I am currently making a game in python where a ball hits a group of boxes. I have loaded an image of a grass that I wanted the boxes to stand on, the grass image is 600 by 151 pixels. So far I have all the boxes and the ball appearing perfectly however, What is not working currently is when I try to load the image and display it so that the boxes can stand on the grass image instead of falling off.
import pygame
from pygame.locals import *
from pygame.color import *
import pymunk as pm
from pymunk import Vec2d
import sys
from random import randint
def to_pygame(p):
"""Small hack to convert pymunk to pygame coordinates"""
return int(p[0]), int(-p[1]+600)
def add_box(space, size, pos, mass=1.0):
# pos is a Vec2d object
points = [(-size, -size), (-size, size), (size,size), (size, -size)]
moment = pm.moment_for_poly(int(mass), points, (0,0))
body = pm.Body(mass, moment)
body.position = pos
shape = pm.Poly(body, points, (0,0))
shape.friction = 1
space.add(body,shape)
return shape
def draw_box(screen, box):
ps = box.get_points()
ps.append(ps[0])
ps = map(to_pygame, ps)
pygame.draw.polygon(screen, THECOLORS["blue"], ps, 3)
def main():
pygame.init()
screen = pygame.display.set_mode((600, 600))
pygame.display.set_caption("Piling boxes")
clock = pygame.time.Clock()
boxes = []
x = 170
y = 120
space = pm.Space()
space.gravity = (0.0, -100.0)
### ground
body = pm.Body()
shape = pm.Segment(body, (150,100), (450,100), .0)
shape.friction = 4.4
space.add(shape)
for i in range(5):
# what is the mass of the box?
mass = randint(1,3)
# what size is the box?
size = randint(10, 35)
# calculate its position & hold it in a Vec2d
#x = x + size + 10
y = y + size
pos = Vec2d(x,y)
box = add_box(space, size, pos, mass)
boxes.append(box)
while 1:
clock.tick(15)
space.step(1/30.0)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit(0)
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
sys.exit(0)
screen.fill(THECOLORS["white"])
test_image = pygame.image.load("grass.png")
screen.blit(test_image, to_pygame((450,100)), to_pygame((150,100)),3)
for i in range(len(boxes)):
draw_box(screen, boxes[i])
pygame.display.flip()
if __name__ == '__main__':
main()
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