Total Number of Pages: 02
7th Semester Regular / Back Examination 2017-18
Time: 3 Hours
Max Marks: 70
Answer Question No.1 which is compulsory and any FIVE from the rest.
The figures in the right hand margin indicate marks.
Answer the following questions: Short answer type
What is a light pen? List some of its important applications.
Suppose a RGB raster system is to be designed using an 8 inch by 10 inch
screen with a resolution of 100 pixels per inch in each direction. If we want to
store 6 bits per pixel in the buffer, how much storage (in bytes) do we need for
the frame buffer?
What is fractal dimension? How is it calculated?
Consider the line from (5, 5) to (13, 9). Use the Bresenham’s algorithm to
rasterize the line.
Prove that 2-D rotation and scaling are commutative if scaling factors Sx = Sy
where n is any positive integer.
State the limitations of Cohen -Sutherland line clipping algorithm.
Write 3-D composite transformation matrix using homogenous coordinates to
scale a line AB with A(10, 15, 20) and B(45, 60, 30) by 3.5 in z-direction while
keeping point A fixed.
What is back face removal algorithm and why it is used?
Discuss the convex hull property of Bezier curves? How it is satisfied?
Find the transformation matrix for perspective projection by assuming view
plane normal to z-axis at z = d and center of projection at the origin.
(2 x 10)
Explain the components of a cathode ray tube with a neat labelled diagram for
electrostatic deflection cathode ray tube.
List the operating characteristics of the following I/O devices: Joystick
Find the pixel positions for the circle centered at (2, 0) with radius 15 using the
midpoint circle algorithm.
Use DDA algorithm to draw a line from A(8, 2) to B(3, 7) while determine the
pixel positions along the line and plotting those graphically that would
approximate the desired line.
Describe the steps needed to tilt a 2 x 2 square, located at position (4, 2) so
that its bottom edge is oriented parallel to (1, 2) vector. Provide the
transformation matrix and show how the matrix was derived.
Reflect the diamond shaped polygon whose vertices are A(-1, 0), B(0, -2),
C(1, 0) and D(0, 2) about the horizontal line y = 2 and about the vertical line x