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グラデーションの円。
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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(0); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); auto radius_span = 20; auto len = 600; ofColor color; ofSeedRandom(39); for (int radius = 60; radius <= 320; radius += radius_span) { auto noise_seed = ofRandom(1000); for (int i = 0; i < len; i++) { auto deg = ofMap(ofNoise(noise_seed, i * 0.00035 - ofGetFrameNum() * 0.0025), 0, 1, -360, 360); auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); ofNoFill(); ofSetColor(255); ofDrawCircle(location, radius_span * 0.3 + 1); } } ofSeedRandom(39); for (int radius = 60; radius <= 320; radius += radius_span) { auto noise_seed = ofRandom(1000); auto hue = ofMap(radius, 60, 320, 0, 255); for (int i = 0; i < len; i++) { auto deg = ofMap(ofNoise(noise_seed, i * 0.00035 - ofGetFrameNum() * 0.0025), 0, 1, -360, 360); auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); color.setHsb((int)(hue + i * 0.1) % 255, 200, 255); ofFill(); ofSetColor(color); ofDrawCircle(location, radius_span * 0.3); } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |