Georges-Pierre Bonneau

Georges-Pierre.Bonneau at inria.fr
snail mail:
INRIA Rhône-Alpes
655 Av. de l'Europe
F-38330 Saint-Ismier (France)
(+33) 476-615-406 (Voice)
(+33) 476-615-440 (Fax)
Professor at Grenoble Universités.
Research at Lab. LJK and INRIA in the MAVERICK group

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MoSiG, Computer Graphics II
Geometric Modeling


Tuesday, November 7, 2017
Send email with archive containing pdf report and program sources
Email object: [MOSIG] CGII

Implement basic curve subdivision schemes
Illustrate their convergence

Download starting source code: MOSIG_CGII_FOR_STUDENTS

A Subdivision Curve


Its Curvature Plot: the curve is NOT C2

Curvature Plot


1) Implement for an arbitrary closed polygon the following curve subdivision scheme:

a. Chaikin
b. Corner cutting (with parameters a and b)
c. 4-point scheme
d. Generalized 4-point scheme
e. Uniform splines of degree 3

2) Compute a distance between a given polygon and its subdivision

3) Compute the angles at each vertices of a closed polygon

4) Write a short report (max 4 to 5 pages including illustrations), with illustration of the implemented subdivision schemes, together with plots showing the convergence of the scheme and the smoothness (C0, C1 or C2) of the limit