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Three dimensional graphics processing apparatus, image display apparatus, three dimensional graphics processing method, control program and computer-readable recording medium
Three dimensional graphics processing apparatus, image display apparatus, three dimensional graphics processing method, control program and computer-readable recording medium
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机译:三维图形处理设备,图像显示设备,三维图形处理方法,控制程序和计算机可读记录介质
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摘要
The present invention provides a three dimensional graphics processing apparatus for performing an anti-aliasing processing in an sufficient manner, without using the conventional area DDA, by using a line buffer as an area for storing display image data to reduce the required memory area, while the increase of the calculation time is restricted by performing calculation suitable for the polygon edge without degrading the precision of the calculation. In the three dimensional graphics processing apparatus, the coordinates of the intersection points between the polygon edge and the scanning lines are calculated from information on the starting vertex and the ending vertex of the polygon edge and information on the scanning lines. The calculation method is changed in accordance with the characteristics of the polygon edge. Further, a blending coefficient for the anti-aliasing process is obtained by calculating an area ratio of an internal region of the polygon occupied within a pixel.
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