dda line algorithm easily create in c using opengl|opengl bangla tutorials

dda line  algorithm easily create in c using opengl|opengl bangla tutorials .

I try  to show how to easily draw digital differential analyzer line drawing algorithm using opengl c programming.DDA line drawing algorithm is the importent part  in computer graphics .I just wanted to explain the source code how it is  work easily .

Formula of DDA line drawing algorithm:

Step : 1

If the slope is less than or equal to 1, the unit x intervals Dx =1 and compute each successive y values.

Dx =1

m= Dy / Dx

        m = ( y2 – y1 ) / 1

m = (yk+1 – yk)/ 1 

       yk+1 = yk + m

Step : 2

If the slope is greater than 1, the roles of x any y at the unit y intervals Dy =1  and compute each successive x values.

   

Dy =1

m= Dy / Dx 

m = 1 / (x2 – x1 )

m = 1 / (xk+1 – xk)

 xk+1 = xk + (1/m)

Step : 3

If the processing is reversed, the starting point at the right .

Dx =-1

m= Dy / Dx

m = ( y2 – y1 ) / -1

yk+1 = yk - m   

Step : 4

 Dy =-1

m= Dy / Dx 

m = -1 / (x2 – x1 )

m = -1 / (xk+1 – xk)

xk+1 = xk – (1/m)

 I believe that if anyone sees this video from the first to the end, he/her can understand how to draw dda line algorithm.I hope you guys  this video are so helpful to draw digital differential analyzer line drawing algorithm.

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