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3D Sketching with Profile Curves [chapter]

Florian Levet, Xavier Granier, Christophe Schlick
2006 Lecture Notes in Computer Science  
In this paper, we present some sketching interactions for 3D modeling, based on a set of two different bidimensional sketches (profile curve and silhouette curve).  ...  By using these two sketches and combining them with a gesture grammar, a very large variety of shapes (including shapes with topological holes) can be easily produced by our interactive modeling environment  ...  But, with our system, we created it with only five sketches. We first sketched the hammer silhouette curve. We then did a first local selection of its head and sketched a square profile curve.  ... 
doi:10.1007/11795018_11 fatcat:3bn5e6olfjaldcnoee6dn662pa

Fast character modeling with sketch-based PDE surfaces

Lihua You, Xiaosong Yang, Junjun Pan, Tong-Yee Lee, Shaojun Bian, Kun Qian, Zulfiqar Habib, Allah Bux Sargano, Ismail Kazmi, Jian J. Zhang
2020 Multimedia tools and applications  
profile curves, and uses secondary profile curves and key cross-section profile curves to further modify the deformed template model.  ...  The sketch-guided global modeling generates a character model from three different levels of sketched profile curves called primary, secondary and key cross-section curves in three orthographic views.  ...  Sketch on a 3D model is to sketch a few local profile curves and generate a local model from these profile curves.  ... 
doi:10.1007/s11042-020-09060-9 fatcat:pufozqs45venjjgkdpya5wgyci

Towards an Intelligent Framework for Pressure-based 3D Curve Drawing [article]

Chan-Yet Lai, Nordin Zakaria
2014 arXiv   pre-print
In this paper, we explore the use of pressure in 3D curve drawing.  ...  We propose instead a framework which applies signal processing techniques tuned to individual curve type. A neural network classifier is used as a curve classifier.  ...  in sketching a pressure based 3D spiral curve.  ... 
arXiv:1402.5187v1 fatcat:6epwdysh7bb63fazm2ks6j7ouy

Laplacian-based Design: Sketching 3D Shapes

Bin Sheng, Enhua Wu
2006 International Journal of Virtual Reality  
Since inferring 3D shape from 2D sketches is an one to many function with no unique solution, we propose to interpret the given 2D curve to be the projection of the 3D curve that has minimum curvature  ...  Finally, the shape of the triangular surface mesh that follows the 3D profile curves is computed using harmonic interpolation by solving Laplacian equations.  ...  profiles in 3D.  ... 
doi:10.20870/ijvr.2006.5.3.2700 fatcat:2zqeectovjgt3jgbcjctpodw5y

Agile 3D Sketching with Air Scaffolding

Yongkwan Kim, Sang-Gyun An, Joon Hyub Lee, Seok-Hyung Bae
2018 Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems - CHI '18  
In our agile 3D sketching workflow with air scaffolding, in which hand motion and pen drawing complement each other, (a) the user makes unconstrained hand movements in the air to quickly generate rough  ...  shapes to be used as scaffolds, (b) uses the scaffolds as references and draws finer details with them (c) in an iterative and progressive manner to produce a high-fidelity 3D concept sketch of a steering  ...  captures the overall shapes and defining a sketch plane across the scaffolds, (c) drawing a dominant profile with pen sketching, (d) iteratively adding cross sections along the dominant profile by defining  ... 
doi:10.1145/3173574.3173812 dblp:conf/chi/KimALB18 fatcat:hzqoal2wkrba5kbhvqccrun46i

Sketch2CAD: Sequential CAD Modeling by Sketching in Context [article]

Changjian Li, Hao Pan, Adrien Bousseau, Niloy J. Mitra
2020 arXiv   pre-print
To overcome the strong ambiguity with parsing 2D sketches, we observe that in a sketching sequence, each step makes sense and can be interpreted in the context of what has been drawn before.  ...  In our system, this context corresponds to a partial CAD model, inferred in the previous steps, which we feed along with the input sketch to a deep neural network in charge of interpreting how the model  ...  To recover the profile curve, we first determine the 3D plane it lies on. For one of the 2D profile strokes, it has an intersection point with each of the two ellipses.  ... 
arXiv:2009.04927v1 fatcat:y3flx3h4hja4hlkxwfmfjelkhu


Cătălin IANCU
2016 Fiabilitate şi Durabilitate  
There are presented the features that are used for modeling, and then the steps that must be taken in order to obtain the 3D model of a coil and the whole auger gear and also the unfolded coil for subsequent  ...  All sketch entities, including guide curves and profiles, can be contained in a single 3D sketch.  ...  Lofted bends in sheet metal parts use two open-profile 3D sketches that are connected by a loft [4] .  ... 
doaj:8df33d21c7eb411babe6da92451684b8 fatcat:6mma4ifewrgbxhojujszu4b36y

A conceptual design tool: A sketch and fuzzy logic based system

S-F Qin, D K Wright, I N Jordanov
2001 Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture  
The system can not only accept sketched input, but also users' interactive input of 2D and 3D primitives.  ...  curves.  ...  Curve 3D conceptual models of a camera: (a) sketches for the body box; (b) recognised 3D box;  ... 
doi:10.1243/0954405011515073 fatcat:gmyihd6uszhjtjhep56qiv3sku

Sketch-based subdivision models

A. Nasri, W. Bou Karam, F. Samavati
2009 Proceedings of the 6th Eurographics Symposium on Sketch-Based Interfaces and Modeling - SBIM '09  
The corresponding limit surface interpolates the profile curves with the capability of local control across these curves and of the model in general.  ...  From the constructed control polygons of the sketched curves, a coarse and quad dominant control mesh is generated with few extraordinary vertices or faces.  ...  Furthermore, our models interpolate the sketched profile curves.  ... 
doi:10.1145/1572741.1572751 fatcat:h55oglabqvhsznt6toiyuqnzte

Sketch-Based Subdivision Models [article]

A. Nasriy, W. Bou Karam, F. Samavati
2009 Sketch-Based Interfaces and Modeling  
The corresponding limit surface interpolates the profile curves with the capability of local control across these curves and of the model in general.  ...  From the constructed control polygons of the sketched curves, a coarse and quad dominant control mesh is generated with few extraordinary vertices or faces.  ...  The red vertices are the control polygon of the sketched profile curve. Figure 7 : 7 Figure 7: A 3-blad fan without (top) and with sharp features across the profile curves.  ... 
doi:10.2312/sbm/sbm09/053-060 fatcat:qpdqctrwtrdqhn4j33cxc3th4a

Engineering Sketch Generation for Computer-Aided Design [article]

Karl D.D. Willis, Pradeep Kumar Jayaraman, Joseph G. Lambourne, Hang Chu, Yewen Pu
2021 arXiv   pre-print
Both models generate curve primitives without the need for a sketch constraint solver and explicitly consider topology for downstream use with constraints and 3D CAD modeling operations.  ...  We find in our perceptual evaluation using human subjects that both CurveGen and TurtleGen produce more realistic engineering sketches when compared with the current state-of-the-art for engineering sketch  ...  In Figure 6 we demonstrate how engineering sketches generated by CurveGen with closed loop profiles can be lifted into 3D using the extrude modeling operation in a procedural manner.  ... 
arXiv:2104.09621v1 fatcat:xxm2z53t2nh7tfbryfa5kusyma

Topology-Consistent Design for 3D Freeform Meshes with Harmonic Interpolation [chapter]

Bin Sheng, Enhua Wu
2007 Lecture Notes in Computer Science  
In this paper, we firstly interpret the given 2D curve to be the projection of the 3D curve that has the minimum curvature.  ...  Then we propose a topology-consistent strategy to trace the simple faces on the interconnecting 3D curves. By using the face tracing algorithm, our system can identify the 3D surfaces automatically.  ...  profiles in 3D.  ... 
doi:10.1007/978-3-540-74873-1_16 fatcat:xo5bwhpm3ngg5gtmbuuuy3uj34

Towards a Methodology for Retrieving Suspects Using 3D Facial Descriptors [chapter]

Naoufel Werghi, Hassen Drira
2017 Communications in Computer and Information Science  
In this paper, We propose a first investigation towards a methodology for exploiting 3D facial images for suspect retrieval in the context of crime investigation.  ...  An alternative or complementary scheme would be to define a system of 3D facial attributes that can fit human verbal face description and use them to annotate face databases.  ...  Background on Shape Analysis of Profile Curves Let β : I → R 2 , represent a parameterized curve representing a nasal profile, where I = [0, 1].  ... 
doi:10.1007/978-3-319-60654-5_8 fatcat:wqoykxrbvnhwhpgmfgs5zsinjy

Sketch-Line Interactions for 3D Image Visualization and Analysis [chapter]

T. McInerney, Y. S. Shih
2012 Lecture Notes in Computer Science  
Directly sketching line segments on image slices, or curve segments on the surfaces of objects in volume rendered or surface rendered 3D data, is an effective means by which to quickly and simply transfer  ...  This paper explores the effectiveness of an interaction model based on user-sketched line segments and curve segments, together known as sketch-lines.  ...  A series of 3D sketch-lines can be converted to profile curves, connected and subdivided to form the smooth closed surface mesh.  ... 
doi:10.1007/978-3-642-33179-4_65 fatcat:yoaxez3nijcjpetjlusevntqde

Sketching as a solid modeling tool

Lynn Eggli, Beat D. Brüderlin, Gershon Elber
1995 Proceedings of the third ACM symposium on Solid modeling and applications - SMA '95  
Feat ures can be sketched on the surfaces of 3d objects, using the same 2d-and 3d techniques. This way, objects of medium complexity can be sketched in seconds.  ...  Lines, circles, arcs, or B-spline curves are automatically distinguished, and interpreted from these strokes.  ...  These techniques are partly adaptions of conventional 3d techniques for a sketch based environment, in combination with the new 2d sketching and manipulation techniques.  ... 
doi:10.1145/218013.218079 dblp:conf/sma/EggliBE95 fatcat:umty5pu63jbvhloh5nr32vea7u
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