tilemap.py

import pygame as pg
import pytmx
from settings import *

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 TiledMap:
    def __init__(self, filename):
        tm = pytmx.load_pygame(filename, pixelalpha=True)
        self.width = tm.width*tm.tilewidth
        self.height = 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):
        x = -target.rect.x + int(WIDTH/2)
        y = -target.rect.y + int(HEIGHT/2)

        # limit scrolling to map size, remove to extend map with water
        x = min(0,x)
        y = min(0,y)
        x = max(-(self.width - WIDTH), x)
        y  = max(-(self.height - HEIGHT), y)

        self.camera = pg.Rect(x, y, self.width, self.height)