Difference between DDA and Bresenham’s Algorithm

Do you know the difference between DDA and Bresenham’s Algorithm? Many people don’t, but they are actually quite different. In this blog post, we will explore the differences between these two algorithms and see which one is better for certain situations. Stay tuned!

Contents

What is DDA?

DDA drawing is a computer graphics algorithm used for drawing lines on a raster display. It is one of the oldest and most commonly used line-drawing algorithms. The algorithm works by calculating the slope of the line and incrementing an x or y value depending on the slope’s sign. The DDA algorithm is relatively simple and easy to implement, making it a popular choice for graphics applications. However, it is also susceptible to rounding errors, which can lead to visible artifacts on the screen. Nonetheless, the DDA algorithm remains a widely used approach for drawing lines on a raster display.

What is Bresenham’s Algorithm?

Bresenham’s Algorithm is a line drawing algorithm that determines the points of an n-dimensional raster that should be selected in order to form a close approximation to a straight line between two points.

• It is commonly used in computer graphics and CAD applications. The algorithm is named after Jack Bresenham, who developed it while working on the PLATO IV display system at the University of Illinois.
• Bresenham’s Algorithm is an example of incremental construction, as it starts with the endpoints of the line and successively adds new points, one at a time, based on these endpoints.
• Given the start and end coordinates of a line, Bresenham’s Algorithm can be used to calculate all of the intermediate points along the line. This makes it especially useful for drawing lines on a raster display, as it can be used to produce smoother lines than direct use of equation-based line drawing algorithms. In addition, Bresenham’s Algorithm is relatively easy to implement, making it a popular choice for many applications.

Difference between DDA and Bresenham’s Algorithm

DDA and Bresenham’s Algorithm are both methods of computer graphics. DDA is the traditional method, while Bresenham’s is a more efficient, incremental approach. DDA works by calculating the slope of a line and then incrementally drawing pixels along that line. However, this can result in inaccuracies, especially on diagonal lines. Bresenham’s Algorithm avoids this problem by using integer arithmetic to calculate which pixels should be drawn. As a result, it is more efficient and leads to more accurate results.

Conclusion

While both of these algorithms are used for drawing lines, they each have their own benefits and drawbacks. The DDA algorithm is better suited for curves and circles, while Bresenham’s algorithm is more accurate when it comes to straight lines.