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from setup import *
from player import Player
from platform import Platform, PlatformManager
# Class which handles the main game logic and drawing
class Jumper:
camera_acceleration = 0.0000025
jump_power_increase_rate = 0.000005
distance_per_score = 20
# Called on game initialization
def __init__(self):
# Creates an instance of platform manager
self.platform_manager = PlatformManager()
# Camera only moves up, so we only need a y position
self.camera_y = 0
# The speed at which the camera will move up
self.camera_speed = 0.1
# Create our player at the position such that it will land on the platform in the middle of
# the screen
starting_platform_position_y = (SCREEN_HEIGHT -
PlatformManager.platform_spread *
PlatformManager.starting_platform_slot -
Platform.height)
self.player = Player(SCREEN_WIDTH / 2, starting_platform_position_y - Player.height)
# Create the variable which will keep track of the user's score
self.score = 0
# Moves the camera every frame
def update_camera_position(self, delta_time):
# Move the camera down
self.camera_y -= self.camera_speed * delta_time
# If the player jumps higher than the camera y position, set the camera y to match the
# position of the player
if self.player.position.y < self.camera_y:
self.camera_y = self.player.position.y
# Increase game difficulty over time
def update_difficulty(self, delta_time):
self.camera_speed += delta_time * self.camera_acceleration
self.player.jump_power += delta_time * self.jump_power_increase_rate
# Update the score based on the highest y position the player has reached
def update_score(self):
self.score = max(self.score, int(-self.player.position.y / self.distance_per_score))
# Updates the game logic every frame
def update(self, delta_time):
self.player.resolve_platform_collisions(delta_time, self.platform_manager.platforms)
self.player.update(delta_time)
self.update_difficulty(delta_time)
self.update_score()
self.update_camera_position(delta_time)
# Continuously check for key presses
pressed = pygame.key.get_pressed()
if pressed[pygame.K_RIGHT]:
self.player.move_right()
if pressed[pygame.K_LEFT]:
self.player.move_left()
# Perform platform creation and deletion as necessary
self.platform_manager.update(self.camera_y)
# Draws all game objects every frame
def draw(self, screen):
self.player.draw(screen, self.camera_y)
self.platform_manager.draw(screen, self.camera_y)
self.draw_score(screen)
# Draw the score to the screen
def draw_score(self, screen):
# Use the largest font
text_font = FONT_BIGGER
text_color = (0, 0, 0)
# Get the middle of the screen
position_x, position_y = SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2
# Create a surface with the score drawn on it
text_surface = text_font.render(str(self.score), True, text_color)
# Calculate where the top left of the surface should be put
top_left = (position_x - text_surface.get_width() / 2,
position_y - text_surface.get_height() / 2)
# Make the score text translucent
text_surface.set_alpha(int(255 * 0.25))
# Draw the text surface onto the screen
screen.blit(text_surface, top_left)
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