Everything so far

Basic game functionality.

PythonInvaders.py

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+#!/usr/bin/python2.7
+
+import pygame
+from pygame.locals import *
+from random import randint, uniform
+import time
+import sys
+
+# Settings, enter whatever values you like
+jump_power = 7 #How high can you jump?
+shot_power = 7 #How hard can you shoot?
+ammo_on_kill = 2 #Ammo awarded on kill
+score_on_kill = 10 #Score awarded on kill
+enemy_damage = 30 #Score lost on enemy collision
+score = 0 #Starting score
+ammo = 20 #Starting ammo
+font_name = "Inconsolata" #Font family for text
+font_size = 25 #Font size for text
+
+#Init lists
+shots = []
+enemies = []
+
+#Init game
+screen = pygame.display.set_mode((500, 500), DOUBLEBUF)
+pygame.init()
+
+# initialize font; must be called after 'pygame.init()' to avoid 'Font not Initialized' error
+font = pygame.font.SysFont(font_name, font_size)
+
+#Classes
+class Entity(object): #The main class for objects on screen
+    def __init__(self, x, y, filename, movement=None, gravity=0.1):
+        self.alive = True
+        self.x = x
+        self.y = y
+        self.image = pygame.image.load(filename)
+        if movement is None:
+            self.movement = [0, 0]
+        else:
+            self.movement = movement
+        self.gravity = gravity
+    def update(self):
+        self.movement[1] += self.gravity
+        self.x += self.movement[0]
+        self.y += self.movement[1]
+
+        if self.y > 500:
+            self.alive = False
+    def draw(self):
+        screen.blit(self.image, (self.x, self.y))
+    def rect(self):
+        return pygame.rect.Rect(self.x, self.y, self.image.get_rect().width,
+                                self.image.get_rect().height)
+
+class Shot(Entity):
+    def __init__(self, x, y, movement=None):
+        global shot_power
+        super(Shot, self).__init__(x, y, 'shot.png', movement)
+
+class Car(Entity):
+    def __init__(self):
+        super(Car, self).__init__(200, 350, 'car.png')
+    def update(self):
+        super(Car, self).update()
+        if self.y < 0:
+            self.y = 0
+        elif self.y > (500 - self.image.get_rect().height):
+            self.y = 500 - self.image.get_rect().height
+            self.movement[1] = 0
+
+        if self.x < 0:
+            self.x = 0
+        elif self.x > (500 - self.image.get_rect().width):
+            self.x = 500 - self.image.get_rect().width
+    def jump(self):
+        if self.y >= (500 - self.image.get_rect().height):
+            global jump_power
+            self.movement[1] = -jump_power
+    def shoot(self):
+        global ammo
+        if ammo > 0:
+            ammo -= 1
+            shots.append(Shot(self.x + self.image.get_rect().width/2, car.y, [0, -shot_power]))
+
+class Enemy(Entity):
+    justCollided = False
+    def __init__(self):
+        self.image = pygame.image.load('enemy.png')
+        super(Enemy, self).__init__(randint(0, 500 - self.image.get_rect().width), randint(0, 200), 'enemy.png', [uniform(1.0, 5.0), 0], 0)
+    def update(self):
+        super(Enemy, self).update()
+        if self.x < 0 or self.x > 500 - self.image.get_rect().width:
+        	self.movement[0] = -self.movement[0];
+        if self.y >= 500:
+            global score
+            score += score_on_kill
+            global ammo
+            ammo += ammo_on_kill
+            self.alive = False
+        if (not self.rect().colliderect(car.rect())) and self.justCollided:
+            self.justCollided = False
+        if self.rect().colliderect(car.rect()) and not self.justCollided:
+            self.justCollided = True
+            global score
+            if score - enemy_damage < 0:
+                score = 0
+            else:
+                score -= enemy_damage
+
+class Button(Entity):
+    def __init__(self, x, y):
+        super(Button, self).__init__(x, y, 'button.png', gravity=0)
+    def update(self):
+        if self.rect().colliderect(car.rect()):
+            enemies.append(Enemy())
+        else:
+            self.y = 500 - 8
+
+enemies = [Enemy(), Enemy(), Enemy()]
+car = Car()
+button = Button(0, 500-8)
+
+while True:
+    #Check input
+    for event in pygame.event.get():
+        if event.type == QUIT:
+            pygame.quit()
+            print 'Exiting...'
+            sys.exit()
+        elif event.type == KEYDOWN:
+            if event.key == K_RIGHT:
+                car.movement[0] += 10
+            elif event.key == K_LEFT:
+                car.movement[0] += -10
+            elif event.key == K_DOWN:
+                car.gravity = 0.5
+            elif event.key == K_SPACE:
+                car.jump()
+            elif event.key == K_z:
+                car.shoot()
+        elif event.type == KEYUP:
+            if event.key == K_RIGHT:
+                car.movement[0] -= 10
+            elif event.key == K_LEFT:
+                car.movement[0] -= -10
+            elif event.key == K_DOWN:
+                car.gravity = 0.1
+
+    #Update stuff
+    for entity in shots + enemies:
+        entity.update()
+
+    for shot in shots:
+        for enemy in enemies:
+            if shot.rect().colliderect(enemy.rect()):
+                enemy.gravity = 0.1
+                shot.alive = False
+
+    enemies = [enemy for enemy in enemies if enemy.alive]
+    shots = [shot for shot in shots if shot.alive]
+
+    if len(enemies) == 0:
+        enemies.append(Enemy())
+        enemies.append(Enemy())
+        enemies.append(Enemy())
+
+    car.update()
+    button.update()
+
+    #Draw everything to screen
+    screen.fill((255, 255, 255))
+
+    for entity in enemies + shots:
+        entity.draw()
+
+    car.draw()
+    button.draw()
+
+    #Render text
+    textlines = []
+    linenumber = 0
+    textlines.append(font.render("Score: " + str(score), 1, (0,0,0)))
+    textlines.append(font.render("Ammo: " + str(ammo), 1, (0,0,0)))
+    if car.gravity == 0.5:
+        textlines.append(font.render("GRAVITY", 1, (0,0,0)))
+    if score == 420:
+        textlines.append(font.render("Blaze it!", 1, (0,0,0)))
+
+    for line in textlines:
+        screen.blit(line, (0, linenumber * (font_size + 5)))
+        linenumber += 1
+
+
+    pygame.display.flip()
+    time.sleep(0.01)