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ノイズ関数で求めた角度のトーラス座標を結んで上から観察。トーラス座標の式は「数学デッサン教室 描いて楽しむ数学のかたち」から引用
Distortion 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); ofSetColor(39); ofNoFill(); ofSetLineWidth(2); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); vector<glm::vec3> vertices_1; vector<glm::vec3> vertices_2; for (int i = 0; i < 3600; i += 1) { float v = i + 0.1; auto noise_point = glm::vec2(cos(v * DEG_TO_RAD), sin(v * DEG_TO_RAD)); int u_start = ofMap(ofNoise(noise_point.x, noise_point.y, ofGetFrameNum() * 0.01), 0, 1, 0, 720); vertices_1.push_back(this->make_point(250, 50, (u_start)* DEG_TO_RAD, v * DEG_TO_RAD)); vertices_2.push_back(this->make_point(250, 50, (u_start + 180) * DEG_TO_RAD, v * DEG_TO_RAD)); } ofBeginShape(); ofVertices(vertices_1); ofEndShape(true); ofBeginShape(); ofVertices(vertices_2); ofEndShape(true); 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 float x = (R + r * cos(u)) * cos(v); float y = (R + r * cos(u)) * sin(v); float z = r * sin(u); return glm::vec3(x, y, z); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |