urho3d/Source/Engine/Urho2D/ConstraintDistance2D.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.
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// 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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#include "Precompiled.h"
#include "ConstraintDistance2D.h"
#include "Context.h"
#include "PhysicsUtils2D.h"
#include "RigidBody2D.h"

#include "DebugNew.h"

namespace Urho3D
{

extern const char* URHO2D_CATEGORY;

ConstraintDistance2D::ConstraintDistance2D(Context* context) : 
    Constraint2D(context),
    ownerBodyAnchor_(Vector2::ZERO),
    otherBodyAnchor_(Vector2::ZERO),
    frequencyHz_(0.0f),
    dampingRatio_(0.0f)
{

}

ConstraintDistance2D::~ConstraintDistance2D()
{
}

void ConstraintDistance2D::RegisterObject(Context* context)
{
    context->RegisterFactory<ConstraintDistance2D>(URHO2D_CATEGORY);
    
    REF_ACCESSOR_ATTRIBUTE(ConstraintDistance2D, VAR_VECTOR2, "Owner Body Anchor", GetOwnerBodyAnchor, SetOwnerBodyAnchor, Vector2, Vector2::ZERO, AM_DEFAULT);
    REF_ACCESSOR_ATTRIBUTE(ConstraintDistance2D, VAR_VECTOR2, "Other Body Anchor", GetOtherBodyAnchor, SetOtherBodyAnchor, Vector2, Vector2::ZERO, AM_DEFAULT);
    ACCESSOR_ATTRIBUTE(ConstraintDistance2D, VAR_FLOAT, "Frequency Hz", GetFrequencyHz, SetFrequencyHz, float, 0.0f, AM_DEFAULT);
    ACCESSOR_ATTRIBUTE(ConstraintDistance2D, VAR_FLOAT, "Damping Ratio", GetDampingRatio, SetDampingRatio, float, 0.0f, AM_DEFAULT);
    COPY_BASE_ATTRIBUTES(ConstraintDistance2D, Constraint2D);
}

void ConstraintDistance2D::SetOwnerBodyAnchor(const Vector2& anchor)
{
    if (anchor == ownerBodyAnchor_)
        return;

    ownerBodyAnchor_ = anchor;

    RecreateJoint();
    MarkNetworkUpdate();
}

void ConstraintDistance2D::SetOtherBodyAnchor(const Vector2& anchor)
{
    if (anchor == otherBodyAnchor_)
        return;

    otherBodyAnchor_ = anchor;

    RecreateJoint();
    MarkNetworkUpdate();
}

void ConstraintDistance2D::SetFrequencyHz(float frequencyHz)
{
    if (frequencyHz == frequencyHz_)
        return;

    frequencyHz_ = frequencyHz;

    RecreateJoint();
    MarkNetworkUpdate();
}

void ConstraintDistance2D::SetDampingRatio(float dampingRatio)
{
    if (dampingRatio == dampingRatio_)
        return;

    dampingRatio_ = dampingRatio;

    RecreateJoint();
    MarkNetworkUpdate();
}

b2JointDef* ConstraintDistance2D::CreateJointDef()
{
    if (!ownerBody_ || !otherBody_)
        return 0;

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

    b2DistanceJointDef* jointDef = new b2DistanceJointDef;
    jointDef->Initialize(bodyA, bodyB, ToB2Vec2(ownerBodyAnchor_), ToB2Vec2(otherBodyAnchor_));
    jointDef->frequencyHz = frequencyHz_;
    jointDef->dampingRatio = dampingRatio_;

    return jointDef;
}

}