tilemap.py

import pygame as pg
from settings import * 
import pytmx

class Map:
    def __init__(self, filename):
        self.data = []
        with open(filename, 'rt') as f:
            for line in f:
                self.data.append(line.strip())

        self.tilewidth = len(self.data[0])
        self.tileheight = len(self.data)
        self.width = self.tilewidth * TILESIZE
        self.height = self.tileheight * TILESIZE


class TileMap:
    def __init__(self, filename):
        tm = pytmx.load_pygame(filename, pixelalpha=True)
        self.width = int(tm.width * tm.tilewidth)
        self.height = int(tm.height * tm.tileheight)
        self.tmxdata = tm
    
    def render(self, surface):
        ti = self.tmxdata.get_tile_image_by_gid
        for layer in self.tmxdata.visible_layers:
            if isinstance(layer, pytmx.TiledTileLayer):
                for x, y, gid in layer:
                    tile = ti(gid)
                    if tile:
                        surface.blit(tile, (x*self.tmxdata.tilewidth, y*self.tmxdata.tileheight))
    
    def make_map(self):
        temp_surface = pg.Surface((self.width, self.height))
        self.render(temp_surface)
        return temp_surface


class Camera:
    def __init__(self, width, height):
        self.camera = pg.Rect(0, 0, width, height)
        self.width = width
        self.height = height

    
    def apply(self, entity):
        return entity.rect.move(self.camera.topleft)

    def apply_rect(self, rect):
        return rect.move(self.camera.topleft)
    
    def update(self, target):
        self.x = -target.rect.centerx + int(WIDTH / 2)
        self.y = -target.rect.centery + int(HEIGHT / 2)

        self.x = min(0, self.x) #left hand side
        self.y = min(0, self.y) #top
        self.y = max(-(self.height - HEIGHT), self.y)
        self.x = max(-(self.width - WIDTH), self.x)
        self.camera = pg.Rect(self.x, self.y, self.width, self.height)