Operations that are applied to
the geometric description of an object to change its position, orientation, or
size are called geometric transformations. Geometric
transformations can be used to describe how objects might move around in a
scene during an animation sequence or simply to view them from another angle
Geometric
transformations
1. Translation
2. Rotation
3. Scaling
4. Reflection
5.
shearing.
Two-Dimensional Rotation
1. We generate a rotation
transformation of an object by specifying a rotation axis and a rotation angle.
2. A two-dimensional rotation of an
object is obtained by repositioning the object along a circular path in the xy
plane.
3.
Parameters
for the two-dimensional rotation are
–The rotation angle θ
–A
position (x,y) – rotation point (pivot point)
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