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輪による円。
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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) {}; 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); ofSetLineWidth(2); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(360 - 60); float R = 230; float r = 10; float u_span = 5; ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); float v_span = 0.5; for (float v_start = 0; v_start < 360; v_start += v_span) { int v_end = v_start + v_span; float span = 0.5; r = ofMap(ofNoise(cos(v_start * DEG_TO_RAD) * 100, sin(v_start * DEG_TO_RAD) * 100, ofGetFrameNum() * 0.02), 0, 1, R * -0.5, R * 0.5); for (float v = v_start; v <= v_end; v += span) { for (int u = 0; u < 360; u += u_span) { face.addVertex(this->make_point(R, r, u - u_span * 0.5, v - span * 0.5)); face.addVertex(this->make_point(R, r, u + u_span * 0.5, v - span * 0.5)); face.addVertex(this->make_point(R, r, u + u_span * 0.5, v + span * 0.5)); face.addVertex(this->make_point(R, r, u - u_span * 0.5, v + span * 0.5)); line.addVertex(this->make_point(R, r, u - u_span * 0.51, v - span * 0.51)); line.addVertex(this->make_point(R, r, u + u_span * 0.51, v - span * 0.51)); line.addVertex(this->make_point(R, r, u + u_span * 0.51, v + span * 0.51)); line.addVertex(this->make_point(R, r, u - u_span * 0.51, v + span * 0.51)); for (int i = 0; i < 4; i++) { face.addColor(ofColor(239)); line.addColor(ofColor(39)); } 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); if (v == v_start) { line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4); } if (v == v_end) { line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); } } } } face.draw(); line.drawWireframe(); this->cam.end(); /* // ffmpeg -i img_%04d.jpg aaa.mp4 int start = 300; if (ofGetFrameNum() > start) { std::ostringstream os; os << std::setw(4) << std::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()); } |
[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/13db75f9b3e81a5e4ee176cc29591aac221f4003