Using the Mouse

You should have seen some examples in Khan Academy of how you can use the computer's mouse to interact with your sketches. Here is a very simple example for you to start with. Note that you can EITHER move the mouse to leave a trail of circles OR you can click the mouse button (press and release) to change colour. If you click while moving, the colour won't change.

Source code: Code for using mouse functions

Look at the source code by clicking on the link above. Do you understand how it works? Now YOU try it. You may start by copying code from this example, but then change it to make it more interesting:

• Can you make a more complicated shape move around?
• Can you keep clearing the background in the draw() function so it doesn't leave a trail?
• Can you change the size or shape instead of the colour?
• Look in the Reference manual for other mouse functions. Try using them.

Continue with how to use mouse variables.