Patent ID: 6935997

Claim:
A method for providing a pattern for folded sheet structures comprising: (a) entering row and column data and an intersection point thereof into a computer program wherein the row data entered comprises a row cross section (RCS) based upon three dimensions comprising x, y and z dimensions and wherein vertices of the RCS are calculated for points XZ; wherein (XiZi) is a vertex of RCS, and Zi represent a distance the vertices is offset from a centerline; Lj−1 and Lj are line segments having two consecutive edges of CCS; Lj−1′ is an offset dependent on the sign of Zi; and Lj′ is an offset from line segment Lj; and ( y j ,z j )= L j−1 ′∩L j ′, (b) calculating a doubly-periodic folded (DPF) surface pattern from the data entered in step (a); (c) outputting the DPF surface pattern calculated in step (b) for folding a sheet structure according to said DPF surface pattern.