qareabody.h

 
/************************************************************************************
 * MIT License
 *
 * Copyright (c) 2023 Eray Zesen
 *
 * 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
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * https://github.com/erayzesen/QuarkPhysics
 *
**************************************************************************************/
#ifndef QAREABODY_H
#define QAREABODY_H
#include "qbody.h"
#include "qworld.h"
#include <functional>
#include <unordered_set>
 
class QManifold;
class QAreaBody : public QBody{
    unordered_set<QBody*> bodies;
    void AddCollidedBody(QBody *body);
    void CheckBodies();
    bool gravityFree=false;
    QVector linearForceToApply=QVector::Zero();
public:
    QAreaBody();
    virtual void OnCollisionEnter(QBody *collidedBody){};
    virtual void OnCollisionExit(QBody *collidedBody){};
    std::function<void(QAreaBody *areaBody,QBody* collidedBody)> CollisionEnterEventListener;
    std::function<void(QAreaBody *areaBody,QBody* collidedBody)> CollisionExitEventListener;
 
    std::function<QVector(QBody *body)> ComputeLinearForceListener;
 
    bool GetGravityFreeEnabled(){
        return gravityFree;
    }
    QVector GetLinearForceToApply(){
        return linearForceToApply;
    }
 
    QAreaBody* SetGravityFreeEnabled(bool value){
        gravityFree=value;
        for (auto body : bodies){
            body->ignoreGravity=gravityFree;
        }
        return this;
    }
    QAreaBody* SetLinearForceToApply(QVector value){
        linearForceToApply=value;
        return this;
    }
 
    vector<QBody*> GetBodies() const{
        return vector<QBody*>(bodies.begin(),bodies.end() ); 
    }
 
    virtual QVector ComputeLinearForce(QBody* body){
 
        if(ComputeLinearForceListener!=nullptr) {
            return ComputeLinearForceListener(body);
        }
        return linearForceToApply;
    }
    bool HasBody(QBody* body){
        return bodies.find(body) != bodies.end();
    }
 
 
    friend class QManifold;
    friend class QWorld;
 
};
 
 
#endif //QAREABODY_H