Carlo H. SCarlo H. Sééquinquin

(Descriptive) Geometry – my love since high school

2D Geometry (Chip Layouts)2D Geometry (Chip Layouts)

Bell Labs, 1973: U.C. Berkley 1982:

CCD Camera RISC microcomputer

3D Geometry3D Geometry

Berkeley, 1994: U.C. Berkley 1996:

Soda Hall CyberCut – CyberBuild (WalkThru) (RP models and toys)

Art - Math ConnectionArt - Math Connection

ISAMA & Bridges Conferences (1998-2008)

MOSAIC 2000 (David Salesin, Univ. of WA)

Metal Sculpture at SIGGRAPH 2006Metal Sculpture at SIGGRAPH 2006

Artistic GeometryArtistic Geometry

Brent Collins 1997

Inspiration: Inspiration:

Brent Collins’ Brent Collins’

Pax MundiPax Mundi(1997)(1997)

SLIDE-GUI for “SLIDE-GUI for “Pax MundiPax Mundi” Shapes” ShapesGood combination of interactive 3D graphicsand parameterizable procedural constructs.

Viae GlobiViae Globi : ( : (roads on a sphereroads on a sphere))

Collins: Pax Mundi (1997) Séquin: Maloja (2001)

Emulation of Solstice (with J. Hamlin)Emulation of Solstice (with J. Hamlin)

The thick rail forms a {3,2} torus knot; there are 400 ribs inside

Parameter ChangesParameter Changes

Go from {3,2} torus knot to {2,3} torus knot

Ph.D. Thesis of James AndrewsPh.D. Thesis of James AndrewsExtracting the Generating ParadigmsExtracting the Generating Paradigms

Find a decomposition into simpler parameterizable entities, e.g., CSG primitives, generalized sweeps, curved surfaces . . .

Ph.D. Thesis by Raph LevienPh.D. Thesis by Raph LevienInterpolating Designer Curves (Interpolating Designer Curves (≈≈MVC)MVC)

Euler spirals (clothoids, Cornu spirals)

for interactive font design (and other CAD)

k s

Ph.D. Thesis by Pushkar JoshiPh.D. Thesis by Pushkar Joshi Surface Optimization – New Functionals Surface Optimization – New Functionals

Things get worse for MES

as we go to higher genus

Genus-5 MES

MVSyields nice toroidal arms

3 holes pinch off

S L O W !

Better surface representation?

VolutionVolution Surface of Genus 2 Surface of Genus 2

Suspended by 12 quarter circles on 6 cube faces

Architectural GeometryArchitectural Geometry

Volution blocks as modular wall elements

Architectural GeometryArchitectural Geometry

Möbius Bridge and Möbius House

Ongoing Research InterestOngoing Research Interest

CAD tools for Ideation, Informal Prototyping: Mimick the best of: clay, wire, paper, scotch-tape, styrofoam …

Without the adversity of: messy glue, gravity, strength limits …

Make available pseudo-physical materials that bend as nicely as steel wire, and stretch like a nylon hose, but are strong as titanium, and as transparent as quartz …