COMPUTER SCIENCE AND ENGINEERING
COMPUTER GRAPHICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
P’=R*P
|
|
|
P’=P+T
|
|
|
P’=P*P
|
|
|
P’=R+P
|
Detailed explanation-1: -Answer : B, Explanation-The two-dimensional rotation equation in the matrix form is P’=R*P.
Detailed explanation-2: -2D Rotation is a process of rotating an object with respect to an angle in a two dimensional plane. Consider a point object O has to be rotated from one angle to another in a 2D plane.
Detailed explanation-3: -Answer : C, Explanation-Positive values for the rotation angle defines Counterclockwise rotations about the piovt points.
Detailed explanation-4: -A two-dimensional rotation is applied to an object by repositioning it along a circular path in the xy plane. To generate a rotation, we specify a rotation angle and the position (xr, yr) of the rotation point (or pivot point) about which the object is to be rotated (Fig.
Detailed explanation-5: -The positive value of the pivot point (rotation angle) rotates an object in a counter-clockwise (anti-clockwise) direction. The negative value of the pivot point (rotation angle) rotates an object in a clockwise direction.