Freestyle: Sculpting meshes with self-adaptive topology

Stãnculescu, Lucian; Chaine, Raphaëlle; Cani, Marie-Paule

doi:10.1016/j.cag.2011.03.033

Cited by 31 publications

(42 citation statements)

References 13 publications

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“…Finally, a new flip-or-split pass is run to insure that no edge longer than detail persists. This updating routine is similar to the one used in [11], where convergence is discussed. It promotes high quality triangles without using any additional relaxation step that would tangentially move the vertices, with additional costs.…”

Section: Quasi-uniform Meshes With Featuresmentioning

confidence: 99%

“…Further, since the shape is frequently re-polygonized there is no trivial transfer of embedded mesh features between two different tessellations. A recent free-form mesh sculpting system Freestyle [11] enabled this topological flexibility of volume sculpting for quasi-uniform meshes. Another vein of object-aware deformations are based on variational methods [12], where the mesh attempts to preserve its local structure when undergoing large scale deformations.…”

Section: Related Workmentioning

confidence: 99%

“…In order to promote simplicity and speed while accurately capturing deformations, we choose to maintain a quasi-uniform sampling at all levels of the structure: the quality criteria driving the updating step is that all edges must be smaller than a detail threshold, while also trying to keep a length larger than half the detail, similar to the refinement scheme described in [11].…”

Section: Quasi-uniform Meshes With Featuresmentioning

confidence: 99%

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Sculpting multi-dimensional nested structures

Stãnculescu¹,

Chaine²,

Cani³

et al. 2013

Computers & Graphics

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Solid shape is typically segmented into surface regions to define the appearance and function of parts of the shape; these regions in turn use curve networks to represent boundaries and creases, and feature points to mark corners and other shape landmarks. Conceptual modeling requires these multi-dimensional nested structures to persist throughout the modeling process, an aspect not supported, up to now, in free-form sculpting systems.We present the first shape sculpting framework that preserves and controls the evolution of such nested shape features. We propose a range of geometric and topological behaviors (such as rigidity or mutability) applied hierarchically to points, curves or surfaces in response to a set of typical free-form sculpting operations, such as stretch, shrink, split or merge. Our method is illustrated within a free-form sculpting system for self-adaptive quasi-uniform polygon meshes, where geometric and topology changes resulting from sculpting operations are applied to points, edges and triangular facets. We thus facilitate, for example, the persistence of sharp features that automatically split or merge with variable rigidity, even when the shape changes genus. Sculpting nested structures expands the capabilities of most conceptual design workflows, as exhibited by a suite of models created by our system.

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Section: Quasi-uniform Meshes With Featuresmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Quasi-uniform Meshes With Featuresmentioning

confidence: 99%

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Sculpting multi-dimensional nested structures

Stãnculescu¹,

Chaine²,

Cani³

et al. 2013

Computers & Graphics

Self Cite

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show abstract

“…Multimaterial surface tracking also requires the ability to handle collision-induced topology changes between regions that are initially disjoint, either merging them into one or establishing a new separating interface. Like previous authors [Brochu and Bridson 2009;Stanculescu et al 2011], we initiate merging when geometry comes within a user-defined proximity threshold. However, these existing two-phase approaches depend on a local zippering operation.…”

Section: Multimaterials Mergingmentioning

confidence: 99%

“…Proximity-Based Merging locally stitches proximate meshes, maintaining an intersection-free invariant via either conservative bounds on time step [Stanculescu et al 2011] or robust postcollision processing [Brochu and Bridson 2009]. The reliance on a kernel of simple, local mesh operations led us to extend this line of work to multiple materials, building on El Topo [Brochu and Bridson 2009].…”

Section: Triangle Meshes With Merging and Splittingmentioning

confidence: 99%

Multimaterial mesh-based surface tracking

Batty

Grinspun

2014

ACM Trans. Graph.

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Figure 1: Two-Droplet Collision: Using our multimaterial mesh-based surface tracker, two immiscible liquid droplets with different materials but identical physical properties impact symmetrically in zero gravity under strong surface tension. The collision merges the droplets so that a new interface separates the two liquids, and a non-manifold triple-curve is created where the two liquids meet the ambient air. AbstractWe present a triangle mesh-based technique for tracking the evolution of three-dimensional multimaterial interfaces undergoing complex deformations. It is the first non-manifold triangle mesh tracking method to simultaneously maintain intersection-free meshes and support the proposed broad set of multimaterial remeshing and topological operations. We represent the interface as a nonmanifold triangle mesh with material labels assigned to each halfface to distinguish volumetric regions. Starting from proposed application-dependent vertex velocities, we deform the mesh, seeking a non-intersecting, watertight solution. This goal necessitates development of various collision-safe, label-aware non-manifold mesh operations: multimaterial mesh improvement; T1 and T2 processes, topological transitions arising in foam dynamics and multiphase flows; and multimaterial merging, in which a new interface is created between colliding materials. We demonstrate the robustness and effectiveness of our approach on a range of scenarios including geometric flows and multiphase fluid animation.

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Be water my friend: mesh assimilation

Bukenberger

Lensch

2021

Vis Comput

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Inspired by the ability of water to assimilate any shape, if being poured into it, regardless if flat, round, sharp, or pointy, we present a novel, high-quality meshing method. Our algorithm creates a triangulated mesh, which automatically refines where necessary and accurately aligns to any target, given as mesh, point cloud, or volumetric function. Our core optimization iterates over steps for mesh uniformity, point cloud projection, and mesh topology corrections, always guaranteeing mesh integrity and $$\epsilon $$ ϵ -close surface reconstructions. In contrast with similar approaches, our simple algorithm operates on an individual vertex basis. This allows for automated and seamless transitions between the optimization phases for rough shape approximation and fine detail reconstruction. Therefore, our proposed algorithm equals established techniques in terms of accuracy and robustness but supersedes them in terms of simplicity and better feature reconstruction, all controlled by a single parameter, the intended edge length. Due to the overall increased versatility of input scenarios and robustness of the assimilation, our technique furthermore generalizes multiple established approaches such as ballooning or shrink wrapping.

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Freestyle: Sculpting meshes with self-adaptive topology

Cited by 31 publications

References 13 publications

Sculpting multi-dimensional nested structures

Sculpting multi-dimensional nested structures

Multimaterial mesh-based surface tracking

Be water my friend: mesh assimilation

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