Page 78 - DCAP504_Computer Graphics
P. 78

Unit 6: 2-D Transformation




                  About the X
                  axis




















                  About the
                  origin


















                  Within the
                  same quadrant





















               6.1.4   Rotation Transformation
               The rotation transformation rotates the object by an angle θ . As shown in figure  6.6, the point
               coordinate P = (x, y) is rotated by an angle θ . The rotation takes place with respect to the origin and in
               counterclockwise direction. After rotation the point coordinate P is transformed to a new position P' =
               (x', y').







                                        LOVELY PROFESSIONAL UNIVERSITY                           71
   73   74   75   76   77   78   79   80   81   82   83