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// particle.cpp |
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// particleSystem |
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// |
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#include "particle.h" |
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#include "ofApp.h" |
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Particle::Particle() |
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{ |
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uniqueVal = ofRandom(-10000, 10000); |
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} |
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//-------------------------------------------------------------------------------------- |
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void Particle::setup(particleMode newMode) { |
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mode = newMode; |
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age = 0.0; |
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//maxLife = 30.0; |
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frc = ofVec2f(0, 0); |
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//size = ofRandom(4.0, 0.01); |
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size = .5; |
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maxLife = 0.99; |
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mass = ofRandom(100, 250); |
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if (mode == PARTICLE_MODE_DEFAULT) { |
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effect.loadFile("xml/default.xml"); |
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int velMin = effect.getValue("default:velMin", 0); |
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int velMax = effect.getValue("default:velMax", 0); |
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int lifeMax = effect.getValue("default:maxLife", 0); |
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setVel(velMin, velMax); |
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pos.x = ofRandomWidth(); |
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pos.y = ofRandomHeight(); |
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} |
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else if (mode == PARTICLE_MODE_RADIAL) { |
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effect.loadFile("xml/radial.xml"); |
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int velMin = effect.getValue("radial:velMin", 0); |
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int velMax = effect.getValue("radial:velMax", 0); |
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setVel(velMin, velMax); |
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pos.x = ofGetWidth()/2; |
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pos.y = ofGetHeight()/2; |
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} |
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else if (mode == PARTICLE_MODE_RAIN) { |
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effect.loadFile("xml/rain.xml"); |
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vel.x = ofRandom(-40, 40); |
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vel.y = ofRandom(-40, 40); |
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pos.x = ofRandomWidth(); |
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pos.y = ofRandomHeight(); |
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drag = ofRandom(0.97, 0.99); |
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vel.y = fabs(vel.y) * 6.0; |
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} |
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else if (mode == PARTICLE_MODE_ATTRACTOR) { |
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effect.loadFile("xml/rain.xml"); |
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vel.x = ofRandom(-40, 40); |
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vel.y = ofRandom(-40, 40); |
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pos.x = ofRandomWidth(); |
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pos.y = ofRandomHeight(); |
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} |
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else if (mode == PARTICLE_MODE_DETRACTOR) { |
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effect.loadFile("xml/rain.xml"); |
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vel.x = ofRandom(-40, 40); |
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vel.y = ofRandom(-40, 40); |
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pos.x = ofRandomWidth(); |
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pos.y = ofRandomHeight(); |
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} |
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else { |
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drag = ofRandom(0.95, 0.998); |
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} |
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tex.load("img/br.png"); |
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} |
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//-------------------------------------------------------------------------------------- |
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void Particle::update(float deltaT, vector<Attractor*>* attractors,vector<Particle*> system) { |
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if (mode == PARTICLE_MODE_DEFAULT) { |
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} |
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else if (mode == PARTICLE_MODE_RAIN) { |
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float wind = ofSignedNoise(pos.x * 0.003, pos.y * 0.0006, ofGetElapsedTimef() * 0.6); |
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frc.x = wind * 0.25 + ofSignedNoise(uniqueVal, pos.y * 0.08) * 0.6; |
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frc.y = ofSignedNoise(uniqueVal, pos.x * 0.06, ofGetElapsedTimef()*0.2) * 0.09 + 0.18; |
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vel *= drag; |
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vel += frc * 0.2; |
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if (pos.y + vel.y > ofGetHeight()) { |
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pos.y -= ofGetHeight(); |
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} |
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} |
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else if (mode == PARTICLE_MODE_ATTRACTOR) { |
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ofVec2f force; |
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counterOfActiveAttractors = 0; |
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for (int i = 0; i < attractors->size(); i++) { |
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if (attractors->at(i)->getX() == 0 && attractors->at(i)->getY() == 0) { |
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vel += force; |
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vel = mass * vel.getNormalized(); |
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break; |
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} |
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counterOfActiveAttractors++; |
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force.set(attractors->at(i)->getX() - pos.x, attractors->at(i)->getY() - pos.y); |
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if (force.length() < 250) { |
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force = 40 * force.getNormalized(); |
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size = size + ofRandom(.03, 0.01); |
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vel += force; |
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vel = mass * vel.getNormalized(); |
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} |
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else { |
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force = 0 * force.getNormalized(); |
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vel += force; |
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vel = mass * vel.getNormalized(); |
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} |
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} |
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} |
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else if (mode == PARTICLE_MODE_DETRACTOR) { |
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ofVec2f force; |
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counterOfActiveAttractors = 0; |
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for (int i = 0; i < attractors->size(); i++) { |
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if (attractors->at(i)->getX() == 0 && attractors->at(i)->getY() == 0) { |
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//force = 0 * force.getNormalized(); |
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vel += force; |
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vel = mass * vel.getNormalized(); |
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break; |
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} |
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counterOfActiveAttractors++; |
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force.set(attractors->at(i)->getX() - pos.x, attractors->at(i)->getY() - pos.y); |
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if (force.length() < 600) { |
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force.normalize(); |
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size = size + ofRandom(.01, 0.01); |
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vel += -force*2000; |
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vel = mass * vel.getNormalized(); |
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} |
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else { |
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force = 0 * force.getNormalized(); |
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vel += force; |
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vel = mass * vel.getNormalized(); |
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} |
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} |
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} |
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//Update particle pos |
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age += deltaT* .5; |
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pos += (vel * deltaT); |
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// *** COLLISION *** COLLISION *** COLLISION *** COLLISION *** COLLISION *** COLLISION |
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//if (position.x <= 0 || position.x >= ofGetWidth()) { |
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//vel.x = -vel.x; |
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//position += (vel * deltaT); |
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//} |
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//else if (position.y <= 0 || position.y >= ofGetHeight()) { |
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//vel.y = -vel.y; |
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//position += (vel * deltaT); |
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//} |
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//else { |
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//position += (vel * deltaT); |
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//} |
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} |
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//-------------------------------------------------------------------------------------- |
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void Particle::draw() { |
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color.set(getAgeNorm() * 241,241/ getAgeNorm() ,219); |
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ofSetColor(color, (1 - getAgeNorm()) * 255); |
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if (mode == PARTICLE_MODE_BRUNIG) { |
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tex.setColor(color); |
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tex.draw(pos.x, pos.y, size); |
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} |
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else { |
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ofDrawCircle(pos.x, pos.y, size); |
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} |
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} |
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//------------------------------------------------------------------ |
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void Particle::setMode(particleMode newMode) { |
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mode = newMode; |
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} |
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//-------------------------------------------------------------------------------------- |
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float Particle::getAgeNorm() { |
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return age / maxLife; |
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} |
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//-------------------------------------------------------------------------------------- |
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void Particle::setVel(float min, float max) { |
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vel.x = ofRandom(min,max); |
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vel.y = ofRandom(min,max); |
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} |
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float Particle::getMaxLife() { |
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return 1; |
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} |
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float Particle::getY() { |
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return pos.y; |
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} |
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float Particle::getX() { |
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return pos.x; |
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} |
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