Location of the objects that are moving

[rturus]

I have the following code. I would like to add scoring point whenever two rectangles collided with each other.
I am finding difficult to get the location of the rectangles while they are moving.

Any idea how I can do that?

Thanks,
Ronnie

import pygame
import sys
from pygame.locals import*

pygame.init()

screen=pygame.display.set_mode((600,500))
pygame.display.set_caption("Drawing Rectangle")

pos_x=300
pos_y=250
pos_z=100
pos_w=50
vel_x=2
vel_y=1


vel_m=2
vel_n=1
while True:
    for event in pygame.event.get():
        if event.type in (QUIT,KEYDOWN):
            pygame.quit()
            sys.exit()

    screen.fill((0,0,200))

    pos_x+=vel_x
    pos_y+=vel_y
    pos_z+=vel_m
    pos_w+=vel_n

    if pos_x>500 or pos_x<0:
        vel_x=-vel_x
    if pos_z>500 or pos_z<0:
            vel_m=-vel_m
    if pos_y>400 or pos_y<0:
        vel_y=-vel_y
    if pos_w>400 or pos_w<0:
        vel_n=-vel_n

    color=255,255,0
    col=150,100,150
    width=0
    pos=pos_x,pos_y,50,50
    po=pos_z,pos_w,30,30
    pygame.draw.rect(screen,color, pos,width)
    pygame.draw.rect(screen,col, po,width)

    pygame.display.update()

[nilamo]

If you use a Rect instead of just drawing a rect each frame, you can use Rect.colliderect() to handle collision detection for you (I added a clock, to make testing easier):

import pygame
import sys

pygame.init()

screen = pygame.display.set_mode((600, 500))
pygame.display.set_caption("Drawing Rectangle")

pos_x = 300
pos_y = 250
pos_z = 100
pos_w = 50
vel_x = 2
vel_y = 1


vel_m = 2
vel_n = 1

big_rect = pygame.Rect(pos_x, pos_y, 50, 50)
small_rect = pygame.Rect(pos_z, pos_w, 30, 30)

clock = pygame.time.Clock()
collided_last_frame = False
while True:
    for event in pygame.event.get():
        if event.type in (pygame.QUIT, pygame.KEYDOWN):
            pygame.quit()
            sys.exit()

    screen.fill((0, 0, 200))

    pos_x += vel_x
    pos_y += vel_y
    pos_z += vel_m
    pos_w += vel_n

    if pos_x > 500 or pos_x < 0:
        vel_x = -vel_x
    if pos_z > 500 or pos_z < 0:
        vel_m = -vel_m
    if pos_y > 400 or pos_y < 0:
        vel_y = -vel_y
    if pos_w > 400 or pos_w < 0:
        vel_n = -vel_n

    color = 255, 255, 0
    col = 150, 100, 150

    big_rect.left = pos_x
    big_rect.top = pos_y
    small_rect.left = pos_z
    small_rect.top = pos_w

    collision = big_rect.colliderect(small_rect)
    if collision and not collided_last_frame:
        print("rects collided!")
    collided_last_frame = collision

    pygame.draw.rect(screen, color, big_rect)
    pygame.draw.rect(screen, col, small_rect)

    pygame.display.update()
    clock.tick(120)