lattice.py

import pygame
import random

BLACK = (0,0,0)

pygame.init()
WIDTH = 450
HEIGHT = 600
screen = pygame.display.set_mode([WIDTH, HEIGHT])

another_loop = True
clock = pygame.time.Clock()

#Assumes an image names bwclear1.gif is in the current directory
lsprite = pygame.image.load("bwclear1.gif") #load an image (blit it onto screen later)
rsprite = pygame.transform.flip(lsprite, True, False) #this is a right facing copy

sprite = lsprite #this variable will store the current directioned version

wx = 100
wy = 100
scale = 1.0 #I'm going to also allow scaling up and down
wiz_w, wiz_h = lsprite.get_size() #We can get the original dimensions this way
game_x = 1
game_y = 1
class Wizard:
    def __init__(self):
        self.game_x = 0
        self.game_y = 0
        self.pix_x = 20
        self.pix_y = 20
        self.speed = 2
        self.x_speed = 0
        self.y_speed = 0
        self.image = rsprite
    def game_xy_to_pixel_xy(self):
        return (20 + self.game_x*100, 20 + self.game_y*100)
    def move_down(self, amount):
        if amount != 0:
            self.y_speed = 2
        self.game_y += amount
    def move_right(self, amount):
        if amount != 0:
            self.x_speed = 2
        if amount > 0:
            self.image = rsprite
        elif amount < 0:
            self.image = lsprite
        self.game_x += amount
    def update(self):
        target = self.game_xy_to_pixel_xy()
        if target == (self.pix_x, self.pix_y):
            self.x_speed = 0
            self.y_speed = 0
        else:
            if target[0] > self.pix_x:
                self.pix_x += 2
            else:
                self.pix_x -= 2
            if target[1] > self.pix_y:
                self.pix_y += 2
            else:
                self.pix_y -= 2
    def draw(self):
        screen.blit(self.image, (self.pix_x, self.pix_y))

character = Wizard()  
while another_loop:
    # --- Basic Event Processing
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            another_loop = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                character.move_right(1)
            elif event.key == pygame.K_DOWN:
                character.move_down(1)
            elif event.key == pygame.K_LEFT:
                character.move_right(-1)
            elif event.key == pygame.K_UP:
                character.move_down(-1)
    # Every loop we will wipe the screen and redraw images
    screen.fill(BLACK)
    character.update()
    character.draw()

    #This sets the frames per second
    clock.tick(60)
 
    #This puts the new stuff you've drawn on screen
    pygame.display.flip()

#When we've left the while loop exit pygame 
pygame.quit()