lander.py

'''
File name: lander.py
Author username(s): denneyen, jaltarnr
Date: 11/28/2017

lander.py
A module for writing a Lunar Lander game

Authors: Andy Exley, Erin Denney,  Nidhi Jaltare
'''

import interfaces
import graphics

class LunarLander:
    '''Fill in this class!
    '''
    def __init__(self, alt, vel, fuel):
        '''Constructor for a LunarLander object'''
        self.altitude = alt
        self.velocity = vel
        self.fuel = fuel

    def get_altitude(self):
        '''Returns this LunarLander's altitude'''
        return self.altitude

    def get_velocity(self):
        '''Returns this LunarLander's velocity'''
        return self.velocity

    def get_fuel(self):
        '''Returns this LunarLander's fuel'''
        return self.fuel

    def update(self, thrustamount):
        '''Update LunarLander attributes after some fuel is spent to fire
        the engine.'''
        # 1. Expend thrustamount units of fuel, or what is left
        if thrustamount > self.fuel:
            thrustamount = self.fuel
        self.fuel = self.fuel - thrustamount

        # 2. For each unit of fuel burnt, increase ship velocity by 4
        self.velocity = self.velocity + 4 * thrustamount

        # 3. Gravity
        self.velocity = self.velocity - 2

        # 4. Calculate new altitude
        self.altitude = self.altitude + self.velocity 

class LanderGame:
    '''This class represents a Lunar Lander Game
    '''

    def __init__(self):
        '''Constructor for the game'''
        self.interface = interfaces.GraphicLanderInterface()
        self.lander = LunarLander(200, 0, 30)
        
    def play(self):
        '''This is the method that plays the game'''
        while self.lander.get_altitude() > 0:
            self.interface.show_info(self.lander)
            amt = self.interface.get_thrust()
            self.lander.update(amt)
        if self.lander.get_velocity() < -10:
            self.interface.show_crash()
        else:
            self.interface.show_landing()
        self.interface.close()

def main():
    game = LanderGame()

    game.play()

if __name__ == '__main__':
    main()