| 摘要 |
PURPOSE:To easily plot a perspective diagram on a computer even if a three- dimensional model is not generated on the computer or information inputted by means of a manual operation is not inputted by means of a scanner. CONSTITUTION:A focus 1 is stored in a position shown by F1 on a virtual plane by selecting the focus 1 in a command menu 6, displaying a focus coordinate input window and inputting a numerical value from a keyboard. An auxiliary line 1 in the command menu 6 is selected, a linear line connecting F1 and a cursor C is displayed and the left key of a mouse 4 is inputted. Thus, an auxiliary line L11 is fixed. |
