So I've programmed a small platform game in pygame, where you can place blocks and jump around on them in stuff.. but, the game is confined to the border of the window (obviously). So how could I add a method of scrolling a "camera" with the A and D keys?
Here is the code for the game:
import pygame,random
from pygame.locals import *
from collections import namedtuple
pygame.init()
clock=pygame.time.Clock()
screen=pygame.display.set_mode((640,480))
pygame.display.set_caption("PiBlocks | By Sam Tubb")
max_gravity = 100
blocksel="texture\\dirt.png"
curs = pygame.image.load("texture\\cursor.png").convert()
curs.set_colorkey((0,255,0))
class Block(object):
def __init__(self,x,y,sprite):
self.sprite = pygame.image.load(sprite).convert_alpha()
self.rect = self.sprite.get_rect(centery=y, centerx=x)
class Player(object):
sprite = pygame.image.load("texture\\playr.png").convert()
sprite.set_colorkey((0,255,0))
def __init__(self, x, y):
self.rect = self.sprite.get_rect(centery=y, centerx=x)
# indicates that we are standing on the ground
# and thus are "allowed" to jump
self.on_ground = True
self.xvel = 0
self.yvel = 0
self.jump_speed = 7
self.move_speed = 3
def update(self, move, blocks):
# check if we can jump
if move.up and self.on_ground:
self.yvel -= self.jump_speed
# simple left/right movement
if move.left: self.xvel = -self.move_speed
if move.right: self.xvel = self.move_speed
# if in the air, fall down
if not self.on_ground:
self.yvel += 0.3
# but not too fast
if self.yvel > max_gravity: self.yvel = max_gravity
# if no left/right movement, x speed is 0, of course
if not (move.left or move.right):
self.xvel = 0
# move horizontal, and check for horizontal collisions
self.rect.left += self.xvel
self.collide(self.xvel, 0, blocks)
# move vertically, and check for vertical collisions
self.rect.top += self.yvel
self.on_ground = False;
self.collide(0, self.yvel, blocks)
def collide(self, xvel, yvel, blocks):
# all blocks that we collide with
for block in [blocks[i] for i in self.rect.collidelistall(blocks)]:
# if xvel is > 0, we know our right side bumped
# into the left side of a block etc.
if xvel > 0: self.rect.right = block.rect.left
if xvel < 0: self.rect.left = block.rect.right
# if yvel > 0, we are falling, so if a collision happpens
# we know we hit the ground (remember, we seperated checking for
# horizontal and vertical collision, so if yvel != 0, xvel is 0)
if yvel > 0:
self.rect.bottom = block.rect.top
self.on_ground = True
self.yvel = 0
# if yvel < 0 and a collision occurs, we bumped our head
# on a block above us
if yvel < 0: self.rect.top = block.rect.bottom
colliding = False
Move = namedtuple('Move', ['up', 'left', 'right'])
player=[]
blocklist=[]
font=pygame.font.Font(None,20)
while True:
screen.fill((25,30,90))
mse = pygame.mouse.get_pos()
key = pygame.key.get_pressed()
if key[K_1]:
blocksel="texture\\dirt.png"
if key[K_2]:
blocksel="texture\\stonetile.png"
if key[K_3]:
blocksel="texture\\sand.png"
if key[K_ESCAPE]:
exit()
for event in pygame.event.get():
if event.type == QUIT:
exit()
if key[K_LSHIFT]:
if event.type==MOUSEMOTION:
if not any(block.rect.collidepoint(mse) for block in blocklist):
x=(int(mse[0]) / 32)*32
y=(int(mse[1]) / 32)*32
blocklist.append(Block(x+16,y+16,blocksel))
else:
if event.type == pygame.MOUSEBUTTONUP:
if event.button == 1:
to_remove = [b for b in blocklist if b.rect.collidepoint(mse)]
for b in to_remove:
blocklist.remove(b)
if not to_remove:
x=(int(mse[0]) / 32)*32
y=(int(mse[1]) / 32)*32
blocklist.append(Block(x+16,y+16,blocksel))
elif event.button == 3:
x=(int(mse[0]) / 32)*32
y=(int(mse[1]) / 32)*32
player=Player(x+16,y+16)
move = Move(key[K_UP], key[K_LEFT], key[K_RIGHT])
for b in blocklist:
screen.blit(b.sprite, b.rect)
if player:
player.update(move, blocklist)
screen.blit(player.sprite, player.rect)
x=(int(mse[0]) / 32)*32
y=(int(mse[1]) / 32)*32
screen.blit(curs,(x,y))
clock.tick(60)
x=blocksel.replace('texture\\','')
x=x.replace('.png','')
words=font.render('Selected Block: '+str(x), True, (255,255,255))
screen.blit(words,(1,1))
pygame.display.flip()
Any help is appreciated :)
