Calculating Intermediate Points and Slope of a Line
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Questions and Answers

How is a horizontal line obtained?

  • By keeping the y-value constant and incrementing the x-value by one unit (correct)
  • By drawing arbitrary lines
  • By keeping the x-value constant and incrementing the y-value by one unit
  • By using the Digital Differential Analyzer (DDA) Algorithm

What is the purpose of the DDA algorithm?

  • To accumulate errors along a line segment
  • To draw lines on an image using only integer operations (correct)
  • To perform floating-point additions quickly
  • To calculate the incremental error in a line drawing algorithm

What is a key property of good line drawing algorithms?

  • Complexity
  • Color selection
  • Random termination
  • Constant density (correct)

How does the DDA algorithm determine which pixels to plot along a line segment?

<p>By calculating the difference between ideal and actual positions (B)</p> Signup and view all the answers

In line plotting, what does the Direct Method Algorithm use directly?

<p>Line equation (C)</p> Signup and view all the answers

What types of operations are involved in the DDA algorithm for line drawing?

<p>Integer addition, subtractions, and multiplication (A)</p> Signup and view all the answers

How is a vertical line obtained?

<p>By keeping the x-value constant and incrementing the y-value by one unit (C)</p> Signup and view all the answers

What does error accumulation refer to in the context of line drawing algorithms?

<p>The sum of all errors made during the drawing process (C)</p> Signup and view all the answers

Which algorithm directly uses the line equation in line plotting?

<p>Digital Differential Analyzer (DDA) Algorithm (D)</p> Signup and view all the answers

How is step_x calculated in the DDA algorithm?

<p>$\frac{\Delta x}{steps}$ (D)</p> Signup and view all the answers

What is a common feature of good line drawing algorithms?

<p>Rapid line drawing (C)</p> Signup and view all the answers

Why is the DDA algorithm considered efficient for drawing lines on an image?

<p>It utilizes rapid integer operations for quick line generation (C)</p> Signup and view all the answers

What is the key idea behind the DDA algorithm?

<p>Using incremental values of x and y to plot points along the line (A)</p> Signup and view all the answers

In the given context, what does DDA stand for?

<p>Digital Differential Analyzer (A)</p> Signup and view all the answers

What does the DDA algorithm ensure by incrementing either x or y at each step?

<p>It ensures the line is plotted smoothly between given endpoints (C)</p> Signup and view all the answers

What is the equation of the line given in the context?

<p>$y = 3x + b$ (D)</p> Signup and view all the answers

How are intermediate points calculated in the DDA algorithm?

<p>By determining incremental values of x and y at each step (D)</p> Signup and view all the answers

What is the main advantage of using the DDA algorithm for drawing lines?

<p>Faster than manual plotting without any algorithm (A)</p> Signup and view all the answers

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