x0 y0 xk yk dx=xk-x dy=yk-y dd=2*(dy-dx)
( 2 , 3 ) ( 8 , 5 ) dp=2*dy d0=2*dy-dx
P0=(2,3)
i=0:
dx=6, dy=2, dp=4, dd=-8, d0=-2
x1 =3, d<0 → d=-2+4=2, y1 =3 => P1=(3,3)
i=1: x2=4, d>0 → d=2-8=-6, y2=3+1=4 => P2=(4,4)
i=2:
x3=5, d<0 → d=-6+4=-2, y3=4 => P3=(5,4)
i=3:
x4=6, d<0 → d=-2+4=2, y4=4 => P4=(6,4)
i=4:
x5=7, d>0 → d=2-8=-6, y5=4+1=5 => P5=(7,5)
i=5:
x6=8, d<0 → d=-6+4=-2, y6=5 => P6=(8,5)
Dragonn