System for growing two-dimensional and three-dimensional...

Details System for growing two-dimensional and three-dimensional... System for growing two-dimensional and three-dimensional...

G - Physics

06

T

G06T 17/20 (2006.01) G06F 15/60 (1990.01)

Patent

CA 2094223

68432-148 ABSTRACT This invention relates to computer-assisted design (CAD) systems and specifically relates to a system and method for generating two-dimensional and three-dimensional surface meshes and for unwrapping and flattening three-dimensional surfaces into two-dimensional pattern shapes. The present invention has specific application to the footwear, furniture, automotive, aerospace and medical industries. The invention provides a method for developing a two-dimensional shape that approximates a three-dimensional surface region mapped to a flat plane using a computer-assisted design system. The surface region is defined by a plurality of parametric spline patch surfaces joined together at surface boundaries and having at least one edge defining a discontinuity in said surface region and at least one vertex defining a point on said edge. The method includes the steps of: growing a regional mesh on said three-dimensional surface region conforming to the topology of the surface region independent of said surface boundaries, wherein said mesh coincides with and spans the mathematic definition of the corresponding surfaces, said mesh including nodal points interconnected by links defining polygonal elements between said links; and mapping said polygonal elements to a flat plane and assembling said polygonal elements in a two-dimensional shape.

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