Computer Graphics Laboratory Notes
Subject Overview
The practical companion to Computer Graphics, implementing pixel plotting, 2D shape drawing, text formatting, line-drawing algorithms (DDA, Bresenham's), circle and ellipse generation, 2D transformations, and polygon filling and clipping algorithms. A 2-credit core lab paper.
Subject at a glance
1
Units
14
Topics
2
Credits
1
Infographics
Unit-wise Syllabus
1 units — open any unit for detailed topic-wise notes, diagrams and important exam questions
- Pixel plotting
- simple 2D shape drawing (lines, circles)
- text formatting with graphics functions
- DDA line-drawing algorithm
- Bresenham's line algorithm comparison
- moving wheel via midpoint circle and DDA algorithms
- ellipse generation via midpoint algorithm
- 2D transformations (translation, rotation, scaling) on user input
- triangle rotation
- combined scaling and translation operations
- boundary fill algorithm
- scan-line polygon fill algorithm
- line clipping algorithms
- Sutherland-Hodgeman polygon clipping
- 1
Start at (0, r)
- 2
Decision p = 1 − r
- 3
If p < 0
Next (x + 1, y); p += 2x + 3
- 4
Else
Next (x + 1, y − 1); p += 2(x − y) + 5
- 5
Plot all 8 symmetric points
- 6
Repeat while x < y
Study guide
In this lab you plot pixels, draw lines and circles, format text, implement DDA and Bresenham's lines, animate a wheel with midpoint circle and DDA, generate ellipses, apply 2D translation, rotation and scaling, rotate triangles, implement boundary fill and scan-line polygon fill and line clipping. Compare algorithm outputs visually.
Why Computer Graphics Laboratory Matters
Implementing graphics algorithms yourself gives a real feel for how images are drawn.
How to Prepare for Computer Graphics Laboratory
- Implement each algorithm without library shortcuts first.
- Save screenshots of outputs.
- Compare DDA and Bresenham results.
Computer Graphics Laboratory: Frequently Asked Questions
What is done in the graphics lab?
Implementation of line, circle and ellipse algorithms, 2D transformations, filling and clipping.