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Random walk in circle.
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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) {}; float radius; vector<glm::vec2> base_location_list; vector<ofColor> color_list; vector<vector<glm::vec2>> log_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); ofNoFill(); this->radius = 250; ofColor color; for (int deg = 0; deg < 360; deg += 1) { auto location = glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)); this->base_location_list.push_back(location); color.setHsb(ofMap((deg * 3) % 360, 0, 360, 0, 255), 255, 255); this->color_list.push_back(color); } } //-------------------------------------------------------------- void ofApp::update() { this->log_list.clear(); for (int i = 0; i < this->base_location_list.size(); i++) { vector<glm::vec2> log; log.push_back(this->base_location_list[i]); this->log_list.push_back(log); } int step = 1; for (int i = 0; i < this->log_list.size(); i++) { int k = 0; while (true) { auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.015, ofGetFrameNum() * 0.008 + k * 0.001)), 0, 1, -180, 180); auto next = this->log_list[i].back() + glm::vec2(step * cos(deg * DEG_TO_RAD), step * sin(deg * DEG_TO_RAD)); if (glm::distance(glm::vec2(0, 0), next) < this->radius) { this->log_list[i].push_back(next); } else { break; } k++; } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (int i = 0; i < this->log_list.size(); i++) { ofSetColor(this->color_list[i]); ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |