From 532b9c0c5021d286affea5e488a3f111037bb5a7 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Wed, 27 May 2009 01:32:18 +0000
Subject: [PATCH] replace assertion with clamping

---
 panda/src/pipeline/threadSimpleManager.cxx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/panda/src/pipeline/threadSimpleManager.cxx b/panda/src/pipeline/threadSimpleManager.cxx
index 75581be334..2e82a152fd 100644
--- a/panda/src/pipeline/threadSimpleManager.cxx
+++ b/panda/src/pipeline/threadSimpleManager.cxx
@@ -682,8 +682,11 @@ do_timeslice_accounting(ThreadSimpleImpl *thread, double now) {
       << *thread->_parent_obj << " ran for " << elapsed << " s of "
       << thread->_stop_time - thread->_start_time << " requested.\n";
   }
-    
-  nassertv(elapsed >= 0.0);
+
+  // Clamp the elapsed time at 0.  (If it's less than 0, the clock is
+  // running backwards, ick.)
+  elapsed = max(elapsed, 0.0);
+
   unsigned int ticks = (unsigned int)(elapsed * _tick_scale + 0.5);
   thread->_run_ticks += ticks;