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球体の頂点を回転させた軌跡。
The locus of rotation of the vertices of a sphere.
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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) {}; ofEasyCam cam; vector<ofMeshFace> triangle_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(0); ofSetColor(255); ofSetLineWidth(1.5); ofNoFill(); ofEnableDepthTest(); auto ico_sphere = ofIcoSpherePrimitive(250, 1); this->triangle_list = ico_sphere.getMesh().getUniqueFaces(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); int log = 20; int span = 600; for (int x = -span; x <= span; x += span) { for (int y = -span; y <= span; y += span) { ofPushMatrix(); ofTranslate(x, y, 0); float noise_seed_x = ofRandom(1000); float noise_seed_y = ofRandom(1000); float noise_seed_z = ofRandom(1000); for (auto& triangle : this->triangle_list) { glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3; ofBeginShape(); for (int i = 0; i < log; i++) { auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_x, (ofGetFrameNum() + i) * 0.003), 0, 1, -PI, PI), glm::vec3(1, 0, 0)); auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_y, (ofGetFrameNum() + i) * 0.003), 0, 1, -PI, PI), glm::vec3(0, 1, 0)); auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_z, (ofGetFrameNum() + i) * 0.003), 0, 1, -PI, PI), glm::vec3(0, 0, 1)); glm::vec3 location = glm::vec4(avg, 0) * rotation_z * rotation_y * rotation_x; ofVertex(location); if (i == log - 1) { ofFill(); ofDrawSphere(location, 5); ofNoFill(); } } ofEndShape(false); } ofPopMatrix(); } } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |