Digital differential analyzer (graphics algorithm): Difference between revisions

Revision as of 17:04, 14 August 2007

Revision as of 17:07, 14 August 2007

Line 6:

== Sample Code ==

{{Citation}}

void line DDA(int xa, int ya, int xb, int yb)

{

int dx=xb-xa, dy=yb-ya, steps, k;

float xIncrement, yIncrement, x=xa, y=ya;

int dx=xb-xa, dy=yb-ya, steps, k;

if(abs(dx)>abs(dy)) steps=abs(dx);

else steps=abs(dy);

float xIncrement, yIncrement, x=xa, y=ya;

xIncrement=dx/(float)steps;

yIncrement=dy/(float)steps;

if(abs(dx)>abs(dy)) steps=abs(dx);

setPixel(ROUND(x), ROUND(y));

for(k=0; k<steps; k++)

else steps=abs(dy);

{

x += xIncrement;

y += yIncrement;

setPixel(ROUND(x), ROUND(y));

xIncrement=dx/(float)steps;

}

yIncrement=dy/(float)steps;

setPixel(ROUND(x), ROUND(y));

for(k=0; k<steps; k++)

{

x += xIncrement;

y += yIncrement;

setPixel(ROUND(x), ROUND(y));

}

}