Drawing of the Successive Highway Perspectives by Microcomputer

This report describes a technique drawing the successive highway perspectives on the graphic display by using the microcomputer. The eye of driver is considered as the point of sight. Therefore, the perspectives drawn on the display are what can be looked from the position of driver. If the running speed and appropriate time interval are given, the perspectives are replaced in turn by the next ones at the point of sight advanced during the time interval. The coordinates of the highway are computed under the given conditions of horizontal and vertical alignment. The hidden lines are not drawn on the display. About 1.5 seconds are required to draw one perspective, that is, the displays are changed every 1.5 seconds. We can feel by watching these displays as if we are actually driving on the highway even before construction.