Mutable elastic models for sculpting structured shapes

Milliez, Antoine; Wand, Michael; Cani, Marie-Paule; Seidel, Hans‐Peter

doi:10.1111/cgf.12022

Cited by 17 publications

(23 citation statements)

References 58 publications

(87 reference statements)

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“…The specific case of 1D distribution of aligned details could be handled using the work by Milliez et al [21], where parts of aligned structured 3D shapes defined by puzzle shape grammars are duplicated.…”

Section: Limitations and Discussionmentioning

confidence: 99%

Real-time continuous self-replicating details for shape deformation

Rohmer

Hahmann

Cani

2015

Computers & Graphics

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a b s t r a c tWe address continuous free-form sculpting of 3D models that carry self-similar geometric details. In addition to being maintained when the model is bent or twisted, repetitive details should be duplicated rather than deformed in stretched regions, so that their distribution and appearance are preserved. Doing so in a temporally coherent way is essential in applications where the user sculpts through continuous deformation gestures. We propose a simple, yet effective solution for achieving such temporal coherence while enabling duplication of details. Our method maintains the set of existing details during stretch but seamlessly grows new ones in between. Similarly, some of the details progressively fade out when a region shrinks. Our solution is example-based: it uses the triangles of the initial support surface as exemplars to be selected and re-used in deformed regions. As our results show, our method achieves continuous free-form deformation of complex models while best preserving, at each time step, the properties and appearance of their initial distribution of details.

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Section: Limitations and Discussionmentioning

confidence: 99%

Real-time continuous self-replicating details for shape deformation

Rohmer

Hahmann

Cani

2015

Computers & Graphics

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“…In addition to physically-based virtual plasticine [28], sculpting systems have proven to be successful for editing as rigid as possible objects [29] or shapes with nested features [30], and structured shapes, such as architectural models [31]. Peytavie et al [32] introduced a hybrid model combining material piles and an implicit representation to interactively sculpt 3D terrain models featuring overhangs and caves.…”

Section: User Gesturesmentioning

confidence: 99%

Sculpting Mountains: Interactive Terrain Modeling Based on Subsurface Geology

Cordonnier

Cani

Beneš

et al. 2018

IEEE Trans. Visual. Comput. Graphics

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Abstract-Most mountain ranges are formed by the compression and folding of colliding tectonic plates. Subduction of one plate causes large-scale asymmetry while their layered composition (or stratigraphy) explains the multi-scale folded strata observed on real terrains. We introduce a novel interactive modeling technique to generate visually plausible, large scale terrains that capture these phenomena. Our method draws on both geological knowledge for consistency and on sculpting systems for user interaction. The user is provided hands-on control on the shape and motion of tectonic plates, represented using a new geologically-inspired model for the Earth crust. The model captures their volume preserving and complex folding behaviors under collision, causing mountains to grow. It generates a volumetric uplift map representing the growth rate of subsurface layers. Erosion and uplift movement are jointly simulated to generate the terrain. The stratigraphy allows us to render folded strata on eroded cliffs. We validated the usability of our sculpting interface through a user study, and compare the visual consistency of the earth crust model with geological simulation results and real terrains.

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“…Early systems [SHR * 92] positioned such manipulators in world space and have remained in use to the present day [Aut15]. Domain-specific widgets attached to the subobjects being edited are also a common subject in graphics, and are used to visualize available translations [SLZ * 13, MYY * 10], deformations [Rad99,BWKS11,MWCS13], or dimensions of an orientated plane [LWW08]. Krecklau et al [KK12] propose that authors pre-define several views in which procedural modeling manipulators are well positioned on screen (in contrast to traditional dimensioning techniques in which dimension lines are optimized only for one static view).…”

Section: D Manipulatorsmentioning

confidence: 99%

Interactive Dimensioning of Parametric Models

Kelly

Wonka

Mueller

2015

Computer Graphics Forum

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Figure 1: Existing systems for dimension line layout produce static positions in world space (a). After rotating the view, multiple artifacts are visible, e.g. the dimension lines occlude the model, intersect other dimension lines, or they no longer have a desirable spacing from the model and other dimension lines (b). Our proposed solution enables a user to interactively inspect the model while dimension lines are well positioned in a view-dependent manner, i.e. the dimension lines adapt when the camera moves (c,d). We demonstrate that dimension lines can be used for editing a parametric model, as well as extensions that allow the visualization and control of model parameters other than distances (e,f). AbstractWe propose a solution for the dimensioning of parametric and procedural models. Dimensioning has long been a staple of technical drawings, and we present the first solution for interactive dimensioning: a dimension line positioning system that adapts to the view direction, given behavioral properties. After proposing a set of design principles for interactive dimensioning, we describe our solution consisting of the following major components. First, we describe how an author can specify the desired interactive behavior of a dimension line. Second, we propose a novel algorithm to place dimension lines at interactive speeds. Third, we introduce multiple extensions, including chained dimension lines, controls for different parameter types (e.g. discrete choices, angles), and the use of dimension lines for interactive editing. Our results show the use of dimension lines in an interactive parametric modeling environment for architectural, botanical, and mechanical models.

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Mutable elastic models for sculpting structured shapes

Cited by 17 publications

References 58 publications

Real-time continuous self-replicating details for shape deformation

Real-time continuous self-replicating details for shape deformation

Sculpting Mountains: Interactive Terrain Modeling Based on Subsurface Geology

Interactive Dimensioning of Parametric Models

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