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frogGame
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FROG GAME

 

 

GAME DESCRIPTION

 

A frog has to cross both roads without being run over. In our implementation, when the frog collides with a car, it is not ‘really’ run over, but is instead returned to its starting position at the bottom of the window, where it can try again. Once it reaches the green stripe at the top of the window, it has reached its goal.

The frog can be moved by pressing the left mouse button. With each click, it moves forward a little. The speed of the moving cars can be adjusted by changing the simulation period (setSimulationsPeriod()).

Program: 

from gamegrid import *
import random
from soundsystem import *

# ------------- class Car -------------------------------
class Car(Actor):
    def __init__(self, carNb):
        Actor.__init__(self, ["sprites/car" + str(carNb) + ".gif"])
    
    def act(self):
        self.move()
        if self.getLocation().x < -100:
              self.setLocation(Location(1650, self.getLocation().y))
        if self.getLocation().x > 1650:
              self.setLocation(Location(-100, self.getLocation().y))
 
# --------------------- class Frogg ---------------------
class Frog(Actor):
    def __init__(self):
        Actor.__init__(self, True, "sprites/frog.gif")
        
    def act(self):
        if self.getY() > 10 and self.getY() < 25:
            play()  
          
    def collide(self, actor1, actor2):
        play()
        actor1.setLocation(Location(400, 560))
        return 0                   

# ------------- mouse -------------------------------
def pressCallback(e):
      frog.setLocation(Location(frog.getLocation().x, 
                                frog.getLocation().y - 10))       

# ------------- main -------------------------------
makeGameGrid(800, 600, 1, None,"sprites/lane.gif", False, 
             mousePressed = pressCallback)
frog = Frog()
addActor(frog, Location(400, 560))
cars = []
for i in range(20):
    cars.append(Car(i))  
for i in range(1, 5):
    cars[i].setHorzMirror(True)
    frog.addCollisionActor(cars[i])
    addActor(cars[i], Location(350 * i, 90), Location.WEST)      
for i in range(5, 10):
    frog.addCollisionActor(cars[i])
    addActor(cars[i], Location(350 * (i - 5), 350), Location.WEST)
for i in range(10, 15):
    frog.addCollisionActor(cars[i])
    addActor(cars[i], Location(350 * (i - 10), 220), Location.EAST)
for i in range(15, 20):
    cars[i].setHorzMirror(True)
    frog.addCollisionActor(cars[i])
    addActor(cars[i], Location(350 * (i - 15), 480), Location.EAST)

show()
setSimulationPeriod(60)
openSoundPlayer("wav/frog.wav")
doRun()
► copy To Clipboard

 

 

Explanations of the programme code
 
1. class Car(Actor):  Defines cars that move from the left to the right or back.

2. cars[i].setHorzMirror(True): For cars driving from right to left, the sprite image must be mirrored.
3.
collidate():The collision is defined in the Frog class. The frog is moved back to its starting position (400, 560), while the cars continue to move.
4. pressCallback() : When the left mouse button is pressed, the frog moves 10 pixels forward.
5. setSimulationPeriod(): The speed of the moving cars can be adjusted, and with it the difficulty level of the game.
6. openSoundPlayer("wav/frog.wav"): Prepares the sound file that is played when the frog collides with a car or reaches the finish line.

 

 

Tasks
 
1. Change the direction of movement of the cars so that they move as if on a two-lane motorway.

2. The trucks and large cars should drive in the right-hand lane, the other cars in the left-hand lane.