| 摘要 |
PURPOSE:To paint out a graphic by an easy method without changing the contour of the graphic by superposing contour data on the graphic and change-point data on the contour of the graphic one over the other and switching the painting-out operation with the data. CONSTITUTION:The coordinate X and Y of a change point of the contour of the graphic area recorded in a point data memory 2 and read out by a CPU 1, and '1' is recorded as a Bit1 in an address corresponding to the coordinates X and Y of a drawing table memory 3. Then next coordinates X and Y of the memory 2 are read, '1' is recorded as a Bit1 in an address corresponding to those coordinates of the memory 3, and '1' is recorded as a Bit2 of the memory 3 for straight line data connecting said coordinates X and Y. This operation is repeated to record straight line data connecting change points of the graphic in the memory 3. Then a drawing status memory 7 is switched only by line parts according to said data to easily paint out the graphic without changing the contour of the graphic. |
