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尾を引くほうき星。
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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> noise_seed_list; vector<glm::vec2> location_list; vector<glm::vec2> velocity_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(1.5); for (int i = 0; i < 3; i++) { this->noise_seed_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000))); } } //-------------------------------------------------------------- void ofApp::update() { int index = 0; for (auto& noise_seed : this->noise_seed_list) { auto deg = ofGetFrameNum() * 2 + index * 120; auto next_deg = deg + 2; auto location = glm::vec2(250 * cos(deg * DEG_TO_RAD), 250 * sin(deg * DEG_TO_RAD)); auto next = glm::vec2(250 * cos(next_deg * DEG_TO_RAD), 250 * sin(next_deg * DEG_TO_RAD)); auto distance = location - next; distance *= 1; for (int i = 0; i < 2; i++) { auto future = location + distance * 8; auto random_deg = ofRandom(360); future += glm::vec2(30 * cos(random_deg * DEG_TO_RAD), 30 * sin(random_deg * DEG_TO_RAD)); auto future_distance = future - location; this->location_list.push_back(location); this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance)); } index++; } for (int i = this->location_list.size() - 1; i > -1; i--) { this->location_list[i] += this->velocity_list[i]; this->velocity_list[i] *= 1.01; if (glm::distance(glm::vec2(), this->location_list[i]) > 720) { this->location_list.erase(this->location_list.begin() + i); this->velocity_list.erase(this->velocity_list.begin() + i); } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (auto& location : this->location_list) { for (auto& other : this->location_list) { if (location == other) continue; if (glm::distance(location, other) < 50) { ofDrawLine(location, other); } } } for (auto& location : this->location_list) { ofFill(); ofSetColor(0); ofDrawCircle(location, 5); ofNoFill(); ofSetColor(255); ofDrawCircle(location, 5); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |