Digital differential analyzer (graphics algorithm): Difference between revisions

Revision as of 16:51, 14 August 2007

Revision as of 16:53, 14 August 2007

Line 1:

DDA (digital differential analyzer) is used for generating pixels using a line formed by two points. It employees the equation for line representation (example: y=mx+c), then scan through an axis. Each scan it would determine the value on the other axis using the equation, this way the proper pixel can be located.

Here is a sample C code of the DDA implementation:

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

Line 20 ⟶ 19:

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

}

}