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Gujarat Technological UniversitySummer 2026 Examination

GTU 3150712 Computer Graphics Summer 2026 Paper Solution & PDF

B.E. · Computer Engineering · Semester 5 · Subject Code: 3150712
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours2:30 PM – 5:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)
List any three major applications of computer graphics.
3 Marks
(b)

Explain the difference between Vector (Random Scan) and Raster Scan display systems.

4 Marks
(c)
Explain the working of CRT (Cathode Ray Tube) with a suitable diagram.
7 Marks

Question 2

14 MarksMedium
(a)

Write DDA line drawing algorithm. Also state the limitations of DDA line drawing algorithm.

3 Marks
(b)
Explain odd-even, winding number and inside-outside test for polygon filling.
4 Marks
(c)

Apply Mid-Point Circle Algorithm to find the coordinates of a circle with radius r=10 and center (0,0) for a single octant.

7 Marks
OR OPTION
(c)

Given end-point P1(1,3) and P2(8,9) find the pixels illuminated using Bresenham Line Drawing algorithm.

7 Marks

Question 3

14 MarksMedium
(a)
What is the difference between Window and ViewPort?
3 Marks
(b)

What is a need of homogeneous co-ordinates? Give homogeneous co-ordinates for translation, rotation and scaling.

4 Marks
(c)

Consider a triangle with vertices A(1,1), B(3,2) and C(2,4). Find out the transformation matrix which rotates given triangle about point A(1,1) by an angle 45∘ clockwise.

7 Marks
OR OPTION
(a)
List and Explain various 2D transformation.
3 Marks
(b)
Explain reflection and shear with example.
4 Marks
(c)
Explain the Cohen - Sutherland line clipping algorithm in details.
7 Marks

Question 4

14 MarksMedium
(a)
Discuss various ways to represent a polygon mesh in brief.
3 Marks
(b)
Write a short note on 3D rotation.
4 Marks
(c)
List and explain the properties of Bezier curves.
7 Marks
OR OPTION
(a)
Write a short note on 3D translation.
3 Marks
(b)
Compare between interpolation spline and approximate spline.
4 Marks
(c)
List and explain the properties of B-spline curves.
7 Marks

Question 5

14 MarksMedium
(a)
Differentiate: Parallel projection vs. Perspective projection.
3 Marks
(b)
Explain 3D Scaling with example.
4 Marks
(c)
Explain Depth-Buffer method (Z-Buffer) for visible surface detection.
7 Marks
OR OPTION
(a)
Explain ambient light in brief.
3 Marks
(b)
Compare parallel and perspective projection.
4 Marks
(c)
Explain how RGB to CMY color models with proper diagram.
7 Marks
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About this Examination Paper & Attribution

Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Computer Graphics (Summer 2026, B.E. · Computer Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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