1 files changed, 119 insertions, 0 deletions
diff --git a/Source/external/Box2D/Collision/b2BroadPhase.cpp b/Source/external/Box2D/Collision/b2BroadPhase.cpp
new file mode 100644
index 0000000..e96339d
--- /dev/null
+++ b/Source/external/Box2D/Collision/b2BroadPhase.cpp
@@ -0,0 +1,119 @@
+/*
+* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "Box2D/Collision/b2BroadPhase.h"
+
+b2BroadPhase::b2BroadPhase()
+{
+	m_proxyCount = 0;
+
+	m_pairCapacity = 16;
+	m_pairCount = 0;
+	m_pairBuffer = (b2Pair*)b2Alloc(m_pairCapacity * sizeof(b2Pair));
+
+	m_moveCapacity = 16;
+	m_moveCount = 0;
+	m_moveBuffer = (int32*)b2Alloc(m_moveCapacity * sizeof(int32));
+}
+
+b2BroadPhase::~b2BroadPhase()
+{
+	b2Free(m_moveBuffer);
+	b2Free(m_pairBuffer);
+}
+
+int32 b2BroadPhase::CreateProxy(const b2AABB& aabb, void* userData)
+{
+	int32 proxyId = m_tree.CreateProxy(aabb, userData);
+	++m_proxyCount;
+	BufferMove(proxyId);
+	return proxyId;
+}
+
+void b2BroadPhase::DestroyProxy(int32 proxyId)
+{
+	UnBufferMove(proxyId);
+	--m_proxyCount;
+	m_tree.DestroyProxy(proxyId);
+}
+
+void b2BroadPhase::MoveProxy(int32 proxyId, const b2AABB& aabb, const b2Vec2& displacement)
+{
+	bool buffer = m_tree.MoveProxy(proxyId, aabb, displacement);
+	if (buffer)
+	{
+		BufferMove(proxyId);
+	}
+}
+
+void b2BroadPhase::TouchProxy(int32 proxyId)
+{
+	BufferMove(proxyId);
+}
+
+void b2BroadPhase::BufferMove(int32 proxyId)
+{
+	if (m_moveCount == m_moveCapacity)
+	{
+		int32* oldBuffer = m_moveBuffer;
+		m_moveCapacity *= 2;
+		m_moveBuffer = (int32*)b2Alloc(m_moveCapacity * sizeof(int32));
+		memcpy(m_moveBuffer, oldBuffer, m_moveCount * sizeof(int32));
+		b2Free(oldBuffer);
+	}
+
+	m_moveBuffer[m_moveCount] = proxyId;
+	++m_moveCount;
+}
+
+void b2BroadPhase::UnBufferMove(int32 proxyId)
+{
+	for (int32 i = 0; i < m_moveCount; ++i)
+	{
+		if (m_moveBuffer[i] == proxyId)
+		{
+			m_moveBuffer[i] = e_nullProxy;
+		}
+	}
+}
+
+// This is called from b2DynamicTree::Query when we are gathering pairs.
+bool b2BroadPhase::QueryCallback(int32 proxyId)
+{
+	// A proxy cannot form a pair with itself.
+	if (proxyId == m_queryProxyId)
+	{
+		return true;
+	}
+
+	// Grow the pair buffer as needed.
+	if (m_pairCount == m_pairCapacity)
+	{
+		b2Pair* oldBuffer = m_pairBuffer;
+		m_pairCapacity *= 2;
+		m_pairBuffer = (b2Pair*)b2Alloc(m_pairCapacity * sizeof(b2Pair));
+		memcpy(m_pairBuffer, oldBuffer, m_pairCount * sizeof(b2Pair));
+		b2Free(oldBuffer);
+	}
+
+	m_pairBuffer[m_pairCount].proxyIdA = b2Min(proxyId, m_queryProxyId);
+	m_pairBuffer[m_pairCount].proxyIdB = b2Max(proxyId, m_queryProxyId);
+	++m_pairCount;
+
+	return true;
+}