PROBLEM TO BE SOLVED: To provide a technique for supporting intuitive and easy setting of an arbitrary display cross section in a three-dimensional space.SOLUTION: Among three orthogonal cross sections, while keeping a rotation angle of a display cross section on a positioning image of another cross section whose rotation angle has been received immediately before, the rotation angle around a normal axis of a prescribed cross section is received. When rotation is being performed in advance on the cross section different from the cross section whose rotation angle is received, a guide is rotated and displayed on a trajectory reflecting the rotation angle of the cross section whose rotation has been received immediately before according to the received rotation angle.COPYRIGHT: (C)2013,JPO&INPIT【課題】3次元空間において、直感的に容易に任意の表示断面を設定することを支援する技術を提供する。【解決手段】直交する3断面の中で、直前に回転角度を受け付けた他の断面の位置決め画像上の表示断面の回転角度を保持したまま、所定の断面の法線軸周りの回転角度を受け付ける。回転角度を受け付けた断面とは異なる断面で先に回転している場合、受け付けた回転角度に応じて、直前に回転を受け付けた断面の回転角度を反映した軌跡上で前記ガイドを回転させて表示する。【選択図】図7
