Untitled_192.py

Untitled_192.py

from scene import *
import math

class myscene(Scene):
	def setup(self):
		a=SpriteNode('plf:LaserPurple')
		self.add_child(a)
		self.a=a
		a.position=(0,300)
		a.vel=[180,120]
		a.damping=.5
		self.g=100
		a=SpriteNode('plf:LaserPurpleDot')
		self.add_child(a)
		self.a=a
		a.position=(0,300)
		a.vel=[90,60]
		a.damping=.1
		self.g=100
	def do_physics(self):
		''' dumbed down physics
		'''
		for n in self.children:
			# velocity changes per gravity
			if hasattr(n,'vel'):
				n.vel[1]-=self.g*self.dt
			# if we hit the floor, bounce by reflecting vertical velocty, with some damping
			if n.position.y+(n.vel[1]*self.dt)<0:
				n.vel[1]*=-(1-n.damping)
			# add some friction on the ground
			if Point(n.position.x,0) in n.bbox:
				n.vel[0]*=0.95 #fridtion
			n.run_action(Action.move_by(n.vel[0]*self.dt, n.vel[1]*self.dt,self.dt))
			n.run_action(Action.rotate_to(math.atan2(n.vel[1],n.vel[0])))
	def update(self):
		if self.t>1:
			self.do_physics()
s=myscene()
run(s)