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寄り道するランダムウォーク。
Random walk with a side trip.
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#pragma once #include "ofMain.h" class Walker { public: Walker(glm::vec2 location); void update(); void draw(); private: glm::vec2 location; glm::vec2 direction; glm::vec2 rotate_location; float rotate_radius; float rotate_deg; vector<glm::vec2> log; }; 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) {}; vector<Walker> walker_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- Walker::Walker(glm::vec2 location) { this->location = location; this->direction = glm::normalize(glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1))) * 3; this->rotate_location = glm::vec2(); this->rotate_radius = 0; this->rotate_deg = 0; } //-------------------------------------------------------------- void Walker::update() { if (this->location.x > -230 && this->location.x < 230 && this->location.y > -230 && this->location.y < 230) { if (this->log.size() > 0 && ofRandom(1000) < 5) { auto prev_location = this->log.back(); auto rad = std::atan2(this->location.y - prev_location.y, this->location.x - prev_location.x); this->rotate_radius = 40; if (ofRandom(100) < 50) { this->rotate_location = this->location + glm::vec2(this->rotate_radius * cos(rad + PI * 0.5), this->rotate_radius * sin(rad + PI * 0.5)); this->rotate_deg = 270; } else { this->rotate_location = this->location + glm::vec2(this->rotate_radius * cos(rad - PI * 0.5), this->rotate_radius * sin(rad - PI * 0.5)); this->rotate_deg = 90; } } } if (this->rotate_radius < 10) { this->location += this->direction; if (this->location.x < -300 || this->location.x > 300) { this->direction *= -1; this->location += this->direction; } if (this->location.y < -300 || this->location.y > 300) { this->direction *= -1; this->location += this->direction; } } else { this->location = this->rotate_location + glm::vec2(this->rotate_radius * cos(this->rotate_deg * DEG_TO_RAD), this->rotate_radius * sin(this->rotate_deg * DEG_TO_RAD)); this->rotate_deg += 15; this->rotate_radius = this->rotate_radius <= 0 ? 0 : this->rotate_radius - 0.5; this->direction = glm::normalize(this->location - this->log.back()) * 3; if (ofRandom(100) < 1) { this->rotate_radius = 0; } } this->log.push_back(this->location); while (this->log.size() > 35){ this->log.erase(this->log.begin()); } } //-------------------------------------------------------------- void Walker::draw() { for (int i = 0; i < this->log.size() - 1; i++) { ofSetColor(ofColor(ofMap(i, 0, this->log.size(), 239, 39))); ofDrawLine(this->log[i], this->log[i + 1]); } ofFill(); ofDrawCircle(this->log.back(), 4); } //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetColor(39); ofSetLineWidth(2); for (int i = 0; i < 55; i++) { this->walker_list.push_back(Walker(glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300)))); } } //-------------------------------------------------------------- void ofApp::update() { for (auto& walker : this->walker_list) { walker.update(); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (auto& walker : this->walker_list) { walker.draw(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |