Q1. For the given points A, B, C, D and E write the OpenGL commands to sketch the polygon connecting AB, BC, CD and DE.
Q2. Find out the transformation matrix to represent 60o clockwise rotation of points A(a,b) and point K(c,d) around the point C(e,f).
Q3. One set of control points P, Q, R, S are given and the other set of control points A, B, C, D, is needed to draw two cubic Bezier curves. Specify the conditions which would be essential to make sure:
a) That the two curves join.
b) That the two curves join smoothly.
Q4. What do you mean by the term vanishing points? Point out how you compute the vanishing point when viewing the 3D object.
Q5. A light source of intensity 25 units is throwing light on the flat object at distance D. The ray makes an angle of 30o with the normal to surface. Write down an expression for the diffuse reflection from object. State any constants which appear in your expression.
Q6. What do you mean by the axonometric view in the computer graphics? Point out, in brief, how you generate such a view on the screen.
Q7. Illustrate the main benefit of the Mid-point subdivision method of line clipping? Indicate in brief how a line gets clipped against an edge by using this algorithm.