Note on DDA Algorithm:

DDA (Digital Differential Analyzer) is a fundamental algorithm used in computer graphics to draw lines between two specified points. Here's a quick summary:

• Functionality: Calculates the intermediate points between two endpoints to create a smooth line segment on a raster display.
• Method: Employs an incremental approach, iteratively calculating the next point based on the previous ones and the slope of the line.
• Advantages:
  • Simple and efficient, making it suitable for real-time applications.
  • Easy to implement due to minimal calculations involving only additions.
• Disadvantages:
  • Prone to aliasing (staircase effect) due to round-off errors during calculations.
  • May not handle special cases like vertical lines efficiently in integer implementations.
  • Requires floating-point arithmetic for accurate results, which can be slower on some systems.

Overall: DDA is a beginner-friendly algorithm for line drawing due to its simplicity and efficiency. However, for high-precision graphics or specific use cases, alternative algorithms like Bresenham's line algorithm might be preferred.

he DDA algorithm uses two main formulas:

1. The actual slope of the line is calculated as:
   m = (Y2 - Y1) / (X2 - X1)
   

2. X_increment = 1 / m
   

3. By having Y_increment = 1 
Therefore, even though the original formulas didn't explicitly show the slope, it plays a crucial role in determining the step size in the Y-coordinate and ultimately shaping the line based on its angle.
4. always, the DDA algorithm iterates through X-coordinates at a constant pace (one unit per step). However, the corresponding change in Y-coordinates is determined by the slope (m) through the X-increment formula. So, steeper lines (higher absolute values of m) will have larger Y-coordinate changes per X-step, and vice versa.

Where:

• X1 and Y1 are the coordinates of the starting point.
• X2 and Y2 are the coordinates of the ending point.

These formulas calculate the change in X and Y coordinates per step, allowing the algorithm to iteratively determine subsequent points on the line until it reaches the endpoint.