urho3d/Source/Engine/Urho2D/ConstraintMouse2D.h

//
// 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
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "Constraint2D.h"

namespace Urho3D
{

/// 2D mouse constraint component.
class URHO3D_API ConstraintMouse2D : public Constraint2D
{
    OBJECT(ConstraintMouse2D);

public:
    /// Construct.
    ConstraintMouse2D(Context* scontext);
    /// Destruct.
    virtual ~ConstraintMouse2D();
    /// Register object factory.
    static void RegisterObject(Context* context);

    /// Set target.
    void SetTarget(const Vector2& target);
    /// Set max force.
    void SetMaxForce(float maxForce);
    /// Set frequency Hz.
    void SetFrequencyHz(float frequencyHz);
    /// Set damping ratio.
    void SetDampingRatio(float dampingRatio);

    /// Return target.
    const Vector2& GetTarget() const { return target_; }
    /// Return max force.
    float GetMaxForce() const { return jointDef_.maxForce; }
    /// Return frequency Hz.
    float GetFrequencyHz() const { return jointDef_.frequencyHz; }
    /// Return damping ratio.
    float GetDampingRatio() const { return jointDef_.dampingRatio; }

private:
    /// Return joint def.
    virtual b2JointDef* GetJointDef();

    /// Box2D joint def.
    b2MouseJointDef jointDef_; 
    /// Target.
    Vector2 target_;
    /// Target setted.
    bool targetSetted_;
};

}