De Amicis R., Fiorentino M., Stork A., Monno G. (2003). 3D-Tape Drawing in Virtual and Augmented Reality. XIII ADM - XV INGEGRAF International Conference. International Conference on Tools and Methods Evolution in Engineering Design, June 4th and June 6th, 2003, Naples, Italy. CDROM.

1. Dr. Raffaele De AmicisDr. Raffaele De Amicis
Fondazione Graphitech, Rovereto, ItalyFondazione Graphitech, Rovereto, Italy
Dr. Michele Fiorentino, Prof. GiuseppeDr. Michele Fiorentino, Prof. Giuseppe
MonnoMonno
Politecnico di Bari, ItalyPolitecnico di Bari, Italy
Dr. André StorkDr. André Stork
Fraunhofer IGD, Darmstadt, GermanyFraunhofer IGD, Darmstadt, Germany
3D-Tape Drawing in Virtual and Augmented3D-Tape Drawing in Virtual and Augmented
RealityReality

2. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
OverviewOverview
• Objectives /Description of Work
• Current use of VRand ARwithin the Design Process
• Approach /Curve input - 3DTaping
• 3D-Tape Drawing in..
» Virtual
» Augmented Reality

3. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Research OverviewResearch Overview
developing modeling techniques suitable forcreating and modifying free form
surfaces in 3Dspace
There are two main requirements:
• creative/artistic requirements call for intuitive and fast methods to create
high quality visual images (models)
• CADbased, industrial requirements call for data transparency, enabling
painless and seamless connections between systems, while providing ways
to establish mathematical accuracy of shapes

4. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Description of workDescription of work
•Create and edit 3Dcurves and generate and modify free formsurfaces in virtual
space.
•The challenge is twofold:
» First, we need techniques that allow users to sketch free-form surfaces
in 3D space that conform to their expectations, minimizing the need to
modify the surface.
» Second, interaction techniques have to be devised that allow users to
manipulate free-form surfaces intuitively and in real time.
•User-centric approach.
•Precision of the interactive free-formgeneration/manipulation process has also to
be addressed.

5. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Current use of VR and AR within the DesignCurrent 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

6. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Workflow for Aesthetic DesignWorkflow for Aesthetic Design
Classic Workflow
New Workflow
Optimized for
Aesthetic Design

7. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
The BackgroundThe Background
The usercan:
• 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.
Studierstube
Open Inventor
Visualization
Independend Main Layer
CAD Function / Data
ACIS

8. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Curve input - 3D TapingCurve input - 3D Taping
What is taping?
A two-handed method to create characteristic curves with physical tape.
While the left hand is fixing the tape to the ground, the right hand defines the curvature of the
curve.
Taping gives nice, smooth curves – betteras a one-handed method.
Used for1:1 scale drawings but also forproposing design changes to physical models

9. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
The IdeaThe Idea
Develop a new 3D interaction technique for aiding the sketching of polylines, curves
and surfaces, in Virtual and Augmented Reality so-called 3D-Tape Drawing

10. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
3D-Tape Drawing in Virtual and Augmented Reality3D-Tape Drawing in Virtual and Augmented Reality
• Transposition into a two-handed interaction technique
• Virtual 3D tape drawing in free space (not only in 2D planes (as in
Balakrishnan
et al.) or curves created on curved surfaces (Grossmann et al)
• Virtual 3D tape drawing in Augmented and Virtual Realities
Virtual Reality set-up:Virtual Reality set-up:
• Virtual Table or PowerWall
• active or passive stereo
• wireless optical tracking
• tangible user interface elements
-Mirror plane
-Working plane
-etc.
Augmented Reality set-up:Augmented Reality set-up:
• User with HMD
• Video-mixing
• Optical see-though

11. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
3D-Tape Drawing in Augmented Reality3D-Tape Drawing in Augmented Reality

12. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
3D-Tape Drawing in Virtual Reality3D-Tape Drawing in Virtual Reality

13. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Virtual 3D-Tape DrawingVirtual 3D-Tape Drawing

14. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
Dr. Ing. Raffaele De AmicisDr. Ing. Raffaele De Amicis
DirettoreDirettore
Via F. Zeni, 8Via F. Zeni, 8
38068, Rovereto (TN)38068, Rovereto (TN)
Tel.: 0464 443 450Tel.: 0464 443 450
Fax.: 0464 443 470Fax.: 0464 443 470
www.graphitech.itwww.graphitech.it
wwwwww.inigraphics.net.inigraphics.net

15. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
G r a p h i T e c h & I N I – G r a p h I c s N e t

16. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
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

17. 3D-Tape Drawing in Virtual and Augmented Reality
R. De Amicis, M.
Fiorentino, A.
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