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@Ram-N
Last active Jun 29, 2020
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Processing_py - Balls criss-crossing
class Ball(object):
def __init__(self,_id, _x, _y, _vx=0, _vy=0):
self.x, self.y = _x, _y
self.vx, self.vy = _vx, _vy
self.id = _id
#store the starting coords of each ball. For relaunching.
self.startx, self.starty = _x, _y
self.active = False
def move(self):
self.x += self.vx
self.y += self.vy
#check for out of bounds
if self.x > width or self.y > height or self.x <0 or self.y < 0:
self.x=self.startx
self.y=self.starty
def display(self):
ellipse(self.x, self.y, 20,20)
w, h = 800, 800
from ball import Ball
num_set = 8 #half the balls are horizontal, the other half will move vertically
num_balls = num_set * 2
hballs = [Ball(id,0,h/2,5,0) for id in range(num_set)]
vballs = [Ball(id+num_set, w/2,h, 0,-5) for id in range(num_set)]
balls = [None]*(len(hballs)+len(vballs)) #placeholder
balls[::2] = hballs #odd places
balls[1::2] = vballs #even elements
num_active = 0
launch_gap = num_balls
def setup():
size(w,h)
background(127)
smooth()
noStroke()
def draw():
global balls, num_active
background(127)
#when to launch?
if num_active < num_balls:
if not frameCount%(launch_gap):
balls[num_active].active = True #launch one more ball
num_active+=1
#move each ball and show it on the screen
for b in balls:
if b.active:
b.move()
b.display()
@Ram-N
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Ram-N commented Jun 29, 2020

These files are both Python Processing scripts. Save them to as your sketches and launch Processing to see the balls moving across your screen.
https://py.processing.org/

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