Try this.
import pygame
from pygame import Color, KEYDOWN
w,h=800,200
fps=60
pygame.init()
screen = pygame.display.set_mode([w, h])
color=pygame.Color("white")
clock=pygame.time.Clock()
radius=20
x,y=800,100
speedx=-4
def get_bbox(x,y):
left = x - radius + speedx
top = y - radius
width = radius * 2 + abs(speedx) * 2
height = radius * 2
return pygame.Rect((left, top), (width, height))
while True:
old_x=x
x+=speedx
screen.fill(pygame.Color("black"),get_bbox(old_x,y))
pygame.draw.circle(screen, color, (x, y), radius, 1)
get_bbox(x,y)
pygame.display.update([get_bbox(old_x,y),get_bbox(x,y)])
clock.tick(fps)
On Thu, Jun 12, 2014 at 7:32 PM, Abhas Bhattacharya <
[email protected]> wrote:
> What is also quite surprising is that the circle gets cut off in the
> same direction in which it is moving. That makes me think it cant be a
> v-sync/screen-refresh issue.
>
