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トーラスの座標をねじって遊ぶ。
Play around with twisting the coordinates of the 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; ofMesh base_face, base_line, draw_face, draw_line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(255); ofEnableDepthTest(); //ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY); this->base_line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); this->draw_line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); float phi_deg_step = 2; float theta_deg_step = 8; float R = 250; float r = R * 0.25; for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) { for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) { auto index = this->base_face.getNumVertices(); vector<glm::vec3> vertices; vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5))); this->base_face.addVertices(vertices); this->base_line.addVertices(vertices); this->base_face.addIndex(index + 0); this->base_face.addIndex(index + 1); this->base_face.addIndex(index + 3); this->base_face.addIndex(index + 0); this->base_face.addIndex(index + 3); this->base_face.addIndex(index + 2); this->base_line.addIndex(index + 0); this->base_line.addIndex(index + 1); this->base_line.addIndex(index + 1); this->base_line.addIndex(index + 3); this->base_line.addIndex(index + 0); this->base_line.addIndex(index + 2); this->base_line.addIndex(index + 2); this->base_line.addIndex(index + 3); } } } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->draw_face = this->base_face; this->draw_line = this->base_line; auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)); for (int i = 0; i < this->draw_face.getNumVertices(); i++) { auto vertex = this->draw_face.getVertex(i); auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.x + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0)); auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.y + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0)); auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.z + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1)); vertex = glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x; this->draw_face.setVertex(i, vertex); this->draw_line.setVertex(i, vertex); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofSetColor(255); this->draw_line.draw(); ofSetColor(0); this->draw_face.draw(); 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()); } |