[ Video ]
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円から出発して外周の四角に突き当たるまで進むランダムウォーカー。
A random walker that starts from a circle and proceeds until it hits the outer square.
[ Source ]
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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) {}; vector<glm::vec2> base_location_list; vector<vector<glm::vec2>> log_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); int radius = 100; for (float deg = 0; deg < 360; deg += 10) { auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); this->base_location_list.push_back(location); } } //-------------------------------------------------------------- void ofApp::update() { this->log_list.clear(); int limit = 300; for (int i = 0; i < this->base_location_list.size(); i++) { vector<glm::vec2> log; log.push_back(glm::vec2(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() * 0.0035, ofGetFrameNum() * 0.003 + k * 0.0005)), 0, 1, -360, 360); auto next = this->log_list[i].back() + glm::vec2(step * cos(deg * DEG_TO_RAD), step * sin(deg * DEG_TO_RAD)); if (next.x < -limit || next.x > limit || next.y < -limit || next.y > limit) { break; } else { this->log_list[i].push_back(next); } k++; } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofSetLineWidth(1.2); for (int i = 0; i < this->log_list.size(); i++) { if (this->log_list[i].size() > 1) { ofNoFill(); ofSetColor(39, 39, 239); ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); ofFill(); ofSetColor(255); ofDrawCircle(this->log_list[i].back(), 3); ofSetColor(39, 39, 239); ofDrawCircle(this->log_list[i].front(), 3); } } ofNoFill(); ofSetLineWidth(0.2); ofSetColor(255); ofDrawRectangle(-300, -300, 600, 600); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |