Adjust the boy sprite animation

Hello, and welcome back, we are almost done coding the player animation mechanism after we have finished the player boundary detection mechanism in the last article but before we can go to the next stage we need to tidy up the player animation mechanism first by introducing the standstill image of the boy when the boy is not moving and that image will either face left or right or up or down based on the direction of the boy at the time he stops moving. In order to achieve this we only need to edit two files.

The first file we need to edit is the main file where we will include the keyup event so we can set the x different or y different to zero when the boy who is moving in either x or y-direction suddenly stop moving.

import pygame
from pygame.locals import *
from GameManager import GameManager

pygame.init()

size = width, height = 640, 640
pygame.display.set_caption("Amaze Boy")  # set the title of the window
screen = pygame.display.set_mode(size)
game_manager = GameManager(screen)
rect_exit = Rect(229, 456, 200, 53)  # the position of the exit button on the home scene
running = True
pygame.key.set_repeat(100, 40)

while running:

    for event in pygame.event.get():
        # when the user clicks on the 'x'
        if event.type == pygame.QUIT:
            game_manager.save_level()
            running = False

        # detect key press event
        if event.type == KEYDOWN:

            if (game_manager.state == 1):

                if event.key == K_LEFT:
                    game_manager.set_player_x(-2)
                elif event.key == K_RIGHT:
                    game_manager.set_player_x(2)
                elif event.key == K_UP:
                    game_manager.set_player_y(-2)
                elif event.key == K_DOWN:
                    game_manager.set_player_y(2)

        elif event.type == KEYUP:

            if (game_manager.state == 1):

                if event.key == K_LEFT:
                    game_manager.set_player_x(0)
                elif event.key == K_RIGHT:
                    game_manager.set_player_x(0)
                elif event.key == K_UP:
                    game_manager.set_player_y(0)
                elif event.key == K_DOWN:
                    game_manager.set_player_y(0)

        elif event.type == pygame.MOUSEBUTTONDOWN:
            x, y = event.pos
            if (rect_exit.collidepoint(x, y) and game_manager.state == game_manager.LOAD):
                game_manager.save_level()
                running = False
            # 1 is the left mouse button
            elif event.button == 1:
                game_manager.isAreaClick(x, y)

    game_manager.loop()

The next file we need to edit is the boy sprite class file where we will set the frame of the image to that of a standstill image of the boy depends on whether the boy is moving side-way or up-down before stopping.

from BoyObject import BoyObject
from pygame import math as mt
from pygame.locals import *
from GameSprite import GameSprite

class BoySprite(object):

    def __init__(self, scene, level):

        self.row = 10
        self.column = 10
        self.scene = scene # game scene instance
        self.space = 64 # image width and height
        self.level = level # current game level
        self.frame = 3
        self.prepare_boy(self.level)
        self.WIDTH = 640

    def prepare_boy(self, level):
        self.boy_object = BoyObject()
        self.boy_object_list = self.boy_object.get_object_list(level)
        self.boy_original_position = self.boy_object.get_original_position(level)
        self.x = self.boy_original_position[0]
        self.y = self.boy_original_position[1]
        self.speed = 2
        self.boy_image_sprite_right = 'Asset/bright.png'
        self.boy_image_sprite_left = 'Asset/bleft.png'
        self.boy_sprite = self.boy_image_sprite_right
        self.left = False
        self.up = False
        self.ladder = False
        self.boy_rect = Rect(self.frame * 64, 0, 64, 64)
        self.sprite_boy = GameSprite(self.boy_sprite, self.boy_rect)
        self.boy_surface = self.sprite_boy.getImage()
        self.boy_ladder_list = self.boy_object.get_object_boundary(level)
        self.boy_bottom_boundary_list = self.boy_object.get_object_bottom_boundary(level)
        self.boy_side_boundary_list = self.boy_object.get_object_side_boundary(level)
        self.initialize()

    # set the x and y direction for the player object

    def setX(self, x):

        if(self.ladder == True):
            return
        self.x += x
        if (self.up == True and x < 0):
            self.frame = 1
            self.up = False
        elif(self.up == True and x > 0):
            self.frame = 0
            self.up = False
        if(x < 0):
            self.left = True
            self.frame += 1
            if (self.frame > 5):
                self.frame = 1
            self.boy_sprite = self.boy_image_sprite_left
        elif(x > 0):
            self.frame += 1
            self.left = False
            if (self.frame > 4):
                self.frame = 0
            self.boy_sprite = self.boy_image_sprite_right
        elif(x == 0):
            if(self.left == True):
                self.frame = 2
                self.boy_sprite = self.boy_image_sprite_left
            elif(self.left == False):
                self.frame = 3
                self.boy_sprite = self.boy_image_sprite_right
        self.boy_rect = Rect(self.frame * 64, 0, 64, 64)
        self.sprite_boy = GameSprite(self.boy_sprite, self.boy_rect)
        self.boy_surface = self.sprite_boy.getImage()

    def setY(self, y):

        self.boy_rect = Rect(self.x, self.y+y, 64, 64)
        if(self.isUpDown(self.boy_rect, y) == True):
            self.y += y
        if(y == 0):
            self.frame = 9
        elif(self.up == False):
            self.frame = 6
            self.up = True
        else:
            if(y < 0):
                self.frame -= 1
            elif(y > 0):
                self.frame += 1
            if(self.frame > 10):
                self.frame = 6
            elif(self.frame < 6):
                self.frame += 2
        self.boy_sprite = self.boy_image_sprite_right
        self.boy_rect = Rect(self.frame * 64, 0, 64, 64)
        self.sprite_boy = GameSprite(self.boy_sprite, self.boy_rect)
        self.boy_surface = self.sprite_boy.getImage()

    def checkboundary(self):

        if(self.x < 0):
            self.x = 0
        elif(self.x > self.WIDTH - self.space):
            self.x = self.WIDTH - self.space
        else:
            self.isLeftRight()


    def isUpDown(self, rect, y):

        for boundary in self.boy_ladder_list:
            boundary_rect = Rect(boundary[0], boundary[1], 64, 64)
            if ((boundary_rect.collidepoint(self.x, self.y+y) == True or boundary_rect.collidepoint(self.x, self.y+self.space+y) == True) and (self.x % self.space == 0)):
                for boundary_bottom in self.boy_bottom_boundary_list:
                    boundary_rect = Rect(boundary_bottom[0], boundary_bottom[1], 64, 64)
                    if (boundary_rect.colliderect(rect) == True):
                        self.ladder = False
                        return False
                self.ladder = True
                return True
        self.ladder = False
        return False

    def isLeftRight(self):

        for boundary in self.boy_side_boundary_list:
            boundary_rect = Rect(boundary[0], boundary[1], 64, 64)
            boy_rect = Rect(self.x, self.y, 64, 64)
            if (boundary_rect.colliderect(boy_rect) == True):
                if(self.left == True):
                    self.x += self.speed
                else:
                    self.x -= self.speed

    def update(self):
        self.checkboundary()
        self.move_boy()

    def move_boy(self):
        self.draw_pos = mt.Vector2(self.x, self.y)  # the position of the image on game scene

    def initialize(self):
        for row in range(self.row):
            for column in range(self.column):

                if(self.boy_object_list[row][column] == 1):

                    self.draw_pos = mt.Vector2(self.x, self.y)  # the vector position of the image on game scene
                    self.scene.blit(self.boy_surface, self.draw_pos)  # draw enemy frame

    def draw(self):

        self.scene.blit(self.boy_surface, self.draw_pos)  # draw boy frame

With that, we will see a standstill image of the boy after the boy has stopped moving.

In the next chapter, we will explore the boy and the enemy overlapping detection mechanism. If you want to help this site please consider to donate through the below button, all your support will go to upgrading this site which will then provide you with a lot of new free code in the future, thank you in advance.

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