In this algorithm to draw a line the difference in the pixel points is analysed then according to that the line is drawn. The method is said to be incremental because it performs computations at each step and uses the outcome of the previous step. Before understanding DDA algorithm, we must understand what is a line and how it is defined? When two points in a plane connected by a line segment and falls under the line equation is known as a line. However, it uses the floating point addition which makes it faster than the straight implementation of the line equation. The algorithm is not precise because of the usage of floating point representation could cause computed points to drift away from their actual position when the line is relatively long.

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It is a basic element in graphics. To draw a line, you need two points between which you can draw a line. Bresenham in and it is much accurate and much more efficient than DDA. It scans the coordinates but instead of rounding them off it takes the incremental value in account by adding or subtracting and therefore can be used for drawing circle and curves.

Comparision DDA uses floating points where as Bresenham algorithm use fixed points. DDA round off the coordinates to nearest integer but Bresenham algorithm does not. Bresenham algorithm is much accurate and efficient than DDA. Bresenham algorithm can draw circles and curves with much more accuracy than DDA.

Real Arithmetic Bresenhams algorithm uses fixed points i. Operations DDA algorithms uses multiplication and division in its operations. Bresenhams algorithm uses only subtraction and addition in its Speed DDA algorithm is rather slowly than Bresenhams algorithm in line drawing because it uses real arithmetic floating point operations.

Bresenhams algorithm is faster than DDA algorithm in line drawing because it performs only addition and subtraction in its calculations and uses only integer arithmetic so it runs significantly faster.

Bresenhm algorithm is more accurate and efficient as than DDA algorithm. Drawing DDA algorithm can draw circles and curves but that are not as accurate as Bresenhm algorithm. Bresenhm algorithm can draw circles and curves with much more accuracy than DDA algorithm.

Round off DDA algorithm round off the coordinates to integer that is nearest to the line. Bresenhm algorithm does not round off but takes the incremental value in its operation.

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## Difference Between DDA and Bresenhamâ€™s Line Algorithm

It is a basic element in graphics. To draw a line, you need two points between which you can draw a line. Bresenham in and it is much accurate and much more efficient than DDA. It scans the coordinates but instead of rounding them off it takes the incremental value in account by adding or subtracting and therefore can be used for drawing circle and curves.

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## Comparions between DDA and Bresenham Line Drawing algorithm

Previously, we were using analytical analyzers to compute the pixels and thereby line drawings were made possible. But these analytical methods are not as accurate as the digital methods that with the usage of these digital algorithms now and as with every field, we have been inventing higher quality methods in computer graphics as well. The invention of these algorithms is a perfect example. Before we proceed, let us look at the concept behind these algorithms.