the eraser pen: a new interaction paradigm for curve sketching in 3d

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R. De Amicis, F. Bruno, A. Stork, M. L. Luchi GRIS, TU Darmstadt Fraunhofer-IGD, Darmstadt Università della Calabria The Eraser Pen: The Eraser Pen: A New Interaction A New Interaction Paradigm for Paradigm for Curve Sketching Curve Sketching in 3D in 3D

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Page 1: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

GRIS, TU Darmstadt Fraunhofer-IGD, DarmstadtUniversità della Calabria

The Eraser Pen: The Eraser Pen: A New Interaction A New Interaction Paradigm for Paradigm for Curve Sketching Curve Sketching in 3Din 3D

Page 2: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

2R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

IntroductionIntroduction

Shape design using intuitive 3D interaction techniques for free-form modeling increases its contribution to...

• ...visual appeal • ...ergonomic performance• ...a product’s commercial competitiveness through product differentiation

Page 3: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

3R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Current Practice and ObstaclesCurrent Practice and Obstacles

• Current CAD tools do not serve well shape design

• Can not handle quick sketching concepts.

• Serious difficulties are encountered in the styling phase of the design process

• As a result, designers prefer to use manual sketching tools

Page 4: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

4R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Current use of VR and AR within the Design Current use of VR and AR within the Design ProcessProcess

Virtual Validation Process

CAS model Virtual reality tools

CIM CAPE

DMU Structural analysis CFD, NVH Safety analysis

STYLING

ENGINEERING

MANUFACTURING

• Anticipating decisions and analysis• Realistic digital display

Page 5: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

5R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Workflow for Aesthetic DesignWorkflow for Aesthetic Design

Classic Workflow

New Workflow Optimized for Aesthetic Design

Page 6: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

7R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Related WorkRelated Work

• 3-Draw: A tool for designing 3D shapes. E. Sachs, et. al. No visual correspondence

• Ext. SKETCH by Forsberg, Zeleznik et. al. Imprecise sketching in 2D & 3D

• An Interface for Sketching 3D Curves, J.M. Cohen, et. al. Curves and shadows can be ‘overdrawn’ to change their shape.

• Free-Form Surface Design in a Virtual Environment, C.-C. P. Chu et. al Indirect and distant interaction with a ray

• Surface Drawing, Schroeder et al. Drawing polygonal structures in 3D at VT using a glove

Page 7: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

8R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The BackgroundThe BackgroundThe user can:

• create 2D primitives, • generate 3D primitives, • sketch curves and surfaces• perform Boolean operations,• sweep faces,• access the history of an object:– to change it partially or– to copy primitives,

• delete objects.

Page 8: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

9R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The IdeaThe Idea

Define a new interaction technique for aiding the sketching of polylines, curves and surfaces.

Page 9: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

10R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The ImplementationThe Implementation

P5

P1

P2

P4

P3

X

Y

Z

P5

P4

P3

P0

if ( > max)draw

elseerase

Page 10: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

11R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Extruded curve!!

Change!!

The Eraser PenThe Eraser Pen

Generation of an extruded surface

• First sketch• The red spot highlights the part that is redone• Surface by curve extrusion.

combines the creation and deletion process, rewriting

the rubber and pencil metaphor in just one tool.

Page 11: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

12R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The Erase PenThe Erase Pen concept applied to model a skin surface

Page 12: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

13R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The Erase Pen ..a videoThe Erase Pen ..a video

Page 13: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

14R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

The Erase Pen ..a videoThe Erase Pen ..a video

Page 14: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

15R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

Sketching free-form surfaces in Mixed Realities

Engineering applicationsEngineering applications

Page 15: The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

The Eraser Pen: A New Interaction Paradigm for Curve Sketching in 3D

16R. De Amicis, F. Bruno, A. Stork, M. L. Luchi

 IGD-Darmstadt

Univ. of Technology-Darmstadt ZGDV-Darmstadt

CAPCom business & solutions -Darmstadt IGD-Frankfurt Univ. of Frankfurt

IGD-Rostock

Univ. of Rostock

ZGDV-Rostock

Ctr. for Research in Computer Graphics-Providence

Brown Univ.- Providence

Rhode Island School of Design- Providence

Univ. do Minho- Azurem Centro de Computacao Grafica Univ. of Technology-Nayang Ctr. for Advanced Media Technology- Nayang

Univ. of Technology-Vienna

Thank you !Thank you !