# problem with exam task for college

jeltedeproft at hotmail.com jeltedeproft at hotmail.com
Sat Jan 5 13:24:15 CET 2013

```hy again,thanx, i updated my code with your more efficient approach :), so that possibly resolves problem number 2, but still leaves me with problem n°1, my code is still stuck in the first update of the fuel tank (brandstoftank), for the sake of your easyness i'll paste the code again

from visual import *
import time
import math
import random
from datetime import datetime
import operator

class lunar_lander(object):
def __init__(self):
scene.title = 'mini star wars'
scene.width = 375
scene.height = 550
scene.center = (0,0)
self.pos = (0,0)
self.axis = 0
self.brandstofmeter_view = brandstofmeter_view()
self.ruimteschip = ruimteschip()
self.view = game_view(self)

def play(self):
t=0
dt=0.01
while t<999999999:
time.sleep(0.01)
self.brandstofmeter_view.update()
self.ruimteschip.update(dt)
t = t + dt

class game_view(object):
def __init__(self,owner):
autoscale=True
box(pos=( 0, -375, 0), length=500, height=5, width=0, color = color.white)
box(pos=(0,375, 0), length=500, height=5, width=0, color = color.white)
box(pos=(-250,0, 0), length=5, height=750, width=0, color = color.white)
box(pos=(250,0, 0), length=5, height=750, width=0, color = color.white)

maan = curve(pos=[(-250,-353),(-240,-341),(-210,-354),(-199.5,-374)],color=color.red)
maana = curve(pos=[(-199.5,-374),(-166,-374)],color=color.green)
maanb = curve(pos=[(-166,-374),(-140,-357),(-80,-319),(-40,-361),(0,-321),(40,-329),(80,-347)],color=color.red)
maanc = curve(pos=[(80,-347),(140,-347)],color=color.green)
maand = curve(pos=[(140,-347),(162,-337),(189.5,-365),(210,-355),(240,-372),(250,-338)],color=color.red)

for i in random.sample(range (-250,250),20):
for j in random.sample(range (-375,375),20):
sterren = points(pos = [i,j,0],size = 2, color=color.white)

class brandstofmeter_view(object):
def __init__(self):
axis = 0
self.pos = (220,345)
self.meter = box(pos = self.pos, lenght = 25, height = 45,color = color.green)

def update (self):
s = scene.kb.getkey()
if (s == "up"):
self.meter.height = self.meter.height - 1

class ruimteschip(object):
def __init__(self):
self.pos = vector(0,330)
self.acceleration = vector(0,-88,0)
self.axis = (1,0,0)
self.hoek = (90*math.pi)/180
self.gas = vector(10 * cos(self.hoek),10 * sin (self.hoek))
self.velocity = vector(0,0,0)
self.angle = (1,0,0)
self.view = ruimteschip_view(self)
self.vlam = self.view.vlam
self.frame = self.view.frame

def update(self,dt):
self.velocity = self.velocity + (self.acceleration * dt)
self.pos = self.pos + self.velocity * dt
a = 0
b = 0
if scene.kb.keys:
a = a + 0.001
s = scene.kb.getkey()
if (s == "up"):
self.velocity = self.velocity + self.gas
self.vlam.visible = True
b = b + 2
if (s == "left"):
self.gas = rotate(self.gas,angle = math.pi/10, axis = (0,0,1))
(x,y,z) = self.frame.axis
self.frame.axis = (x,y,z-0.1)
if (s == "right") :
self.gas = rotate(self.gas,angle = -(math.pi/10), axis = (0,0,1))
(x,y,z) = self.frame.axis
self.frame.axis = (x,y,z+0.1)
if (a == 0):
self.vlam.visible = False

if self.pos.x > 250:
self.pos.x = -250
if self.pos.x < -250:
self.pos.x = 250
self.view.update(self)

class ruimteschip_view(object):
def __init__(self,owner):
self.owner = owner
self.frame = frame(pos = owner.pos,axis = owner.axis)
self.motor = curve(frame = self.frame,pos=[(0,24.0),(22.0,24.0),(22.0,39.0),(-22.0,39.0),(-22,24),(0,24)])
self.capsule = curve(frame = self.frame,color = color.blue ,pos=[(0,39),(-3,39),(-9,44),(-12,46),(-18,48),(-22,50),(-18,52),(-12,54),(-9,56),(-3,61),(0,61),(3,59),(9,56),(12,54),(18,52),(22,50),(18,48),(12,46),(9,44),(3,39),(0,39)])
self.poota = curve(frame = self.frame,pos = [(-18,24),(-20,24),(-20,0),(-18,0),(-18,24)])
self.pootb = curve(frame = self.frame,pos = [(18,24),(20,24),(20,0),(18,0),(18,24)])
self.vlam = curve(frame = self.frame,color = color.orange , visible=false,pos = [(0,24.0),(-9.0,14.0),(0,-5.0),(9,14.0),(0,24.0)])

def update(self,owner):
self.frame.axis = owner.axis
self.frame.pos = owner.pos

```