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ノイズ・トーラス。
Noise 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 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) {}; glm::vec3 make_point(float R, float r, float u, float v); ofEasyCam cam; ofMesh face, frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetLineWidth(0.5); ofEnableDepthTest(); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->face.clear(); this->frame.clear(); float R = 250; float r = 45; int v_span = 1; int u_span = 10; for (int v = 0; v < 360; v += v_span) { auto noise_param = glm::vec2(R * cos(v * DEG_TO_RAD), R * sin(v * DEG_TO_RAD)); auto u_start = ofMap(ofNoise(noise_param.x * 0.005, noise_param.y * 0.005, ofGetFrameNum() * 0.005), 0, 1, -180, 180); for (int u = u_start; u < u_start + 360; u += 45) { 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 face_index = face.getNumVertices(); this->face.addVertices(vertices); this->face.addIndex(face_index + 0); face.addIndex(face_index + 1); face.addIndex(face_index + 2); this->face.addIndex(face_index + 0); face.addIndex(face_index + 2); face.addIndex(face_index + 3); int frame_index = frame.getNumVertices(); this->frame.addVertices(vertices); this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index + 3); this->frame.addIndex(frame_index + 3); this->frame.addIndex(frame_index + 0); } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofSetColor(39); this->face.draw(); ofSetColor(239); this->frame.drawWireframe(); 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()); } |