| 摘要 |
PURPOSE:To provide the three-dimensional pick processing system which is reduced in hardware cost and eliminates fruitlessness of processing by performing pick processing wherein a position on a display screen is specified to select a figure only by a geometrical conversion part. CONSTITUTION:When the position is specified and clicked in the pick processing by using an unshown mouse, etc., the geometrical conversion part 2a converts the coordinates of input figure data, and then clips figure data in a pick frame and compares the Z value (depth-directional coordinate value of figure) of the figure on condition that the figure is in the clip frame, thereby recognizing the pick figure. The recognized pick figure is supplied to an unshown processing part, which processes the picked figure. The geometrical conversion part 2a performs the pick processing, so processing for picking is required at neither a rendering part 2b nor a drawing hardware part 3 unlike before to reduce the cost of the hardware and eliminate fruitlessness of processing. |
