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内接する円。
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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) {}; float seed_value; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofNoFill(); ofSetCircleResolution(60); this->seed_value = ofRandom(1000); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(this->seed_value); } //-------------------------------------------------------------- void ofApp::draw() { int span = 120; for (int x = span * 1; x <= ofGetWindowWidth() - span * 1; x += span) { for (int y = span * 1; y <= ofGetWindowHeight() - span * 1; y += span) { auto center = glm::vec2(x, y); auto radius = span * 0.4; auto flag = ofRandom(100) < 50 ? true : false; for (int draw_radius = radius; draw_radius > 10;) { ofSetColor(239); ofDrawCircle(center, draw_radius * 0.99); flag = !flag; auto tmp_radius = draw_radius; draw_radius *= ofRandom(0.5, 0.8); auto deg = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -720, 720); auto center_radius = tmp_radius - draw_radius; center = center + glm::vec2(center_radius * cos(deg * DEG_TO_RAD), center_radius * sin(deg * DEG_TO_RAD)); } } } /* int start = 50; 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()); } |