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群れの関係性を色付きで可視化。
Visualize relationship of flock by color.
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#pragma once #include "ofMain.h" #include "Particle.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 windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; vector<unique_ptr<Particle>> particles; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(2); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); for (int i = 0; i < 40; i++) { auto particle = make_unique<Particle>(); this->particles.push_back(move(particle)); } } //-------------------------------------------------------------- void ofApp::update() { for (auto& particle : this->particles) { particle->update(this->particles); } } //-------------------------------------------------------------- void ofApp::draw() { for (auto& particle : this->particles) { particle->draw(this->particles); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
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#pragma once #include "ofMain.h" class Particle { public: Particle(); ~Particle(); void update(vector<unique_ptr<Particle>>& particles); void draw(vector<unique_ptr<Particle>>& particles); glm::vec2 separate(vector<unique_ptr<Particle>>& particles); glm::vec2 align(vector<unique_ptr<Particle>>& particles); glm::vec2 cohesion(vector<unique_ptr<Particle>>& particles); glm::vec2 seek(glm::vec2 target); void applyForce(glm::vec2 force); private: glm::vec2 location; glm::vec2 velocity; glm::vec2 acceleration; float range; float max_force; float max_speed; int wall; ofColor color; }; |
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#include "Particle.h" //-------------------------------------------------------------- Particle::Particle() { this->location = glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())); this->velocity = glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1)); this->range = 40; this->max_force = 1; this->max_speed = 6; this->wall = 5; this->color.setHsb(ofRandom(255), 255, 255); } //-------------------------------------------------------------- Particle::~Particle() { } //-------------------------------------------------------------- void Particle::update(vector<unique_ptr<Particle>>& particles) { // 分離 glm::vec2 separate = this->separate(particles); this->applyForce(separate); // 整列 glm::vec2 align = this->align(particles); this->applyForce(align); // 結合 glm::vec2 cohesion = this->cohesion(particles); this->applyForce(cohesion); // 自我 if (glm::length(this->velocity) > 0) { glm::vec2 future = glm::normalize(this->velocity) * this->range; future += this->location; float angle = ofRandom(360); glm::vec2 target = future + glm::vec2(this->range * 0.5 * cos(angle * DEG_TO_RAD), this->range * 0.5 * sin(angle * DEG_TO_RAD)); glm::vec2 ego = this->seek(target); this->applyForce(ego); } // 境界 glm::vec2 correction; if (this->location.x < this->wall) { correction += glm::vec2(max_speed, this->velocity.y); } else if (this->location.x > ofGetWidth() - this->wall) { correction += glm::vec2(-max_speed, this->velocity.y); } if (this->location.y < this->wall) { correction += glm::vec2(this->velocity.x, max_speed); } else if (this->location.y > ofGetHeight() - this->wall) { correction += glm::vec2(this->velocity.x, -max_speed); } if (glm::length(correction) > this->max_force) { correction = glm::normalize(correction) * this->max_force; } this->applyForce(correction); // 前進 this->velocity += this->acceleration; if (glm::length(this->velocity) > this->max_speed) { this->velocity = glm::normalize(this->velocity) * this->max_speed; } this->location += this->velocity; this->acceleration *= 0; this->velocity *= 0.9; } //-------------------------------------------------------------- void Particle::draw(vector<unique_ptr<Particle>>& particles) { int radius = 20; int len = 8; int threshold = 80; ofSetColor(this->color); vector<glm::vec2> vertices_1, vertices_2; for (auto deg = 0; deg < 360; deg += 5) { vertices_1.push_back(glm::vec2(location.x + radius * cos(deg * DEG_TO_RAD), location.y + radius * sin(deg * DEG_TO_RAD))); vertices_2.push_back(glm::vec2(location.x + (radius - len) * cos(deg * DEG_TO_RAD), location.y + (radius - len) * sin(deg * DEG_TO_RAD))); } ofNoFill(); ofBeginShape(); ofVertices(vertices_1); ofEndShape(true); ofBeginShape(); ofVertices(vertices_2); ofEndShape(true); for (auto& other : particles) { if (this->location == other->location) { continue; } auto distance = glm::distance(location, other->location); if (distance < threshold) { auto direction_rad = std::atan2(other->location.y - location.y, other->location.x - location.x); auto direction = direction_rad * RAD_TO_DEG; auto width = ofMap(distance, radius, threshold, 360, 0); vector<glm::vec2> in, out; for (auto deg = direction - width * 0.5; deg <= direction + width * 0.5; deg++) { in.push_back(glm::vec2(location.x + (radius - len) *cos(deg * DEG_TO_RAD), location.y + (radius - len) * sin(deg * DEG_TO_RAD))); out.push_back(glm::vec2(location.x + radius * cos(deg * DEG_TO_RAD), location.y + radius * sin(deg * DEG_TO_RAD))); } reverse(out.begin(), out.end()); ofFill(); ofBeginShape(); ofVertices(in); ofVertices(out); ofEndShape(); ofDrawLine(location + glm::vec2(radius * cos(direction * DEG_TO_RAD), radius * sin(direction * DEG_TO_RAD)), other->location + glm::vec2(radius * cos((180 + direction) * DEG_TO_RAD), radius * sin((180 + direction) * DEG_TO_RAD))); } } } //-------------------------------------------------------------- glm::vec2 Particle::separate(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += glm::normalize(difference); count++; } } if (count > 0) { glm::vec2 avg = sum / count; avg = avg * this->max_speed; if (glm::length(avg) > this->max_speed) { avg = glm::normalize(avg) * this->max_speed; } glm::vec2 steer = avg - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } result = steer; } return result; } //-------------------------------------------------------------- glm::vec2 Particle::align(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += other->velocity; count++; } } if (count > 0) { glm::vec2 avg = sum / count; avg = avg * this->max_speed; if (glm::length(avg) > this->max_speed) { avg = glm::normalize(avg) * this->max_speed; } glm::vec2 steer = avg - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } result = steer; } return result; } //-------------------------------------------------------------- glm::vec2 Particle::cohesion(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range * 0.5; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += other->location; count++; } } if (count > 0) { result = this->seek(sum / count); } return result; } //-------------------------------------------------------------- glm::vec2 Particle::seek(glm::vec2 target) { glm::vec2 desired = target - this->location; float distance = glm::length(desired); desired = glm::normalize(desired); desired *= distance < this->range ? ofMap(distance, 0, this->range, 0, this->max_speed) : max_speed; glm::vec2 steer = desired - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } return steer; } //-------------------------------------------------------------- void Particle::applyForce(glm::vec2 force) { this->acceleration += force; } |