[ Video ]
[ About ]
♪ 物理エンジンを使ったピアノ演奏
♪ Play piano by physics engine.
[ Source ]
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#pragma once #include "ofMain.h" #include "ofxBox2d.h" #include "Particle.h" #include "Obstruct.h" class ofApp : public ofBaseApp { public: void setup(); void update(); void draw(); void keyPressed(int key) {} void keyReleased(int key) {} void mouseMoved(int x, int y) {} void mouseDragged(int x, int y, int button) {} void mousePressed(int x, int y, int button) {} void mouseReleased(int x, int y, int button) {} void mouseEntered(int x, int y) {} void mouseExited(int x, int y) {} void windowResized(int w, int h) {} void dragEvent(ofDragInfo dragInfo) {} void gotMessage(ofMessage msg) {} void contactStart(ofxBox2dContactArgs &e); void contactEnd(ofxBox2dContactArgs &e); ofxBox2d box2d; vector<unique_ptr<Particle>> particles; vector<unique_ptr<Obstruct>> obstructs; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); this->box2d.init(); this->box2d.enableEvents(); this->box2d.setGravity(0, 15); this->box2d.createBounds(); this->box2d.setFPS(60); this->box2d.registerGrabbing(); ofAddListener(box2d.contactStartEvents, this, &ofApp::contactStart); ofAddListener(box2d.contactEndEvents, this, &ofApp::contactEnd); string sound_path_list[] = {"sound/pianoC.mp3", "sound/pianoD.mp3", "sound/pianoE.mp3", "sound/pianoF.mp3", "sound/pianoG.mp3", "sound/pianoA.mp3", "sound/pianoB.mp3", "sound/pianoC2.mp3"}; for (int i = 0; i < 8; i++) { unique_ptr<Obstruct> ob(new Obstruct(this->box2d, ofPoint(ofGetWidth() * 0.125 * i + ofGetWidth() * 0.0625 , ofGetHeight() * 0.50), 50, 50, i * 28)); ob->SetSound(sound_path_list[i]); this->obstructs.push_back(std::move(ob)); } } //-------------------------------------------------------------- void ofApp::update() { if (ofGetFrameNum() % 10 == 0) { ofPoint point(ofRandom(ofGetWidth()), 10); float radius = 8; unique_ptr<Particle> p(new Particle(this->box2d, point, radius)); this->particles.push_back(std::move(p)); } for (int i = this->particles.size() - 1; i >= 0; i--) { this->particles[i]->Update(); if (this->particles[i]->IsDead()) { this->particles.erase(this->particles.begin() + i); } } for (int i = 0; i < this->obstructs.size(); i++) { this->obstructs[i]->Update(); } this->box2d.update(); ofSoundUpdate(); } //-------------------------------------------------------------- void ofApp::draw() { for (int i = 0; i < this->obstructs.size(); i++) { this->obstructs[i]->Draw(); } for (int i = 0; i < this->particles.size(); i++) { this->particles[i]->Draw(); } } //-------------------------------------------------------------- void ofApp::contactStart(ofxBox2dContactArgs &e) { if (e.a != NULL && e.b != NULL) { if (e.a->GetType() == b2Shape::e_circle && e.b->GetType() == b2Shape::e_circle) { Particle* p_a = (Particle*)e.a->GetBody()->GetUserData(); Particle* p_b = (Particle*)e.b->GetBody()->GetUserData(); if (p_a != nullptr && p_b != nullptr) { // Particle Collide } return; } if (e.a->GetType() == b2Shape::e_polygon && e.b->GetType() == b2Shape::e_circle) { Obstruct* o_a = (Obstruct*)e.a->GetBody()->GetUserData(); Particle* p_b = (Particle*)e.b->GetBody()->GetUserData(); if (o_a != nullptr && p_b != nullptr) { p_b->SetColor(o_a->GetColor()); o_a->SoundPlay(); } return; } if (e.a->GetType() == b2Shape::e_circle && e.b->GetType() == b2Shape::e_polygon) { Particle* p_a = (Particle*)e.a->GetBody()->GetUserData(); Obstruct* o_b = (Obstruct*)e.b->GetBody()->GetUserData(); if (p_a != nullptr && o_b != nullptr) { p_a->SetColor(o_b->GetColor()); o_b->SoundPlay(); } return; } } } //-------------------------------------------------------------- void ofApp::contactEnd(ofxBox2dContactArgs &e) { if (e.a != NULL && e.b != NULL) { // do nothing } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
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#pragma once #include "ofMain.h" #include "ofxBox2d.h" class Obstruct { public: Obstruct(ofxBox2d& box2d, ofPoint point, float width, float height, float fue); ~Obstruct(); void Update(); void Draw(); void SoundPlay(); void SetSound(string soude_path); ofColor GetColor(); private: ofxBox2dRect* rect = nullptr; ofColor color; ofSoundPlayer sound; vector<float> waves; }; |
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#include "Obstruct.h" Obstruct::Obstruct(ofxBox2d& box2d, ofPoint point, float width, float height, float hue) { this->rect = new ofxBox2dRect(); this->rect->setPhysics(0.0, 1.0, 1.0); this->rect->setup(box2d.getWorld(), point.x , point.y, width, height); this->rect->setData(this); this->color.setHsb(hue, 255, 230); } Obstruct::~Obstruct() { if (this->rect != nullptr) { this->rect->destroy(); delete this->rect; } } void Obstruct::Update() { for (int i = this->waves.size() - 1; i >= 0; i -= 1) { this->waves[i] += 1; if (this->waves[i] > 60) { this->waves.erase(this->waves.begin() + i); } } } void Obstruct::Draw() { float width = this->rect->getWidth(); float height = this->rect->getHeight(); ofFill(); ofSetColor(this->color); ofDrawRectangle(this->rect->getPosition() + ofPoint(width * -0.5, height * -0.5) , width, height); for (int i = 0; i < this->waves.size(); i++) { ofNoFill(); ofSetColor(this->color, ofMap(this->waves[i], 0, 60, 255, 0)); float wave_width = width + waves[i]; float wave_height = height + waves[i]; ofDrawRectangle(this->rect->getPosition() + ofPoint(wave_width * -0.5, wave_height * -0.5), wave_width, wave_height); } } void Obstruct::SoundPlay() { this->sound.play(); this->waves.push_back(0); } // Setter void Obstruct::SetSound(string sound_path) { this->sound.load(sound_path); this->sound.setVolume(0.5); this->sound.setMultiPlay(true); } // Getter ofColor Obstruct::GetColor() { return this->color; } |
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#pragma once #include "ofMain.h" #include "ofxBox2d.h" class Particle { public: Particle(ofxBox2d& box2d, ofPoint point, float radius); ~Particle(); void Update(); void Draw(); void SetColor(ofColor color); ofColor GetColor(); ofPoint GetVelocity(); bool IsDead(); private: ofxBox2dCircle* circle = nullptr; ofColor color; float life; }; |
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#include "Particle.h" Particle::Particle(ofxBox2d& box2d, ofPoint point, float radius) { this->circle = new ofxBox2dCircle(); this->circle->setPhysics(1.0, 0.3, 1.0); this->circle->setup(box2d.getWorld(), point.x, point.y, radius); this->circle->setData(this); this->color = ofColor(39); this->life = 255; } Particle::~Particle() { if (this->circle != nullptr) { this->circle->destroy(); delete this->circle; } } void Particle::Update() { this->life -= 1.5; } void Particle::Draw() { ofFill(); ofSetColor(this->color, this->life > 64 ? 255 : ofMap(this->life, 0, 64, 0, 255)); ofDrawCircle(this->circle->getPosition(), this->circle->getRadius()); } // Setter void Particle::SetColor(ofColor color) { this->color = color; } // Getter ofColor Particle::GetColor() { return this->color; } ofPoint Particle::GetVelocity() { return this->circle->getVelocity(); } bool Particle::IsDead() { return this->life <= 0 ? true : false; } |