File indexing completed on 2024-04-21 14:43:25

 /*
  * box2dmousejoint.cpp
  * Copyright (c) 2011 Joonas Erkinheimo <joonas.erkinheimo@nokia.com>
  *
  * This file is part of the Box2D QML plugin.
  *
  * 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 "box2dgearjoint.h"
 #include "box2dworld.h"
 #include "box2dbody.h"
 
 Box2DGearJoint::Box2DGearJoint(QObject *parent)
     : Box2DJoint(GearJoint, parent)
     , m_joint1(0)
     , m_joint2(0)
     , m_ratio(1.0f)
 {
 }
 
 void Box2DGearJoint::setRatio(float ratio)
 {
     if (!b2IsValid(ratio)) {
         qWarning() << "GearJoint: Invalid ratio:" << ratio;
         return;
     }
     if (m_ratio == ratio)
         return;
 
     m_ratio = ratio;
     if (gearJoint())
         gearJoint()->SetRatio(ratio);
     emit ratioChanged();
 }
 
 static bool validJoint(Box2DJoint *joint)
 {
     if (!joint)
         return true;
 
     const Box2DJoint::JointType type = joint->jointType();
     return type == Box2DJoint::RevoluteJoint ||
             type == Box2DJoint::PrismaticJoint;
 }
 
 void Box2DGearJoint::setJoint1(Box2DJoint *joint1)
 {
     if (m_joint1 == joint1)
         return;
 
     if (!validJoint(joint1)) {
         qWarning() << "GearJoint.joint1: Invalid joint type";
         joint1 = 0;
     }
 
     m_joint1 = joint1;
 
     if (!joint1 || joint1->joint())
         initialize();
     else
         connect(joint1, SIGNAL(created()), this, SLOT(joint1Created()));
 
     emit joint1Changed();
 }
 
 void Box2DGearJoint::setJoint2(Box2DJoint *joint2)
 {
     if (m_joint2 == joint2)
         return;
 
     if (!validJoint(joint2)) {
         qWarning() << "GearJoint.joint2: Invalid joint type";
         joint2 = 0;
     }
 
     m_joint2 = joint2;
 
     if (!joint2 || joint2->joint())
         initialize();
     else
         connect(joint2, SIGNAL(created()), this, SLOT(joint2Created()));
 
     emit joint2Changed();
 }
 
 b2Joint *Box2DGearJoint::createJoint()
 {
     if (!m_joint1 || !m_joint2)
         return 0;
     if (!m_joint1->joint() || !m_joint2->joint())
         return 0;
 
     b2GearJointDef jointDef;
     initializeJointDef(jointDef);
 
     jointDef.joint1 = m_joint1->joint();
     jointDef.joint2 = m_joint2->joint();
     jointDef.ratio = m_ratio;
 
     return world()->world().CreateJoint(&jointDef);
 }
 
 void Box2DGearJoint::joint1Created()
 {
     disconnect(m_joint1, SIGNAL(created()), this, SLOT(joint1Created()));
     initialize();
 }
 
 void Box2DGearJoint::joint2Created()
 {
     disconnect(m_joint2, SIGNAL(created()), this, SLOT(joint2Created()));
     initialize();
 }