| 摘要 |
PURPOSE:To reduce the calculated variable of a dragging processing and to visually easily execute a dragging operation by executing parallel move display on a slope based on the parallel moving amount of a local reference coordinate system on the slope. CONSTITUTION:A display control part 11 generates a slope SLS according to a request and plots it on a screen 13a. Further, the control part 11 specifies the dimension of a stereoscopic primitive SCP and a position P'O of the origin on the slope SLS according to a request. The control part 11 reads graphic data from a graphic data storage part 12 and plots the primitive SCP on the slope SLS. The control part 11 sets a stereoscopic primitive x-y-z on the screen 13a as the reference coordinate system so that the position PO can be the origin of the coordinate system, and the parallel moving amount of the primitive SCP on the slope SLS is calculated in this coordinate system x-y-z. Based on this moving amount, the control part 11 executes the parallel move display of the primitive SCP. |
