Creative Coding, Week 3 example 2

circle.py

class Circle(object):
    HalfWidth = 0

    def __init__(self, x, y, speed=random(10), phase=random(TAU)):
        self.x = x
        self.y = y
        self.speed = speed
        self.phase = phase
        self.holdX = self.x

    def _calcX(self):
        if self.speed == 0:
            pass
        else:
            self.x = (Circle.HalfWidth
                      + sin(radians(frameCount * self.speed) + self.phase)
                      * 200)

    def render(self, x, Radius):
        self._calcX()
        fill(self.x - 128, self.x - 64, self.x - 32)
        ellipse(x, self.y, Radius, Radius)

w3_02.pyde

"""
 * Creative Coding
 * Week 3, 02 - array with sin()
 *
"""
from circle import Circle

NumCircles = 20
Radius = 20
SpeedFloor = 0.5
circles = None


def setup():
    size(500, 500, P2D)
    Circle.HalfWidth = width / 2
    gap = height / (NumCircles + 1)
    circles = [Circle(0, gap * (i + 1),
                      SpeedFloor, phase(i))
               for i in range(NumCircles)]

def draw():
    background(128)
    for circle in circles:
        if circle.speed == 0:
            circle.render(circle.holdX, Radius)
        else:
            circle.render(circle.x, Radius)


def phase(i):
    return sin(width / 2 + radians(i)) + i * 0.5


def mouseClicked():
    for circle in circles:
        if (dist(mouseX, mouseY, circle.x, circle.y) <= Radius):
            if circle.speed > 0:
                circle.speed = 0
                circle.phase = 0
                circle.holdX = circle.x
                break
            elif circle.speed == 0:
                circle.speed = random(SpeedFloor, 3)
                circle.phase = random(TAU)
                break