multi-contact locomotion that uses both the hands and feet in a complex environment remains a challenging problem in computer animation. To address this problem, we present a contact graph, which is a motion graph augmented by learned feasibility...