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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> location_list; vector<float> radius_list; vector<float> speed_list; vector<float> max_radius_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(39); ofSetColor(255); ofNoFill(); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { int base_radius = (ofGetFrameNum() * 2) % 420 + 60; for (int i = this->location_list.size() - 1; i >= 0; i--) { this->radius_list[i] += this->speed_list[i]; if (this->radius_list[i] > this->max_radius_list[i]) { this->location_list.erase(this->location_list.begin() + i); this->radius_list.erase(this->radius_list.begin() + i); this->speed_list.erase(this->speed_list.begin() + i); this->max_radius_list.erase(this->max_radius_list.begin() + i); } } for (int i = 0; i < 30; i++) { int deg = ofGetFrameNum() + (i % 2) * 180; int radius = ofRandom(600); auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); this->location_list.push_back(location); this->radius_list.push_back(1); this->speed_list.push_back(ofRandom(0.2, 1.5)); this->max_radius_list.push_back(ofRandom(5, ofMap(radius, 0, 600, 10, 60))); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (int i = 0; i < this->location_list.size(); i++) { ofSetColor(255, ofMap(this->radius_list[i], 1, this->max_radius_list[i], 255, 30)); ofDrawCircle(this->location_list[i], this->radius_list[i]); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |