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Ring of Torus.
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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(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { auto R = 200; auto r = 35; auto v_span = 8; auto u_span = 10; auto v = 0; this->cam.begin(); ofRotateX(300); ofColor color; for (auto deg = 0; deg < 360; deg += v_span) { color.setHsb(ofMap(deg, 0, 360, 0, 255), 255, 255); ofMesh face, frame; frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (auto u = 0; u < 360; u += u_span) { vector<glm::vec3> vertices; vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5)); vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5)); vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5)); vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5)); int index = face.getNumVertices(); face.addVertices(vertices); frame.addVertices(vertices); face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2); face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3); frame.addIndex(index + 0); frame.addIndex(index + 1); frame.addIndex(index + 1); frame.addIndex(index + 2); frame.addIndex(index + 2); frame.addIndex(index + 3); frame.addIndex(index + 3); frame.addIndex(index + 0); } ofPushMatrix(); ofRotateZ(deg); int n = 360 / v_span; int frame_number = ofGetFrameNum() * 8; int param = frame_number % (360 * n) - (v_span * n * 0.5); if (deg * n >= param && deg * n < param + v_span * n){ ofRotateY(frame_number); } else { param = (frame_number + 180 * n) % (360 * n) - (v_span * n * 0.5); if (deg * n >= param && deg * n < param + v_span * n) { ofRotateY(frame_number * -1); } } ofSetColor(239); face.drawFaces(); ofSetColor(39); frame.drawWireframe(); ofPopMatrix(); } this->cam.end(); } //-------------------------------------------------------------- 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()); } |