Title:
COMPUTER GRAPHICS ANIMATION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO2000002164
Kind Code:
A3
Abstract:
An implicit surface is defined by a time dependent implicit surface model. From the implicit surface model a first and second mesh of control points of a first and second non-linear coordinate valued functions such as second degree Bezier functions are computed respectively. The first and second non-linear coordinate valued functions represent approximations of the implicit surface at a first and second point in time respectively. The points of the first mesh are used as a starting point for computing an approximation of the second mesh of points. The surfaces defined by the first and second non-linear coordinate valued functions respectively are rendered for example by approximating each by a respective mesh of flat tiangles.
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Inventors:
BRUIJNS JOHANNES
VAN OVERVELD CORNELIS W A M
VAN OVERVELD CORNELIS W A M
Application Number:
PCT/IB1999/001137
Publication Date:
April 06, 2000
Filing Date:
June 17, 1999
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
PHILIPS SVENSKA AB (SE)
PHILIPS SVENSKA AB (SE)
International Classes:
G06T13/20; G06T17/00; G06T17/30; (IPC1-7): G06T15/70
Other References:
M. DESBRUN et al., "Proceedings Graphics Interface"98, 18-20 June 1998, Vancouver, BC, "Active Implicit Surface for Animation", 1998, Canadian Human-Computer, pages 143-150.
M.-P. CANI-GASCUEL ET AL.: "Animation of Deformable Models Using Implicit Surfaces", IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS, vol. 3, no. 1, 1997, pages 39 - 50
C.L. BAJAJ ET AL.: "Spline Approximations of Real Algebraic Surfaces", J. SYMBOLIC COMPUTATION, vol. 23, 1997, pages 315 - 333
B. WYVILL ET AL.: "Field functions for implicit surfaces", THE VISUAL COMPUTER, vol. 5, 1989, pages 75 - 82
M.-P. CANI-GASCUEL ET AL.: "Animation of Deformable Models Using Implicit Surfaces", IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS, vol. 3, no. 1, 1997, pages 39 - 50
C.L. BAJAJ ET AL.: "Spline Approximations of Real Algebraic Surfaces", J. SYMBOLIC COMPUTATION, vol. 23, 1997, pages 315 - 333
B. WYVILL ET AL.: "Field functions for implicit surfaces", THE VISUAL COMPUTER, vol. 5, 1989, pages 75 - 82
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