THREE-DIMENSIONAL PROJECTING METHOD, AND THREE-DIMENSIONAL PATTERN DISPLAY DEVICE

摘要

An inverse conical plane (RC) having a center line of rotation on a vertical line passing through an origin (O) is set with a virtual projecting area (PA), on which a sector display object area (OA) is projected. A view point (V) is offset from a reference position (QC) on the vertical line, and is so arcuately moved that the line of sight at the time when the display object area (OA) is viewed from the view point (V) through the projecting area (PA) may pass through that vertical line. As a result, the azimuth and distance of a target on a three-dimensional display image can be easily grasped to display a highly visible display containing the vicinity of a viewing ship and to reduce the computational complexity for the projections.