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from setup import *
from colors import COLOR_BLACK
class Player:
width, height = 25, 50
color = COLOR_BLACK
jump_power = 0.8
gravity = 0.0015
movement_acceleration = 0.0025
horizontal_resistance = 0.005
# Called on player creation
def __init__(self, x, y):
self.position = pygame.Vector2(x, y)
self.velocity = pygame.Vector2(0, 0)
self.acceleration = pygame.Vector2(0, self.gravity)
# Launches the player up
def jump(self):
self.velocity.y = -self.jump_power
# Sets the horizontal acceleration to accelerate left
def move_left(self):
self.acceleration.x -= self.movement_acceleration
# Sets the horizontal acceleration to accelerate right
def move_right(self):
self.acceleration.x += self.movement_acceleration
# Makes the player jump when they fall onto a platform
def resolve_platform_collisions(self, delta_time, platforms):
# How much error to account for when collision detection is performed
epsilon = abs(self.velocity.y) * delta_time
player_left = self.position.x
player_right = self.position.x + self.width
for platform in platforms:
platform_left = platform.position.x
platform_right = platform.position.x + platform.width
# If the player is overlapping horizontally with the platform
if player_left < platform_right and player_right > platform_left:
# If the player's bottom is aligned with the top of the platform with error epsilon
if abs((self.position.y + self.height) - platform.position.y) < epsilon:
# Only stop the player if it is falling
if self.velocity.y > 0:
self.jump()
# When the player goes off the left or right of the screen, teleport them to the other side
def screen_wrap(self):
if self.position.x > SCREEN_WIDTH:
self.position.x = -self.width
if self.position.x < -self.width:
self.position.x = SCREEN_WIDTH
# True if the top of the player falls below the bottom of the screen
def is_dead(self, camera_y):
return self.position.y - self.height - camera_y > SCREEN_HEIGHT
# Does player logic every frame
def update(self, delta_time):
self.position += self.velocity * delta_time
self.velocity += self.acceleration * delta_time
self.screen_wrap()
# Slow down the player; this prevents the player from infinitely increasing their velocity
# with their acceleration, as well as slows them down when they wish to stop moving
self.velocity.x *= max(0, 1 - (delta_time * self.horizontal_resistance))
# Reset x acceleration to zero at the end of every frame. move_left and move_right are
# called every frame when their respective inputs are pressed, so as long as they are still
# pressed, acceleration will be increased again. When the input is released, this
# will handle setting the x acceleration to zero.
self.acceleration.x = 0
# Draws player every frame
def draw(self, screen, camera_y):
r = pygame.Rect(self.position.x, self.position.y - camera_y, self.width, self.height)
pygame.draw.rect(screen, self.color, r)
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