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ほどける円。
unraveling circle.
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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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(3); ofNoFill(); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); vector<ofColor> color_list = {ofColor(255, 0, 0), ofColor(0, 255, 0), ofColor(0, 0, 255)}; for (int i = 0; i < 2; i++) { auto radius = 125 + i * 125; auto rotate_deg = (ofGetFrameNum() + i * 180) % 360; auto rotate_location = glm::vec2(radius * cos(rotate_deg * DEG_TO_RAD), radius * sin(rotate_deg * DEG_TO_RAD)); for (int k = 0; k < color_list.size(); k++) { auto noise_seed = ofRandom(1000); ofSetColor(color_list[k]); ofBeginShape(); for (int deg = 0; deg < 360; deg += 1) { auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); auto distance = glm::distance(location, rotate_location); if (distance < radius * 0.75) { auto noise_radius = ofMap(ofNoise(noise_seed, location.x * 0.035, location.y * 0.035, ofGetFrameNum() * 0.005), 0, 1, radius - 125, radius + 125); auto noise_location = glm::vec2(noise_radius * cos(deg * DEG_TO_RAD), noise_radius * sin(deg * DEG_TO_RAD)); auto gap = location - noise_location; ofVertex(location + gap * ofMap(distance, 0, radius * 0.75, 1, 0)); } else { ofVertex(location); } } ofEndShape(true); } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |