Software Lab-XI (Computer Graphics) Notes
Subject Overview
The practical companion to Computer Graphics, implementing graphics primitives, line/
Subject at a glance
1
Units
7
Topics
2
Credits
1
Infographics
Unit-wise Syllabus
1 units — open any unit for detailed topic-wise notes, diagrams and important exam questions
- Basic C++ graphics functions (circle, putpixel, rectangle, arc, ellipse, floodfill, setcolor)
- primitive functions for animation
- direct method/DDA/Bresenham's line drawing algorithms
- circle drawing via polynomial/trigonometric/Bresenham's methods
- ellipse drawing via Bresenham's algorithm
- moving a character along a circle
- 2D clipping and windowing
- 1Plot the start point (x0, y0)
- 2Compute dx, dy and p = 2dy − dx
- 3If p < 0
Next is (x + 1, y); p += 2dy
- 4Else
Next is (x + 1, y + 1); p += 2dy − 2dx
- 5Repeat until x reaches x1
Study guide
In this lab you use C++ graphics functions (circle, putpixel, rectangle, arc, ellipse, floodfill, setcolor), basic animation, the direct, DDA and Bresenham line algorithms, circle drawing by polynomial, trigonometric and Bresenham methods, Bresenham's ellipse, moving a character along a circle and 2D clipping and windowing. Compare the DDA and Bresenham outputs on the same line.
Why Software Lab-XI (Computer Graphics) Matters
Implementing the algorithms yourself gives a real understanding of how images are drawn on screen.
How to Prepare for Software Lab-XI (Computer Graphics)
- Write each algorithm without library helpers first.
- Run and compare algorithms on the same inputs.
- Keep screenshots of each output for the record.
Software Lab-XI (Computer Graphics): Frequently Asked Questions
What is done in the graphics lab?
Line, circle and ellipse algorithms, animation basics and 2D clipping using C++ graphics.