Code Forums - View Single Post - How to convert the decartes ordinate to screen ordinate ?

john_tran · 10-21-2004, 07:32 PM

i use BRESENHAM or DDA Algorithm drawing a line, i can't draw with a negative ordinate. How to convert from the decartes ordinate to screen ordinate?
Such as :
draw a line from (2,3) to (-5,8).
Thanks

10-21-2004, 07:32 PM	#1 (permalink)
john_tran Registered User Join Date: Oct 2004 Posts: 22	How to convert the decartes ordinate to screen ordinate ? i use BRESENHAM or DDA Algorithm drawing a line, i can't draw with a negative ordinate. How to convert from the decartes ordinate to screen ordinate? Such as : draw a line from (2,3) to (-5,8). Thanks