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「数学デッサン教室 描いて楽しむ数学のかたち」から引用した式で算出したトーラス座標をglm::rotateで回転
Twisting 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; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(3); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofColor color; for (int v = 0; v < 360; v += 10) { for (int u = 0; u < 360; u += 20) { color.setHsb(ofMap(v, 0, 360, 0, 255), 255, 230); ofSetColor(color); ofBeginShape(); ofVertex(this->make_point(300, 70, u, v)); ofVertex(this->make_point(300, 70, u + 20, v)); ofVertex(this->make_point(300, 70, u + 20, v + 10)); ofVertex(this->make_point(300, 70, u, v + 10)); ofEndShape(); } } 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; float x = (R + r * cos(u)) * cos(v); float y = (R + r * cos(u)) * sin(v); float z = r * sin(u); auto location = glm::vec3(x, y, z); auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(location.y * 0.001 + ofGetFrameNum() * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0)); location = glm::vec4(location, 0) * rotation_y; return location; } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
[ Link ]
https://github.com/junkiyoshi/Insta20190323