Page 79 - Digicode_AI_class_4
P. 79

The ‘X’ position can range from 240 to -240. Y position can range
                          from 180 to -180.



                                                                                 Critical Thinking
                   code Quest                                                    Information Literacy



                 1.  Which block is also called a wrap block?


                 2.  Which block stops the script from functioning?






            Direction                                                                  –15  0   15
                                                                                   –30              30
            The words up and right are perfectly understood                   –45                       45
            as  directions  by  human  beings.  But  the  Sprite            –60                            60
            needs  a  number  to  indicate  the  exact  direction.
                                                                          –75                                75
            The direction numbers are between −180 and 180
                                                                         –90                                 90
            degrees.  Pointing  at  0  degrees  means  facing  up
            with respect to the Sprite. Pointing at 90 degrees           –105                                105

            is facing to the right with respect to Sprite. Also,           –120                            120
            notice that −180 and 180 degrees point in the same                –135                       135
            direction: down.                                                      –150               150
                                                                                      –165  ±180  165
            Some of the commonly used motion blocks are:


                          Blocks                                           Functions

                      move 10   steps            This block lets the Sprite move forward (in the direction
                                                 it is facing).
                    turn    15  degrees          This block turns Sprite in clockwise direction.


                    turn    15  degrees          This block turns Sprite in an anti-clockwise direction.


                     go to x: 0  y: 0            This block moves the Sprite to a specified XY position.


                         set x to 0              This block changes position of Sprite on X-axis according
                                                 to the specified position.


                      change x by 10             This block changes position of Sprite on X-axis by specified
                                                 number of steps.


                                                                                      Blocks in Scratch   77
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