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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(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->frame.clear(); float scale = 18; ofColor color; for (int i = 0; i < 1; 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 * 0.5, ofGetFrameNum() * 0.0085), 0, 1, -30, 30); location.y += ofMap(ofNoise(noise_seed.y, location.y * 0.5, ofGetFrameNum() * 0.0085), 0, 1, -30, 30); this->frame.addVertex(location); color.setHsb(ofRandom(255), 255, 255); this->frame.addColor(color); } } 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); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5 + glm::vec2(0, -30)); this->frame.drawVertices(); for (int i = 0; i < this->frame.getNumVertices(); i++) { ofPushMatrix(); ofTranslate(this->frame.getVertex(i)); ofRotate(ofRandom(360)); auto scale = ofRandom(0.5, 1.5); ofFill(); ofSetColor(this->frame.getColor(i), 92); ofBeginShape(); for (int deg = 0; deg < 360; deg += 2) { ofVertex(this->make_point(deg * DEG_TO_RAD) * scale); } ofEndShape(true); ofNoFill(); ofSetColor(this->frame.getColor(i)); ofBeginShape(); for (int deg = 0; deg < 360; deg += 2) { ofVertex(this->make_point(deg * DEG_TO_RAD) * scale); } ofEndShape(true); ofPopMatrix(); } } //-------------------------------------------------------------- // 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()); } |