Centre for Development of Advanced Computing(C-DAC) 2005 M.C.A Computer Graphics - Question Paper

End-Term exam
Paper Code: MCA-108 Subject: Computer Graphics
Second Semester [MCA] – MAY 2005
Time: three Hours Maximum Marks: 60

Q. one (a) What is scan conversion? 1
(b) What do you mean by persistence? 1
(c) What is aspect ratio? How do we compute it? 1½
(d) elaborate 2 difference methods for producing color display with CRT? 1
(e) What do you mean by homogeneous co-ordinate? provide example. 1½
(f) provide difference ranging from parametric continuity and geometric continuity. 1½
(g) describe vanishing points. 1½
(h) Enumerate different kinds of parallel projections. 2
(i) What do you mean by centre of projection. 1
(j)Write the generalized Euler’s formula and verify it for 2
(k) provide an example of CSG. 2
(l) Write rotation matrices for rotation in 3D about the coordinate axis. 3
(m) Why do we use parametric representation of curves? 1
Q. two define the rotation of an object about an axis A, which is not parallel to any of
the 3 co-ordinate axis of the co-ordinate system. 10
Paper Code: MCA-108 Subject: Computer Graphics
Note: Q. one is compulsory. Attempt 1 ques. from every unit.
UNIT – II
Q. four (a) Derive the basics matrix for cubic Bezier curve. provide also the corresponding
Bernstein Polynomials. 8
(b) elaborate conditions for smoothly joining the 2 Bezier curve segment. 2
Q. five (a) What do you mean by knot (values) in B-splines. describe the different kinds of
knot vectors and provide the effect of such knot vectors on the shape of the curve. 6
(b) define a method of scan conversion of a curve. 4
UNIT – III
Q. six (a) What do you mean by parallel projection and perspective projection? 2
(b) Drive a matrix for the projection of a point p(x, y, z) onto a projection plane at
a distance ZP from the origin and perpendicular to z-axis. 8
Q. seven (a) elaborate the different ways of representing solids? define briefly the
properties of solid representation scheme. 6
(b) define 1 hierarchical representation scheme. 4
UNIT – IV
Q. eight (a) define specular reflection model and the calculation of reflection vector.
2½
(b) elaborate difference(s) ranging from Grourad and Phonge shading. 2½
(c) Write the pseudocode for z-buffer algorithm. 5
Q. nine define the steps of Depth-sort algorithm. 10

Earning:   Approval pending.