Moss/sprite_stacking_engine/player.py

#!/usr/bin/python3

from sprite_stacking_engine.settings import *
import math


class Player(pygame.sprite.Sprite):
    def __init__(self, engine):
        self.engine = engine
        self.app = engine.app
        self.group = self.engine.main_group
        super().__init__(self.group)

        self.group.change_layer(self, CENTER.y)  # simpy set the layer to the y center of the screen because that is -
        # the position of the player on the screen

        size = vec2([50, 50])  # create a surface with a red dot on it
        self.image = pygame.Surface(size, pygame.SRCALPHA)
        pygame.draw.circle(self.image, "red", size / 2, size[0] / 2)
        self.rect = self.image.get_rect(center=CENTER)

        self.offset = vec2(0)
        self.inc = vec2(0)
        self.angle = 0
        self.diag_move_corr = 1 / math.sqrt(2)

    def control(self):  # move the player and rotate the view according to the key presses
        self.inc = vec2(0)
        speed = PLAYER_SPEED * self.app.delta_time
        rot_speed = PLAYER_ROT_SPEED * self.app.delta_time

        key_state = pygame.key.get_pressed()

        if key_state[pygame.K_LEFT]:
            self.angle -= rot_speed

        if key_state[pygame.K_RIGHT]:
            self.angle += rot_speed

        if key_state[pygame.K_w]:
            self.inc += vec2(0, -speed).rotate_rad(-self.angle)

        if key_state[pygame.K_s]:
            self.inc += vec2(0, speed).rotate_rad(-self.angle)

        if key_state[pygame.K_a]:
            self.inc += vec2(-speed, 0).rotate_rad(-self.angle)

        if key_state[pygame.K_d]:
            self.inc += vec2(speed, 0).rotate_rad(-self.angle)

        if self.inc.x and self.inc.y:
            self.inc *= self.diag_move_corr

    def update(self):
        self.control()
        self.move()

    def move(self):
        self.offset += self.inc