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ねじれ円。
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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 mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; 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(25); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(2); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofPushMatrix(); ofTranslate(ofGetWindowSize() * 0.5); ofRotateZ(ofGetFrameNum() * 1.44); auto radius = 250; auto deg_start = 0; auto deg_end = deg_start + 180; auto deg_span = 4; for (int deg = deg_start; deg < deg_end; deg += deg_span) { auto center = glm::vec2(radius * cos((deg + deg_span / 2) * DEG_TO_RAD), 0); auto noise_value = ofNoise(center.x * 0.005 + ofGetFrameNum() * 0.01); auto rotate = ofMap(noise_value, 0, 1, -360, 360); ofPushMatrix(); ofTranslate(center); ofRotateX(rotate); vector<glm::vec2> vertices_1, vertices_2; for (int tmp_deg = deg; tmp_deg < deg + deg_span; tmp_deg++) { auto point = glm::vec2(radius * cos(tmp_deg * DEG_TO_RAD), radius * sin(tmp_deg * DEG_TO_RAD)); vertices_1.push_back(point - center); vertices_2.push_back(glm::vec2(point.x, -point.y) - center); } reverse(vertices_2.begin(), vertices_2.end()); ofFill(); ofSetColor(0); ofBeginShape(); ofVertices(vertices_1); ofVertices(vertices_2); ofEndShape(true); ofNoFill(); ofSetColor(255); ofBeginShape(); ofVertices(vertices_1); ofVertices(vertices_2); ofEndShape(true); ofPopMatrix(); } ofPopMatrix(); /* int start = 150; 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()); } |