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繋がるハート。
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#pragma once #include "ofMain.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) {}; glm::vec2 make_point(float theta); ofMesh frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(0.5); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->frame.clear(); float scale = 15; for (int i = 0; i < 3; i++) { auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); for (int deg = 0; deg < 360; deg += 1) { auto location = glm::vec3(this->make_point(deg * DEG_TO_RAD) * scale, 0); location.x += ofMap(ofNoise(noise_seed.x, location.x * 0.045, ofGetFrameNum() * 0.0085), 0, 1, -30, 30); location.y += ofMap(ofNoise(noise_seed.y, location.y * 0.045, ofGetFrameNum() * 0.0085), 0, 1, -30, 30); this->frame.addVertex(location); this->frame.addColor(ofColor(255, 0, 0)); } } for (int i = 0; i < this->frame.getNumVertices(); i++) { for (int k = i + 1; k < this->frame.getNumVertices(); k++) { auto distance = glm::distance(this->frame.getVertex(i), this->frame.getVertex(k)); if (distance < 15) { this->frame.addIndex(i); this->frame.addIndex(k); } auto alpha = distance < 10 ? 255 : ofMap(distance, 10, 13, 255, 0); if (this->frame.getColor(i).a < alpha) { this->frame.setColor(i, ofColor(this->frame.getColor(i), alpha)); } if (this->frame.getColor(k).a < alpha) { this->frame.setColor(k, ofColor(this->frame.getColor(k), alpha)); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); this->frame.drawVertices(); for (int i = 0; i < this->frame.getNumVertices(); i++) { ofSetColor(this->frame.getColor(i)); ofDrawSphere(this->frame.getVertex(i), ofMap(this->frame.getColor(i).a, 0, 255, 1, 0.1)); } } //-------------------------------------------------------------- // Reference by https://twitter.com/shiffman/status/1095764239665512453 glm::vec2 ofApp::make_point(float theta) { float x = 16 * (pow(sin(theta), 3)); float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta); return glm::vec2(x, -y); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |