qparticle.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 QPARTICLE_H
#define QPARTICLE_H
#include "qvector.h"
#include <vector>
#include <unordered_set>
#include "qaabb.h"
 
class QBody;
class QMesh;
class QParticle
{
    float r=0.5f;
 
    QVector globalPosition;
    QVector prevGlobalPosition;
 
    QVector position;
 
    float mass=1.0f;
 
    QMesh *ownerMesh=nullptr;
 
    bool isInternal=false;
 
    QVector force=QVector::Zero();
 
    std::vector<QVector> accumulatedForces;
 
    bool enabled=true;
 
    bool lazy=false; 
 
    QAABB aabb;
 
    bool aabbNeedsUpdate=true;
 
    void ClearOneTimeCollisions();
 
protected:
    std::unordered_set<QParticle*> springConnectedParticles;
 
    unordered_set<QBody*> oneTimeCollidedBodies; 
    unordered_set<QBody*> previousCollidedBodies;
 
    void ResetOneTimeCollisions();
 
    void UpdateAABB();
 
    //For Gravity-Free Feature of QArea Bodies  
    bool ignoreGravity=false;
 
    
    
 
    
public:
    QParticle();
    QParticle(float posX,float posY,float radius=0.5f);
    QParticle(QVector pos,float radius=0.5f);
 
 
 
    //Get Methods
    QVector GetGlobalPosition(){
        return globalPosition;
    }
    QVector GetPreviousGlobalPosition(){
        return prevGlobalPosition;
    }
    QVector GetPosition(){
        return position;
    }
    float GetMass(){
        return mass;
    }
    QMesh * GetOwnerMesh(){
        return ownerMesh;
    }
    float GetRadius(){
        return r;
    }
    bool GetIsInternal(){
        return isInternal;
    }
    QVector GetForce(){
        return force;
    }
    bool GetEnabled(){
        return enabled;
    }
    bool GetIsLazy(){
        return lazy;
    }
    QAABB GetAABB(){
        if(aabbNeedsUpdate==true){
            UpdateAABB();
            aabbNeedsUpdate=false;
        }
        return aabb;
    }
 
    //Set Methods
    QParticle *SetGlobalPosition(QVector value);
    QParticle *AddGlobalPosition(QVector value);
    QParticle *SetPreviousGlobalPosition(QVector value);
    QParticle *AddPreviousGlobalPosition(QVector value);
    QParticle *SetPosition(QVector value);
    QParticle *AddPosition(QVector value);
 
    QParticle *SetMass(float value);
    QParticle *SetOwnerMesh(QMesh *mesh);
    QParticle *SetRadius(float radius);
    QParticle *SetIsInternal(bool value);
 
    QParticle *SetEnabled(bool value);
 
    QParticle *SetIsLazy(bool value);
 
    //
    QParticle *ApplyForce(QVector value);
    QParticle *SetForce(QVector value);
    QParticle *AddForce(QVector value);
 
 
    //Accumulated Forces
    QParticle *AddAccumulatedForce(QVector value);
    QParticle *ClearAccumulatedForces();
    QParticle *ApplyAccumulatedForces();
 
    //Spring Connected Particles
    bool IsConnectedWithSpring(QParticle *particle);
 
 
    //Static Methods
    static void ApplyForceToParticleSegment(QParticle *pA,QParticle *pB,QVector force,QVector fromPosition);
 
    bool manualDeletion=false;
 
 
    static bool SortParticlesHorizontal(QParticle* pA,QParticle* pB){
        if(pA->GetAABB().GetMin().x==pB->GetAABB().GetMin().x){
            return pA->GetAABB().GetMax().y>pB->GetAABB().GetMax().y;
        }
        return pA->GetAABB().GetMin().x<pB->GetAABB().GetMin().x;   
    }
 
 
    friend class QMesh;
    friend class QBody;
    friend class QManifold;
    friend class QAreaBody;
    friend class QCollision;
 
    
};
 
#endif // QPARTICLE_H