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Clamp delta time in debugger, or other ways to control delta_time #1543

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Clamp delta time in debugger, or other ways to control delta_time #1543

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6 changes: 6 additions & 0 deletions arcade/application.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
"""
import logging
import os
import sys
import time
from typing import Tuple, Optional

Expand Down Expand Up @@ -31,6 +32,7 @@

_window: 'Window'

_in_debugger = sys.gettrace() is not None

def get_screens():
"""
Expand Down Expand Up @@ -323,6 +325,10 @@ def _dispatch_updates(self, delta_time: float):
Internal function that is scheduled with Pyglet's clock, this function gets run by the clock, and
dispatches the on_update events.
"""
# Clamp delta_time in debugger, since long debugger pauses should not
# cause sky-high `delta_time` on the next frame.
if _in_debugger:
delta_time = min(delta_time, self._update_rate * 2.)
self.dispatch_event('on_update', delta_time)

def set_update_rate(self, rate: float):
Expand Down