Rotation angle calculating method of wire harness, rotation angle calculating apparatus, and computer-readable recording medium

A rotation angle calculating apparatus for calculating a rotation angle of the wire harness at an arbitrary measuring point of the wire harness when the wire harness is deformed from a first shape to a second shape while a fixed point of the wire harness is fixed, the rotation angle calculating apparatus, comprising:

• a node setting unit, which sets a plurality of intermediate points between the fixed point and the measuring point of the wire harness in the second shape, wherein the fixed point, the measuring point and the intermediate points are set as nodes respectively;
• a node vector setting unit, which sets vectors at the nodes of the wire harness in the second shape as node vectors respectively;
• an angles calculating unit, which calculates angles, each of which has a rotation direction, wherein each of the angles is defined between the vectors at the adjoining nodes;
• and
• an angles adding unit, which adds the angles to each other so as to calculate a rotation angle having a rotation direction at the measuring point.