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. You may find sides 16 to 40 of the apjavaProcessing slide presentation helpful.
- Sign up for a free GitHub account
- Then fork this repository
- Open the Lightning.pde file. Copy and paste the code into Processing.
- At the top of the program in Processing, declare 4
int
variablesstartX
,startY
,endX
andendY
. InitializestartX
to 0,startY
to 150,endX
to 0 andendY
to 150 void setup()
needs to set thestrokeWeight()
andbackground()
of your appletvoid draw()
needs to do two things:
-set thestroke()
color of the lightning bolt to some random value usingMath.random()
-awhile
loop that repeats the following until theendX
is off the screen:- set
endX
tostartX
plus a random integer from 0 to 9 - set
endY
tostartY
plus a random integer from -9 to 9 - draw a
line()
with endpointsstartX
,startY
,endX
,endY
- set
startX
equal toendX
- set
startY
equal toendY
- set
void mousePressed()
needs to setstartX
,startY
,endX
,endY
back to their original values.- When you are happy with the program, copy and paste it back into GitHub
- You will also 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 submit the URL for your website to google classroom. Don't hesitate to ask for help if your aren't sure how something is suppose to work.
The steps above are only a suggestion. Your program needs to use 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!
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