PDE based shape modelling and manipulation of complex geometry Hassan Ugail School of Informatics University of Bradford, United Kingdom
PDE based shape modelling and manipulation of complex geometry
Hassan Ugail School of Informatics University of Bradford, United Kingdom
NURBS: Commonly used in 3D modelling
Time consuming and not so intuitive
Method based on boundaries or character lines
© H.Ugail, University of Bradford
© H.Ugail, University of Bradford
u=0
p1
p2
P2
Interactive Definition of Shape Interactive Definition of Shape
Demo
© H.Ugail, University of Bradford
u=0
d2
Examples of PDE Geometry Examples of PDE Geometry
P2
© H.Ugail, University of Bradford
u=0
d2
PDE Geometry Manipulations PDE Geometry Manipulations
P2
© H.Ugail, University of Bradford
Geometry manipulation using the spineGeometry manipulation using the spine
© H.Ugail, University of Bradford
composite surface Corresponding spine described
PDE aircraft geometry Boundary curves and spine
ExamplesExamples
© H.Ugail, University of Bradford
© H.Ugail, University of Bradford
Examples …Examples …
© H.Ugail, University of Bradford
Examples …Examples …
Connection with splines
© H.Ugail, University of Bradford
Presently trying to understand the connections between Bezier surfaces and PDEs. (in collaboration with Prof. Monterde from University of Valencia, Spain).
Theorem:Theorem: Given a Bihamonic Bezier Surface of degree n then the inner control points are completely determined by the boundary control points. (Monterde & Ugail, Computer Aided Geometric Design, To Appear)
Some Relevant Literature
© H.Ugail, University of Bradford
Publications
Ugail H, Bloor M I and Wilson M J (1999): "Techniques for Interactive Design Using the PDE Method“, ACM Transactions on Graphics, 18 (2): 195-212.
Ugail H (2004): "Spine Based Shape Parameterisaion for PDE Surfaces" Journal of Computing, 72, 195-206.
Monterde L, Ugail H (2004), “On Harmonic and Bi-harmonic Bezier Surfaces, Computer Aided Geometric Design”, To Appear.
Patent: Patent:
““Method for Complex Geometry Re-Modelling”, British patent (no. Method for Complex Geometry Re-Modelling”, British patent (no. GB 0410096.2) has recently been filed.GB 0410096.2) has recently been filed.