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Twisting torus and random walker.
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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; ofMesh sphere_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(2); ofEnableDepthTest(); this->sphere_list.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->sphere_list.clear(); vector<ofColor> base_color_list; ofColor color; vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c }; for (auto hex : hex_list) { color.setHex(hex); base_color_list.push_back(color); } int color_index = 0; for (int i = 0; i < 150; i++) { auto u_speed = ofRandom(1, 1.5); auto v_speed = ofRandom(1, 1.5); auto sphere_u = ofRandom(360) + ofGetFrameNum() * u_speed; auto sphere_v = ofRandom(360) + ofGetFrameNum() * v_speed; int sphere_r = ofRandom(30); this->sphere_list.addVertex(this->make_point(200, sphere_r, sphere_u, sphere_v)); this->sphere_list.addColor(base_color_list[color_index]); color_index = (color_index + 1) % base_color_list.size(); } for (int i = 0; i < this->sphere_list.getNumVertices(); i++) { for (int k = i + 1; k < this->sphere_list.getNumVertices(); k++) { if (glm::distance(this->sphere_list.getVertex(i), this->sphere_list.getVertex(k)) < 30) { this->sphere_list.addIndex(i); this->sphere_list.addIndex(k); } } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); int v_span = 1; int u_span = 60; ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (int v = 0; v <= 360; v += v_span) { bool flag = true; int u_start = ofMap(ofNoise(200 * cos(v * DEG_TO_RAD) * 0.002, 200 * sin(v * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360); int next_u = ofMap(ofNoise(200 * cos((v + v_span) * DEG_TO_RAD) * 0.002, 200 * sin((v + v_span) * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360); for (int u = u_start; u < u_start + 360; u += u_span) { if (flag) { face.addVertex(this->make_point(200, 50, u, v)); face.addVertex(this->make_point(200, 50, u + u_span, v)); face.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span)); face.addVertex(this->make_point(200, 50, next_u, v + v_span)); line.addVertex(this->make_point(200, 50, u, v)); line.addVertex(this->make_point(200, 50, u + u_span, v)); line.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span)); line.addVertex(this->make_point(200, 50, next_u, v + v_span)); ofColor color = ofColor(39); //color.setHsb(ofMap(u, u_start, u_start + 360, 0, 255), 150, 255); face.addColor(color); face.addColor(color); face.addColor(color); face.addColor(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); } next_u += u_span; flag = !flag; } } face.drawFaces(); ofSetColor(239); line.drawWireframe(); this->sphere_list.drawWireframe(); for (int i = 0; i < this->sphere_list.getNumVertices(); i++) { ofSetColor(this->sphere_list.getColor(i)); ofDrawSphere(this->sphere_list.getVertex(i), 4); } 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()); } |