From 42b2b2d254e2f308ed6e8122248c12a95eba07d5 Mon Sep 17 00:00:00 2001
From: Josh Wilson <hatjosh@users.sourceforge.net>
Date: Thu, 20 Jul 2006 15:25:02 +0000
Subject: [PATCH] accelerate only on postive dt

---
 direct/src/particles/Particles.py | 32 ++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/direct/src/particles/Particles.py b/direct/src/particles/Particles.py
index 14cfb0e869..8d0f4b63b1 100644
--- a/direct/src/particles/Particles.py
+++ b/direct/src/particles/Particles.py
@@ -564,19 +564,21 @@ class Particles(ParticleSystem):
             
 
     def accelerate(self,time,stepCount = 1,stepTime=0.0):
-        if stepTime == 0.0:
-            stepTime = float(time)/stepCount
-            remainder = 0.0
-        else:
-            stepCount = int(float(time)/stepTime)
-            remainder = time-stepCount*stepTime
-
-        for step in range(stepCount):
-            self.update(stepTime)
-            base.physicsMgr.doPhysics(stepTime,self)
-
-        if(remainder):
-            self.update(remainder)
-            base.physicsMgr.doPhysics(remainder,self)
-
+        if time > 0.0:
+            if stepTime == 0.0:
+                stepTime = float(time)/stepCount
+                remainder = 0.0
+            else:
+                stepCount = int(float(time)/stepTime)
+                remainder = time-stepCount*stepTime
+                
+            for step in range(stepCount):
+                base.particleMgr.doParticles(stepTime,self,False)
+                base.physicsMgr.doPhysics(stepTime,self)
+                
+            if(remainder):
+                base.particleMgr.doParticles(remainder,self,False)
+                base.physicsMgr.doPhysics(remainder,self)
+                
+            self.render()