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 . ...