| 摘要 |
<p>PURPOSE:To simply and quickly secure the connection between straight lines by stopping the movement of a cursor if a drawing line crosses an existing drawn line or spot owing to the movement of a position input means and then drawing a straight line going over the crossing point with a prescribed operation of the position input means. CONSTITUTION:When a start point is inputted by a mouse 5, a line is drawn along a locus of a cursor which connects the start point and the cursor moved with operation of the mouse 5. An input interface 6 detects the moved variable of the mouse 5 and decides it to give this deciding result to a display control circuit 3. If the drawn line crosses an existing drawn line or spot, the movement of the cursor is stopped and a line is drawn between the start point and the crossing point to the existing drawn line or spot. Then the straight lines going over the drawn line are not drawn and no line gets out of the drawn line or spot. Then the movement of the cursor is granted after the mouse 5 carried out a prescribed out a prescribed operation, and a line going over the crossing point is drawn. Thus the connection is secured between the straight lines in a simple and quick operation.</p> |
