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カラー・ドーナッツ。
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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) {}; float noise_step; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->noise_step = ofRandom(1000); } //-------------------------------------------------------------- void ofApp::update() { if (ofGetFrameNum() % 50 < 30) { this->noise_step += ofMap(ofGetFrameNum() % 50, 0, 30, 0.02, 0.0001); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); auto numberOfActor = 300; auto len = 150; ofColor color; ofSeedRandom(39); for (int i = 0; i < numberOfActor; i++) { auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); color.setHsb(ofRandom(255), 255, 255, 32); for (int k = 0; k < len; k++) { auto location = glm::vec2( ofMap(ofNoise(noise_seed.x, k * 0.0005 + this->noise_step), 0, 1, -500, 500), ofMap(ofNoise(noise_seed.y, k * 0.0005 + this->noise_step), 0, 1, -500, 500)); if (glm::length(location) < 100) { location = glm::normalize(location) * 100; } if (glm::length(location) > 300) { location = glm::normalize(location) * 300; } ofSetColor(color); ofDrawCircle(location, 3); ofSetColor(255); ofDrawCircle(location, 1); } } /* int start = 300; if (ofGetFrameNum() > start) { ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum() - start; ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/cap/img_" + os.str() + ".jpg"); if (ofGetFrameNum() - start >= 25 * 20) { std::exit(1); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |