AtomicGameEngine/Source/Atomic/Atomic2D/ConstraintWheel2D.h

//
// Copyright (c) 2008-2017 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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// THE SOFTWARE.
//

#pragma once

#include "../Atomic2D/Constraint2D.h"

namespace Atomic
{

/// 2D wheel constraint component.
class ATOMIC_API ConstraintWheel2D : public Constraint2D
{
    ATOMIC_OBJECT(ConstraintWheel2D, Constraint2D);

public:
    /// Construct.
    ConstraintWheel2D(Context* context);
    /// Destruct.
    virtual ~ConstraintWheel2D();
    /// Register object factory.
    static void RegisterObject(Context* context);

    /// Set anchor.
    void SetAnchor(const Vector2& anchor);
    /// Set axis.
    void SetAxis(const Vector2& axis);
    /// Set enable motor.
    void SetEnableMotor(bool enableMotor);
    /// Set max motor torque.
    void SetMaxMotorTorque(float maxMotorTorque);
    /// Set motor speed.
    void SetMotorSpeed(float motorSpeed);
    /// Set frequency Hz.
    void SetFrequencyHz(float frequencyHz);
    /// Set damping ratio.
    void SetDampingRatio(float dampingRatio);

    /// Return anchor.
    const Vector2& GetAnchor() const { return anchor_; }

    /// Return axis.
    const Vector2& GetAxis() const { return axis_; }

    /// Return enable motor.
    bool GetEnableMotor() const { return jointDef_.enableMotor; }

    /// Return maxMotor torque.
    float GetMaxMotorTorque() const { return jointDef_.maxMotorTorque; }

    /// Return motor speed.
    float GetMotorSpeed() const { return jointDef_.motorSpeed; }

    /// 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.
    b2WheelJointDef jointDef_;
    /// Anchor.
    Vector2 anchor_;
    /// Axis.
    Vector2 axis_;
};

}