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Abstract

A technique of computing a realistic cross-section layout of a wire bundle which corresponds to the initial arrangement of wires. Geometrical data are obtained by a geometrical data obtaining means (11a), and the layout data corresponding to the geometrical data is obtained by layout data obtaining means (11b). Boundary data is calculated based on the layout data by boundary data calculation means (11c), and bundling shape data corresponding to the boundary data and showing the shape of the cross-section layout of the wire bundle is obtained by a bundling shape data obtaining means (11d). The boundary data is deformed toward the bundling shape data by a boundary data deformation means (11e), and the layout data are is adjusted to an arrangement of each cross-sectional shape by massing all of the plurality of cross-sectional shapes, which arrangement is by calculating each movement of the plurality of cross-sectional shapes in the boundary data according to a contact between boundary data and the cross-sectional shape, or a contact between each cross-sectional shape. The cross-section layout data based on the adjusted layout data is outputted by a cross-section layout data outputting means (11g).

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