From 76e2dcfc6deef1cb6934d6f9219e94b51559c293 Mon Sep 17 00:00:00 2001
From: Mikko Mononen <memononen@gmail.com>
Date: Sun, 1 Apr 2012 10:07:21 +0000
Subject: [PATCH] Fix for issue 197.

---
 RecastDemo/Include/CrowdTool.h  |  2 ++
 RecastDemo/Source/CrowdTool.cpp | 10 ++++++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/RecastDemo/Include/CrowdTool.h b/RecastDemo/Include/CrowdTool.h
index b47faa8..566b82e 100644
--- a/RecastDemo/Include/CrowdTool.h
+++ b/RecastDemo/Include/CrowdTool.h
@@ -56,6 +56,8 @@ struct CrowdToolParams
 class CrowdToolState : public SampleToolState
 {
 	Sample* m_sample;
+	dtNavMesh* m_nav;
+	dtCrowd* m_crowd;
 	
 	float m_targetPos[3];
 	dtPolyRef m_targetRef;
diff --git a/RecastDemo/Source/CrowdTool.cpp b/RecastDemo/Source/CrowdTool.cpp
index 36e3591..c42b7ba 100644
--- a/RecastDemo/Source/CrowdTool.cpp
+++ b/RecastDemo/Source/CrowdTool.cpp
@@ -92,6 +92,8 @@ static void getAgentBounds(const dtCrowdAgent* ag, float* bmin, float* bmax)
 
 CrowdToolState::CrowdToolState() :
 	m_sample(0),
+	m_nav(0),
+	m_crowd(0),
 	m_targetRef(0),
 	m_run(true)
 {
@@ -142,8 +144,12 @@ void CrowdToolState::init(class Sample* sample)
 	
 	dtNavMesh* nav = m_sample->getNavMesh();
 	dtCrowd* crowd = m_sample->getCrowd();
-	if (nav && crowd && crowd->getAgentCount() == 0)
+	
+	if (nav && crowd && (m_nav != nav || m_crowd != crowd))
 	{
+		m_nav = nav;
+		m_crowd = crowd;
+	
 		crowd->init(MAX_AGENTS, m_sample->getAgentRadius(), nav);
 		
 		// Make polygons with 'disabled' flag invalid.
@@ -163,7 +169,7 @@ void CrowdToolState::init(class Sample* sample)
 		
 		// Medium (22)
 		params.velBias = 0.5f;
-		params.adaptiveDivs = 5;
+		params.adaptiveDivs = 5; 
 		params.adaptiveRings = 2;
 		params.adaptiveDepth = 2;
 		crowd->setObstacleAvoidanceParams(1, &params);