About this previous year paper
Course: B.Tech (Semester V) Subject Code: KCS-053
Subject Name: Computer Graphics Time: 3 Hours
Total Marks: 100 Note: Attempt all sections.
Section A – Short Answer Questions (2 × 10 = 20 Marks)
Answer all briefly: Components of computer graphics
Aliasing and anti-aliasing Curve clipping and text clipping
Importance of homogeneous coordinates in transformations
Meaning of transformation in computer graphics 3D geometric primitives
Important terms used in projection
Difference between interpolation and approximation spline Quadratic surfaces and explanation of a sphere
Types of coherence
Section B – Descriptive Questions (10 × 3 = 30 Marks)
Attempt any three:
Difference between Bresenham’s and DDA line drawing algorithms
Cohen–Sutherland line clipping algorithm and its limitations
3D clipping and problems encountered in perspective projections
Gouraud shading vs Phong shading – advantages and disadvantages
Hidden surface detection and explanation of Depth (Z) Buffer algorithm
Section C – Long Answer Questions (10 × 5 = 50 Marks)
Question 3
(a) Explain Shadow Mask CRT, its advantages and disadvantages
or
(b) Find the mirror reflection of triangle A(0,3), B(2,0), C(3,2) about the line passing through (1,3) and (–1,–1).
Question 4
(a) Describe Weiler–Atherton Polygon Clipping Algorithm with example
or
(b) Use Sutherland–Cohen Algorithm to find visible portion of line P(40,80)–Q(120,30) for clipping window A(20,20), B(60,20), C(60,40), D(20,40).
Question 5
(a) Define Projection. Differentiate between Parallel and Perspective Projection with diagrams.
or
(b) Explain 3D clipping and issues in Perspective Projection.
Question 6
(a) Explain B-Spline Curves and their properties.
or
(b) Role of Bezier Curves in designing surfaces and their properties.
Question 7
(a) Describe Back-Face Removal Algorithm and its limitations.
or
(b) Explain Phong Illumination Model.