def __init__(self):
self.bodies = list()
self.joints = list()
self.time = 0
Clock.schedule_interval(self.main_loop, 1 / 60.)
self.bodies.append(Plane(Vector2(-1, 0), xDistance))
self.bodies.append(Plane(Vector2(0, -1), yDistance))
self.bodies.append(Plane(Vector2(1, 0), 0))
self.bodies.append(Plane(Vector2(0, 1), 0))
Window.bind(on_motion=self.on_motion)
for ii in range(0, 4):
mass = 20
if ii == 0:
circle = Circle(
mass, Vector2(Window.width / 2.0, Window.height - 20), 0)
circle.setColor(color=(random(), random(), random()))
self.bodies.append(circle)
else:
circle = Circle(mass, Vector2.randomRadius(20), mass)
circle.setColor(color=(random(), random(), random()))
self.bodies.append(circle)
for jj in range(4, 7):
self.joints.append(
DistanceConstraint(self.bodies[jj], self.bodies[jj + 1], 60))
super(BounceBallWidget, self).__init__()
def on_touch_down(self, touch):
touchedCircle = touchingCircle(self.bodies, touch)
if touchedCircle:
touch.ud['circle'] = touchedCircle
touch.ud['mass'] = touchedCircle.m_mass
touch.ud['tail'] = list()
touchedCircle.m_mass = 0
touchedCircle.m_velocity = Vector2()
else:
mass = int(random() * 10) + 10
circle = Circle(mass, Vector2(touch.x, touch.y), mass,
Vector2(0, -550))
color = (random(), random(), random())
circle.setColor(color)
self.bodies.append(circle)
