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How to use the Processing Library in the Trinket.io Web Based Coding Environment
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# NOTE: To run processing in the trinket.io environment, | |
# you need to import sin from math and import all from | |
# processing. Also, make sure to call run() at the very | |
# end of your python script! | |
# Code by Peter Farrell from his book | |
# Math Adventures with Python | |
from math import sin | |
from processing import * | |
#CircleSineWave.pyde | |
r1 = 100 #radius of big circle | |
r2 = 10 #radius of small circle | |
t = 0 #time variable | |
circleList = [] | |
def setup(): | |
size(600,600) | |
def draw(): | |
global t, circleList | |
background(200) | |
#move to left-center of screen | |
translate(width/4,height/2) | |
noFill() #don't color in the circle | |
stroke(0) #black outline | |
ellipse(0,0,2*r1,2*r1) | |
#circling ellipse: | |
fill(255,0,0) #red | |
y = r1*sin(t) | |
x = r1*cos(t) | |
#add point to list: | |
circleList.insert(0,y) | |
ellipse(x,y,r2,r2) | |
stroke(0,255,0) #green for the line | |
line(x,y,200,y) | |
fill(0,255,0) #green for the ellipse | |
ellipse(200,y,10,10) | |
if len(circleList)>300: | |
circleList.remove(circleList[-1]) | |
#loop over circleList to leave a trail: | |
for i,c in enumerate(circleList): | |
#small circle for trail: | |
ellipse(200+i,c,5,5) | |
t += 0.05 | |
# Remember to call run() at the very end of your script! | |
run() |
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