| 摘要 |
PURPOSE:To provide a three-dimensional CAD system remarkably improving the utilization efficiency by discriminating a polygonal surface model from a wire frame model at its display. CONSTITUTION:The surface data is read from a surface data storage section 4, wire frame data is read from a wire frame data storage section 5, and attribute data designating the display method is read from a display attribute storage section 1. A marker display apex decision section 6 decides the apex of the surface to which the triangular marker is supplied at the surface display. A marker length calculation section 7 calculates the marker length for adjustment. A marker is given to one apex of the surface, discriminating the polygonal surface model and the wire frame model so as to be displayed on a display 10 from a data display section 8. |
