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ウロボロス。
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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) {}; glm::vec3 make_point(float R, float r, float u, float v); ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(ofGetFrameNum() * 1.44); int v_span = 8; int u_span = 90; int R = 200; ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); float noise_seed = ofRandom(1000); float len = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01), 0, 1, -180, 360); for (int v = 0; v <= 360 + len; v += v_span * 1) { int u_start = ofMap(ofNoise(noise_seed, cos(v * DEG_TO_RAD) * 0.35, sin(v * DEG_TO_RAD) * 0.35, ofGetFrameNum() * 0.015), 0, 1, -360, 360); int next_u = ofMap(ofNoise(noise_seed, cos((v + v_span * 0.9) * DEG_TO_RAD) * 0.35, sin((v + v_span * 0.9) * DEG_TO_RAD) * 0.35, ofGetFrameNum() * 0.015), 0, 1, -360, 360); int r = v * 0.2; for (int u = u_start; u < u_start + 360; u += u_span) { face.addVertex(this->make_point(R, r, u, v)); face.addVertex(this->make_point(R, r, u + u_span, v)); face.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.5)); face.addVertex(this->make_point(R, r, next_u, v + v_span * 0.5)); line.addVertex(this->make_point(R, r, u, v)); line.addVertex(this->make_point(R, r, u + u_span, v)); line.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.5)); line.addVertex(this->make_point(R, r, next_u, v + v_span * 0.5)); ofColor face_color = ofColor(0); ofColor line_color = ofColor(128); face.addColor(face_color); face.addColor(face_color); face.addColor(face_color); face.addColor(face_color); line.addColor(line_color); line.addColor(line_color); line.addColor(line_color); line.addColor(line_color); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4); if (v > 0) { line.addIndex(line.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 17); } next_u += u_span; } } face.drawFaces(); line.drawWireframe(); this->cam.end(); /* int start = 16; 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); } } */ } //-------------------------------------------------------------- glm::vec3 ofApp::make_point(float R, float r, float u, float v) { // 数学デッサン教室 描いて楽しむ数学たち P.31 u *= DEG_TO_RAD; v *= DEG_TO_RAD; auto x = (R + r * cos(u)) * cos(v); auto y = (R + r * cos(u)) * sin(v); auto z = r * sin(u); return glm::vec3(x, y, z); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |