I've been noticing this quite often, but what essentially what happens is,
the sprite 'catches' and has a small stutter as it moves. At first I
thought this was a camera issue, but I have since noticed it on sprites
moving without any screen movement whatsoever.
The movement is fast, but there seems to be periods where it starts to
stutter. This can be several in a row, to constant, to every other second,
but it's there.
I have reduced the issue to a basic program:
import pyglet
window = pyglet.window.Window(800,600, vsync=False)
fps_display = pyglet.clock.ClockDisplay(color=(1,0,0,0.5))
batch = pyglet.graphics.Batch()
tileImg = pyglet.image.load("tile_test.png")
playerImg = pyglet.image.load("square.png")
group = pyglet.graphics.Group()
sprites = []
for i in xrange(50):
for j in xrange(50):
sprites.append(pyglet.sprite.Sprite(tileImg, x=i*32, y=j*32,
batch=batch))
playerSprite = pyglet.sprite.Sprite(playerImg, x=50, y=50, batch=batch)
@window.event
def on_draw():
window.clear()
batch.draw()
def moveChar(dt, axis, val):
if axis == "x":
playerSprite.update(x=playerSprite.x+val)
else:
playerSprite.update(y=playerSprite.y+val)
@window.event
def on_key_press(symbol,modifiers):
if symbol == pyglet.window.key.LEFT:
pyglet.clock.schedule_interval(moveChar, 1/60.0, "x", -1)
elif symbol == pyglet.window.key.RIGHT:
pyglet.clock.schedule_interval(moveChar, 1/60.0, "x", 1)
elif symbol == pyglet.window.key.UP:
pyglet.clock.schedule_interval(moveChar, 1/60.0, "y", 1)
elif symbol == pyglet.window.key.DOWN:
pyglet.clock.schedule_interval(moveChar, 1/60.0, "y", -1)
else:
pyglet.clock.unschedule(moveChar)
pyglet.app.run()
Can anyone test this to see if they too get an issue? I am not sure if we
are allowed to post links here but I have a simple video showcasing the
issue: http://www.mediafire.com/file/ir7f5x5gxnbgi90/sprite-stutter.mp4
(Sorry on the hosting, YT butchers the quality to where you can't see it)
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