Become familiar with visual programming.
Program the Orca to swim using basic motion commands.
Understand sequential execution of commands and repetition (forever and repeat loops).
Understand the concepts of Cartesian coordinate system.
Open Tickle app and go over the welcome tutorial that shows you how to drag and drop coding blocks. You can replay the tutorial in Settings -> Show Introduction as needed.
Settings -> Show Introduction
If you don't already have a Orca project open, create a new one by tapping + New Project in "MY PROJECTS". Choose the template with the name "Orca".
+ New Project
Tap the green Play button and see how the Orca swims in a circle.
Move your fingers to different parts of the ocean, and see how the Orca follows your fingers.
To make Orca swim in a circle, we program the Orca to move forward 10 steps, and then turn by 10 degrees. Because turning a full circle is 360 degrees, we need to repeat the move and the turn blocks 36 times each.
Here we use the repeat 36 times block, and add the move and turn blocks inside this yellow block so that each will executed 36 times.
repeat 36 times
go to ...
go to last touch point
The coordinate system of Tickle is a 2-dimensional Cartesian coordinate system. The origin (0, 0) is at the center of the stage.
The X axis ranges from -240 to +240, and the Y axis ranges from -180 to +180.
All characters starts with a direction of 0 degrees. The degrees increases counterclockwise from 0° which points to the right.