solar system in python
import turtle
import math
class SolarSystem:
def __init__(self, width, height):
self.thesun = None
self.planets = []
self.ssturtle = turtle.Turtle()
self.ssturtle.hideturtle()
self.ssscreen = turtle.Screen()
self.ssscreen.setworldcoordinates(-width/2.0,-height/2.0,width/2.0,height/2.0)
self.ssscreen.tracer(50)
def addPlanet(self, aplanet):
self.planets.append(aplanet)
def addSun(self, asun):
self.thesun = asun
def showPlanets(self):
for aplanet in self.planets:
print(aplanet)
def freeze(self):
self.ssscreen.exitonclick()
def movePlanets(self):
G = .1
dt = .001
for p in self.planets:
p.moveTo(p.getXPos() + dt * p.getXVel(), p.getYPos() + dt * p.getYVel())
rx = self.thesun.getXPos() - p.getXPos()
ry = self.thesun.getYPos() - p.getYPos()
r = math.sqrt(rx**2 + ry**2)
accx = G * self.thesun.getMass()*rx/r**3
accy = G * self.thesun.getMass()*ry/r**3
p.setXVel(p.getXVel() + dt * accx)
p.setYVel(p.getYVel() + dt * accy)
class Sun:
def __init__(self, iname, irad, im, itemp):
self.name = iname
self.radius = irad
self.mass = im
self.temp = itemp
self.x = 0
self.y = 0
self.sturtle = turtle.Turtle()
self.sturtle.shape("circle")
self.sturtle.color("yellow")
def getName(self):
return self.name
def getRadius(self):
return self.radius
def getMass(self):
return self.mass
def getTemperature(self):
return self.temp
def getVolume(self):
v = 4.0/3 * math.pi * self.radius**3
return v
def getSurfaceArea(self):
sa = 4.0 * math.pi * self.radius**2
return sa
def getDensity(self):
d = self.mass / self.getVolume()
return d
def setName(self, newname):
self.name = newname
def __str__(self):
return self.name
def getXPos(self):
return self.x
def getYPos(self):
return self.y
class Planet:
def __init__(self, iname, irad, im, idist, ivx, ivy, ic):
self.name = iname
self.radius = irad
self.mass = im
self.distance = idist
self.x = idist
self.y = 0
self.velx = ivx
self.vely = ivy
self.color = ic
self.pturtle = turtle.Turtle()
self.pturtle.up()
self.pturtle.color(self.color)
self.pturtle.shape("circle")
self.pturtle.goto(self.x,self.y)
self.pturtle.down()
def getName(self):
return self.name
def getRadius(self):
return self.radius
def getMass(self):
return self.mass
def getDistance(self):
return self.distance
def getVolume(self):
v = 4.0/3 * math.pi * self.radius**3
return v
def getSurfaceArea(self):
sa = 4.0 * math.pi * self.radius**2
return sa
def getDensity(self):
d = self.mass / self.getVolume()
return d
def setName(self, newname):
self.name = newname
def show(self):
print(self.name)
def __str__(self):
return self.name
def moveTo(self, newx, newy):
self.x = newx
self.y = newy
self.pturtle.goto(newx, newy)
def getXPos(self):
return self.x
def getYPos(self):
return self.y
def getXVel(self):
return self.velx
def getYVel(self):
return self.vely
def setXVel(self, newvx):
self.velx = newvx
def setYVel(self, newvy):
self.vely = newvy
def createSSandAnimate():
ss = SolarSystem(2,2)
sun = Sun("SUN", 5000, 10, 5800)
ss.addSun(sun)
m = Planet("MERCURY", 19.5, 1000, .25, 0, 2, "blue")
ss.addPlanet(m)
m = Planet("EARTH", 47.5, 5000, 0.3, 0, 2.0, "green")
ss.addPlanet(m)
m = Planet("MARS", 50, 9000, 0.5, 0, 1.63, "red")
ss.addPlanet(m)
m = Planet("JUPITER", 100, 49000, 0.7, 0, 1, "black")
ss.addPlanet(m)
m = Planet("Pluto", 1, 500, 0.9, 0, .5, "orange")
ss.addPlanet(m)
m = Planet("Asteroid", 1, 500, 1.0, 0, .75, "cyan")
ss.addPlanet(m)
numTimePeriods = 20000
for amove in range(numTimePeriods):
ss.movePlanets()
ss.freeze()
createSSandAnimate()
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