Forum_Deutsches_Museum_Interaktiv/src/particleSystem.cpp

//
//  particleSystem.cpp
//  emptyExample
//
//  Created by Sebastian Holzki on 16.04.19.
//

#include "particleSystem.hpp"




ParticleSystem::ParticleSystem(){
    
    
    
}

// -----------------------------------

ParticleSystem::~ParticleSystem(){
    
    
    
}

// -----------------------------------



void ParticleSystem::setup(){
    
    
//    xmlParticleSystems.loadFile("xml/particleSystem.xml");
 
//    this->particles.push_back(new Particle);
    
//    std::cout << "breakpoint particleSystem_1 erreicht, particleSystem_setup beendet" << std::endl;
    
}

// -----------------------------------------------

//*** PARTICLESYSTEM UPDATE *** PARTICLESYSTEM UPDATE *** PARTICLESYSTEM UPDATE *** PARTICLESYSTEM UPDATE ***


void ParticleSystem::update(float deltaT, particleMode currentMode, vector<ObjectPhysics*>* objectPhysics, vector<CheckedInVisitor*>* checkedInVisitors, float sceneWidth, float sceneHeight){
    
    
    //preparation
    
    double DELTA_T_IN_SECONDS = deltaT/1000;
   
    this->currentMode = currentMode;
    
// *** PARTICLESYSTEM SWITCH *** PARTICLESYSTEM SWITCH *** PARTICLESYSTEM SWITCH *** PARTICLESYSTEM SWITCH ***
    

    //If the particlesystem itself needs some logic, it will happen in the following switch!
 
    
    switch ( currentMode )
    {
            
            
        case PARTICLE_MODE_DEFAULT: {
            
            
            //what does the particle system do if its mode is 'PARTICLE_MODE_DEFAULT'
    
            
            // value a = xmlParticleSystems.getValue (" default:..." , 0 ) ;
            // value b = xmlParticleSystems.getValue (" default:..." , 0 ) ;
            // value c = xmlParticleSystems.getValue (" default:..." , 0 ) ;
            // value d = xmlParticleSystems.getValue (" default:..." , 0 ) ;
            // value e ....
            // ...

//            PARTICLESYSTEM_BIRTHRATE = xmlParticleSystems.getValue("default:birthrate", 0);
            
            
            
            PARTICLESYSTEM_BIRTHRATE = 1;   //testing default
            
            
            
            
            

//            std::cout << "birthrate from xml: " + ofToString(PARTICLESYSTEM_BIRTHRATE) << std::endl;
            
            break;
        }
            
//------------------------
            
        case PARTICLE_MODE_POLYMESH: {
            
            //what does the particle system do if its mode is 'PARTICLE_MODE_POLYMESH'
            
            PARTICLESYSTEM_BIRTHRATE = 0;
            updateLines(currentMode, objectPhysics);
            
            // PARTICLESYSTEM_BIRTHRATE = xmlParticleSystems.getValue("polymesh:birthrate", 0);
            int PARTICLESYSTEM_BIRTHRATE_CHECKEDINVISITORS = 4;
            
            while (PRODUCED_PER_EMITTER < PARTICLESYSTEM_BIRTHRATE_CHECKEDINVISITORS){
                
                for(int i = 0; i < checkedInVisitors->size(); i++){
                    
                    if( checkedInVisitors->at(i)->getAge() <= 7){
                        
                        this->particles.push_back(new Particle);
                        
                        particles.back()->setup(checkedInVisitors->at(i)->getBottom(), sceneHeight);
                        
                        particles.back()->setRandomVelocityOnlyGoingUp();
                        
                    }
                    
                }
                
                PRODUCED_PER_EMITTER++;
                
            }
            
            PRODUCED_PER_EMITTER = 0;
            
        break;
        }
            
//------------------------
            
        case PARTICLE_MODE_RFID: {
            
            
            //what does the particle system do if its mode is 'PARTICLE_MODE_RFID'
            
            while (PRODUCED_PER_EMITTER < PARTICLESYSTEM_BIRTHRATE){
                
                for(int i = 0; i < checkedInVisitors->size(); i++){
                    
                    if( checkedInVisitors->at(i)->getAge() <= 5){
                        
                        this->particles.push_back(new Particle);
                        
                        particles.back()->setup(checkedInVisitors->at(i)->getBottom(), sceneHeight);
                       
                            particles.back()->setRandomVelocityOnlyGoingUp();
                        
                        }
                        
                    }
                
                PRODUCED_PER_EMITTER++;
                
                }
            
            PRODUCED_PER_EMITTER = 0;
            
            
            
        
            
        break;
            
        }
            
//------------------------
            
        default: {
        
            //following two lines only help for compiling right now
            
            int a = 0;
            a++;
           
        }
            
    } //end of switch
    
// std::cout << "breakpoint particleSystem_2 erreicht, switch anweisung beendet" << std::endl;
    
    // *** BIRTH CONTROL *** BIRTH CONTROL *** BIRTH CONTROL ***
    
    //the system will emit a new particle for every emitter, as long as the PRODUCED_PER_EMITTER is smaller than the wanted BIRTHRATE
    //PPE is growing until it reaches deltaT, so the while statement will be executed more often, if deltaT gets bigger
    //as long as the birthcount grows and is lower then the birthrate (depending on the mode (XML) ) it will emit once for every emitter
    //that is active (bool emitting = true)
    
   
    
    while (PRODUCED_PER_EMITTER < PARTICLESYSTEM_BIRTHRATE){
        
        for(int i = 0; i < objectPhysics->size(); i++){
        
//            if(( (*objectPhysics).at(i)->type == "emitter" ) && (objectPhysics->at(i)->emitting == true)){
             if( objectPhysics->at(i)->emitting == true){
                
                this->particles.push_back(new Particle);

                particles.back()->setup(objectPhysics->at(i)->getPosition(), sceneHeight);
                 if(objectPhysics->at(i)->type == "emitterOnStele"){
                     particles.back()->setRandomVelocityOnlyGoingUp();
                 }else{
                    particles.back()->setRandomVelocity();
                 }
                
            }
        }
        
        PRODUCED_PER_EMITTER++;
    }
    
    PRODUCED_PER_EMITTER = 0;

    
// *** PARTICLE SYSTEM UPDATING ITS PARTICLES *** *** PARTICLE SYSTEM UPDATING ITS PARTICLES *** PARTICLE SYSTEM UPDATING ITS PARTICLES ***
    
//for "alle partikel im system" update in abhängigkeit vom übergebenen "mode"
//The following lines will start working, when Particle::update has been reworked is active and particleMode implemented

     for (int p = 0; p < particles.size(); p++){
         
         particles.at(p)->update(deltaT, currentMode, objectPhysics, checkedInVisitors, sceneWidth, sceneHeight);
     
       //Delete particles that reached maxAge
         if(currentMode != PARTICLE_MODE_POLYMESH){
             if (particles.at(p)->getAgeNorm() > 1) {
                 delete particles.at(p);
                 particles.erase(particles.begin() + p);
             }
         }
             
         
         
     }

}

// -----------------------------------------------


void ParticleSystem::draw(typeOfView activeTypeOfView){
    
    for(int i = 0; i < particles.size(); i++){
        
        particles.at(i)->draw(activeTypeOfView);

    }
    
    if( currentMode == PARTICLE_MODE_POLYMESH){
        for(int i = 0; i < lines.size(); i++){
        
            ofDrawLine(lines.at(i)->point1, lines.at(i)->point2);
        
        }
    }
    
}

// -----------------------------------------------

void ParticleSystem::updateLines(particleMode currentMode, vector<ObjectPhysics*>* objectPhysics){
    
    lines.clear();
    
    if(currentMode == PARTICLE_MODE_POLYMESH){

        for(int i = 0; i < objectPhysics->size(); i++){
    
            if(( (*objectPhysics).at(i)->type == "attraktor" ) && (objectPhysics->at(i)->attracting == true)){
       
                for(int p = 0; p < particles.size(); p++){
                    
                    if(particles.at(p)->particleIsOnGround==true){
                   
                    ofVec2f distance = particles.at(p)->getPosition() - objectPhysics->at(i)->getPosition();
           
                    if(distance.length() < 150){
                
                        lines.push_back(new Line(particles.at(p)->getPosition(), objectPhysics->at(i)->getPosition()));
                        
                          for(int p2 = 0; p2 < particles.size(); p2++){

                            ofVec2f distance = particles.at(p)->getPosition() - particles.at(p2)->getPosition();
                            
                            if(distance.length() < 50){
                                
                                lines.push_back(new Line(particles.at(p)->getPosition(), particles.at(p2)->getPosition()));
                                
                            }
                              
                              p2 += 4;      //lower value -> worse performance & nicer effect (more connections between the particles)
                        }
                    }
                    
//                  p += 2 ;   //if your system shows performance issues you might need to activate this line! (downside: effect seems to jump)
                   
                    }
                } //end of for schleife
            }
        }
    }
}