| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-speed plotting method by which a calculation am ount in plotting is reduced. SOLUTION: A fixed distance L is set in a visual line direction from an observing point 1, a virtual projecting surface P is provided on L and orthogonally crossed with the visual line direction and an object to be displayed 2 which is located to be farther than L is projected on the virtual projecting surface P on L as a two-dimensional image and plotted. Together with it, an object to be displayed 3 located between the observing point 1 and L is plotted between the observing point 1 and the virtual projecting surface P as a three- dimensional image by calculating the position whenever a fixed time interval or the object to be displayed is changed. |
