Added Box2D

2018-05-06 12:43:20 +02:00
parent cb5469bb89
commit d175d433a8
351 changed files with 123545 additions and 1 deletions
--- a/external/Box2D-2.3.1/Contributions/Enhancements/Controllers/b2Controller.cpp
+++ b/external/Box2D-2.3.1/Contributions/Enhancements/Controllers/b2Controller.cpp
@@ -0,0 +1,110 @@
+/*
+* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
+*
+* 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 "b2Controller.h"
+#include "../../Common/b2BlockAllocator.h"
+
+
+b2Controller::~b2Controller()
+{
+	//Remove attached bodies
+	Clear();
+}
+
+void b2Controller::AddBody(b2Body* body)
+{
+	void* mem = m_world->m_blockAllocator.Allocate(sizeof(b2ControllerEdge));
+	b2ControllerEdge* edge = new (mem) b2ControllerEdge;
+	
+	edge->body = body;
+	edge->controller = this;
+	
+	//Add edge to controller list
+	edge->nextBody = m_bodyList;
+	edge->prevBody = NULL;
+	if(m_bodyList)
+		m_bodyList->prevBody = edge;
+	m_bodyList = edge;
+	++m_bodyCount;
+
+	//Add edge to body list
+	edge->nextController = body->m_controllerList;
+	edge->prevController = NULL;
+	if(body->m_controllerList)
+		body->m_controllerList->prevController = edge;
+	body->m_controllerList = edge;
+}
+
+void b2Controller::RemoveBody(b2Body* body)
+{
+	//Assert that the controller is not empty
+	b2Assert(m_bodyCount>0);
+
+	//Find the corresponding edge
+	b2ControllerEdge* edge = m_bodyList;
+	while(edge && edge->body!=body)
+		edge = edge->nextBody;
+
+	//Assert that we are removing a body that is currently attached to the controller
+	b2Assert(edge!=NULL);
+
+	//Remove edge from controller list
+	if(edge->prevBody)
+		edge->prevBody->nextBody = edge->nextBody;
+	if(edge->nextBody)
+		edge->nextBody->prevBody = edge->prevBody;
+	if(edge == m_bodyList)
+		m_bodyList = edge->nextBody;
+	--m_bodyCount;
+
+	//Remove edge from body list
+	if(edge->prevController)
+		edge->prevController->nextController = edge->nextController;
+	if(edge->nextController)
+		edge->nextController->prevController = edge->prevController;
+	if(edge == body->m_controllerList)
+		body->m_controllerList = edge->nextController;
+
+	//Free the edge
+	m_world->m_blockAllocator.Free(edge, sizeof(b2ControllerEdge));
+}
+
+void b2Controller::Clear(){
+
+	while(m_bodyList)
+	{
+		b2ControllerEdge* edge = m_bodyList;
+
+		//Remove edge from controller list
+		m_bodyList = edge->nextBody;
+
+		//Remove edge from body list
+		if(edge->prevController)
+			edge->prevController->nextController = edge->nextController;
+		if(edge->nextController)
+			edge->nextController->prevController = edge->prevController;
+		if(edge == edge->body->m_controllerList)
+			edge->body->m_controllerList = edge->nextController;
+
+		//Free the edge
+		m_world->m_blockAllocator.Free(edge, sizeof(b2ControllerEdge));
+	}
+
+	m_bodyCount = 0;
+}
+