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近くのパーティクルを結んで多角形を描く
Near particles.
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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> locations; vector<glm::vec2> bases; vector<glm::vec2> directions; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); } //-------------------------------------------------------------- void ofApp::update() { for (int i = this->locations.size() - 1; i >= 0; i--) { this->locations[i] += this->directions[i]; if (glm::distance(this->bases[i], this->locations[i]) > 100) { this->locations.erase(this->locations.begin() + i); this->bases.erase(this->bases.begin() + i); this->directions.erase(this->directions.begin() + i); } } for (int x = -240; x <= 240; x += 240) { for (int y = -240; y <= 240; y += 240) { if (ofRandom(100) < 40) { auto direction = glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1)); direction = glm::normalize(direction) * ofRandom(1, 3); this->locations.push_back(glm::vec2(x, y)); this->bases.push_back(glm::vec2(x, y)); this->directions.push_back(direction); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (auto& location : this->locations) { vector<glm::vec2> near_location; ofSetColor(255); ofDrawCircle(location, 3); for (auto& other : this->locations) { if (location == other) { continue; } float distance = glm::distance(location, other); if (distance < 50) { near_location.push_back(other); } } if (near_location.size() > 3) { ofSetColor(255, 128); ofBeginShape(); ofVertices(near_location); ofEndShape(true); } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |