| 摘要 |
PURPOSE:To reduce data processing volume and to rapidly detect an intersecting point by comparing picture elements in graphic data read out from a data base with three-dimensional coordinates and detecting an intersecting part between both the graphics. CONSTITUTION:A host computer 3 reads out graphic data 1, 2 from the data base 9 and sends them to a graphic processing processor 4. The processor 4 processes the graphic data 1, 2 by Z-buffer method by means of a Z-buffer 6 to form display data and sends the display data to a frame buffer memory 5. A display device 8 displays the graphic of an object so as to erase a recessed face three-dimensionally. On the other hand, the processor 4 finds out an intersecting part between the parts of the object from the graphic data 1, 2 and sends the obtained intersecting part data to the Z-buffer memory 6. Thus, the data processing volume can be reduced and the intersecting point can be rapidly detected.
|
