urho3d/Source/Engine/Urho2D/ConstraintFriction2D.cpp

//
// Copyright (c) 2008-2014 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// THE SOFTWARE.
//

#include "Precompiled.h"
#include "ConstraintFriction2D.h"
#include "Context.h"
#include "PhysicsUtils2D.h"
#include "RigidBody2D.h"

#include "DebugNew.h"

namespace Urho3D
{

extern const char* URHO2D_CATEGORY;

ConstraintFriction2D::ConstraintFriction2D(Context* context) : 
    Constraint2D(context),
    anchorPoint_(Vector2::ZERO),
    maxForce_(0.0f),
    maxTorque_(0.0f)
{

}

ConstraintFriction2D::~ConstraintFriction2D()
{
}

void ConstraintFriction2D::RegisterObject(Context* context)
{
    context->RegisterFactory<ConstraintFriction2D>(URHO2D_CATEGORY);
    
    REF_ACCESSOR_ATTRIBUTE(ConstraintFriction2D, VAR_VECTOR2, "Anchor Point", GetAnchorPoint, SetAnchorPoint, Vector2, Vector2::ZERO, AM_DEFAULT);
    ACCESSOR_ATTRIBUTE(ConstraintFriction2D, VAR_FLOAT, "Max Force", GetMaxForce, SetMaxForce, float, 0.0f, AM_DEFAULT);
    ACCESSOR_ATTRIBUTE(ConstraintFriction2D, VAR_FLOAT, "Max Torque", GetMaxTorque, SetMaxTorque, float, 0.0f, AM_DEFAULT);
    COPY_BASE_ATTRIBUTES(ConstraintFriction2D, Constraint2D);
}

void ConstraintFriction2D::SetAnchorPoint(const Vector2& anchorPoint)
{
    if (anchorPoint == anchorPoint_)
        return;

    anchorPoint_ = anchorPoint;

    RecreateJoint();
    MarkNetworkUpdate();
}

void ConstraintFriction2D::SetMaxForce(float maxForce)
{
    if (maxForce == maxForce_)
        return;

    maxForce_ = maxForce;

    RecreateJoint();
    MarkNetworkUpdate();
}


void ConstraintFriction2D::SetMaxTorque(float maxTorque)
{
    if (maxTorque == maxTorque_)
        return;

    maxTorque_ = maxTorque;

    RecreateJoint();
    MarkNetworkUpdate();
}

b2JointDef* ConstraintFriction2D::CreateJointDef()
{
    if (!ownerBody_ || !otherBody_)
        return 0;

    b2Body* bodyA = ownerBody_->GetBody();
    b2Body* bodyB = otherBody_->GetBody();
    if (!bodyA || !bodyB)
        return 0;

    b2FrictionJointDef* jointDef = new b2FrictionJointDef;
    jointDef->Initialize(bodyA, bodyB, ToB2Vec2(anchorPoint_));
    jointDef->maxForce = maxForce_;
    jointDef->maxTorque = maxTorque_;

    return jointDef;
}

}