Math.random() Work First

• Start by accepting the assignment. (Done if you are reading this).

• Next clone the project on your laptop.

• Work through Math.random worksheet first. I have blank print outs at my desk. Put any sample code you use to complete the worksheet inside of a class called RandomPractice.java of this project directory. Be sure to git commit this work along with our Lightning Bolt Project.

• Work on the random walk assignment:

Lightning Bolt

One way to simulate lightning is with a random walk. In this assignment you will create a program that uses a random walk to seemingly shoot lightning from one side of the screen to the other every time the mouse is pressed.

• Open the Lightning.pde file in Processing (it is located in the Lightning directory).
• At the top of the program, declare 4 int variables: startX, startY, endX and endY.
• void setup() needs to:
  • Set the variables to an initial value startX to 0, startY to 150, endX to 0 and endY to 150
    • startX to 0,
    • startY to 150,
    • endX to 0
    • endY to 150
  • set the strokeWeight() and background() of your app.
• void draw() needs to do two things:
  • set the stroke()color of the lightning bolt to some random value using Math.random()
  • Create a while loop that repeats the following steps until the endX is off the screen (translate the following instructions to java code in the order for which they appear).
    1. set endX = startX + a random integer from 0 to 9
    2. set endY = startY + a random integer from -9 to 9
    3. draw a line() with endpoints startX,startY,endX,endY
    4. set startX equal to endX
    5. set startY equal to endY
• Create a void mousePressed() method. The method needs to:
  • set startX,startY,endX,endY back to their initial values.
• You will need to modify index.html to customize your website with it's own title, headline and footer. When you are happy with your program, push your finished project up to GitHub
• The final step is to update your portfolio with references to this project, just like you did for Coat of Arms

Program requirements

Your program needs to create a random walk using Math.random() for all random numbers in the assignment. Other than that, your lightning program doesn't have to work or look like any other. Have fun and be creative!

Samples of Student Work

• clouds and lightning
• he who shall not be named
• rainbow bolt