Sketch-based generation and editing of quad meshes

Takayama, Kenshi; Panozzo, Daniele; Sorkine-Hornung, Alexander; Sorkine‐Hornung, Olga

doi:10.1145/2461912.2461955

Cited by 53 publications

(53 citation statements)

References 29 publications

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“…Here we project C into the xy plane and use e.g. the method of Peng et al [2014] or Takayama et al [2013] to fill its interior by a coarse quad mesh, applying subdivision to refine it. A standard relaxation scheme finds a mesh, having that combinatorics, which fits C (left hand figure):…”

Section: Initializationmentioning

confidence: 99%

Form-finding with polyhedral meshes made simple

et al. 2014

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We solve the form-finding problem for polyhedral meshes in a way which combines form, function and fabrication; taking care of userspecified constraints like boundary interpolation, planarity of faces, statics, panel size and shape, enclosed volume, and last, but not least, cost. Our main application is the interactive modeling of meshes for architectural and industrial design. Our approach can be described as guided exploration of the constraint space whose algebraic structure is simplified by introducing auxiliary variables and ensuring that constraints are at most quadratic. Computationally, we perform a projection onto the constraint space which is biased towards low values of an energy which expresses desirable "soft" properties like fairness. We have created a tool which elegantly handles difficult tasks, such as taking boundary-alignment of polyhedral meshes into account, planarization, fairing under planarity side conditions, handling hybrid meshes, and extending the treatment of static equilibrium to shapes which possess overhanging parts.

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Section: Initializationmentioning

confidence: 99%

Form-finding with polyhedral meshes made simple

et al. 2014

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“…We refer the readers to [Olsen et al 2009] for a comprehensive survey of earlier work about sketch-based modeling interfaces. Some recent work has been applied to the modeling of photo compositions [Chen et al 2009], quad meshes [Takayama et al 2013], indoor scenes [Xu et al 2013], 3D curve networks [Xu et al 2014a], and part assemblies [Huang et al 2014]. Recently Cherin et al [2014] proposed a method to fit a single 2D sketch with a piecewise 3D helix curve.…”

Section: Previous Workmentioning

confidence: 99%

Single-view hair modeling using a hairstyle database

et al. 2015

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Human hair presents highly convoluted structures and spans an extraordinarily wide range of hairstyles, which is essential for the digitization of compelling virtual avatars but also one of the most challenging to create. Cutting-edge hair modeling techniques typically rely on expensive capture devices and significant manual labor. We introduce a novel data-driven framework that can digitize complete and highly complex 3D hairstyles from a single-view photograph. We first construct a large database of manually crafted hair models from several online repositories. Given a reference photo of the target hairstyle and a few user strokes as guidance, we automatically search for multiple best matching examples from the database and combine them consistently into a single hairstyle to form the large-scale structure of the hair model. We then synthesize the final hair strands by jointly optimizing for the projected 2D similarity to the reference photo, the physical plausibility of each strand, as well as the local orientation coherency between neighboring strands. We demonstrate the effectiveness and robustness of our method on a variety of hairstyles and challenging images, and compare our system with state-of-the-art hair modeling algorithms.

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“…The quad faces are then formed by tracing isoparameter curves in this parametrization, sometimes using an interactive workflow [Krishnamurthy and Levoy 1996;Takayama et al 2013]. Bommes et al [2011] proposed a method which removes helical configurations from quad meshes, thereby improving the global structure.…”

Section: Related Workmentioning

confidence: 99%

Interactive shape modeling using a skeleton-mesh co-representation

2014

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Figure 1: The input triangle mesh on the left is converted to our polar-annular mesh representation (PAM) (a). It was refitted to the original model and subdivided (b,c) and then edited on an iPad using our PAM based sculpting tool (d). AbstractWe introduce the Polar-Annular Mesh representation (PAM). A PAM is a mesh-skeleton co-representation designed for the modeling of 3D organic, articulated shapes. A PAM represents a manifold mesh as a partition of polar (triangle fans) and annular (rings of quads) regions. The skeletal topology of a shape is uniquely embedded in the mesh connectivity of a PAM, enabling both surface and skeletal modeling operations, interchangeably and directly on the mesh itself. We develop an algorithm to convert arbitrary triangle meshes into PAMs as well as techniques to simplify PAMs and a method to convert a PAM to a quad-only mesh. We further present a PAM-based multi-touch sculpting application in order to demonstrate its utility as a shape representation for the interactive modeling of organic, articulated figures as well as for editing and posing of pre-existing models.

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Sketch-based generation and editing of quad meshes

Cited by 53 publications

References 29 publications

Form-finding with polyhedral meshes made simple

Form-finding with polyhedral meshes made simple

Single-view hair modeling using a hairstyle database

Interactive shape modeling using a skeleton-mesh co-representation

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