1. Input the two end points (xi, yi) and (xf, yf).

2. Check the value of m=|(yf – yi)/(xf – xi)|.

3. If m>1, then swap (xi, yi) and swap (xf, yf).

4. If xi>xf, then swap (xi, xf) and swap (yi, yf).

5. Calculate the constants Δx = xf –xi, Δy = yf –yi, 2Δy, (2Δy-2Δx) and obtain the starting value of decision parameter as po=2Δy-Δx.

6. If yi7. If m>1then plot (yk, xk) else plot (xk, yk).

8. Plot the first point, that is xo=xi and yo=yi.

9. At xk , starting k=0 , perform the following test

If pk < 0, then xk+1=xk+1, yk+1=yk, pk+1=pk+2Δy

Otherwise xk+1=xk+1, yk+1=yk + ys, pk+1=pk+2Δy-2Δx.

10. Repeat the step 9, Δx times.

2. Check the value of m=|(yf – yi)/(xf – xi)|.

3. If m>1, then swap (xi, yi) and swap (xf, yf).

4. If xi>xf, then swap (xi, xf) and swap (yi, yf).

5. Calculate the constants Δx = xf –xi, Δy = yf –yi, 2Δy, (2Δy-2Δx) and obtain the starting value of decision parameter as po=2Δy-Δx.

6. If yi

8. Plot the first point, that is xo=xi and yo=yi.

9. At xk , starting k=0 , perform the following test

If pk < 0, then xk+1=xk+1, yk+1=yk, pk+1=pk+2Δy

Otherwise xk+1=xk+1, yk+1=yk + ys, pk+1=pk+2Δy-2Δx.

10. Repeat the step 9, Δx times.

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