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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) {}; glm::vec2 make_point(float theta); vector<glm::vec2> location_list; vector<float> size_list; vector<float> speed_list; vector<float> max_size_list; vector<float> deg_list; vector<ofColor> color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetLineWidth(3); } //-------------------------------------------------------------- void ofApp::update() { for (int i = this->location_list.size() - 1; i >= 0; i--) { this->size_list[i] += this->speed_list[i]; if (this->size_list[i] > this->max_size_list[i]) { this->location_list.erase(this->location_list.begin() + i); this->size_list.erase(this->size_list.begin() + i); this->speed_list.erase(this->speed_list.begin() + i); this->max_size_list.erase(this->max_size_list.begin() + i); this->deg_list.erase(this->deg_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } } ofColor color; for (int i = 0; i < 4; i++) { auto deg = (ofGetFrameNum() * 4.32) + ofRandom(-5, 5) + (i % 2) * 180; auto scale = ofRandom(14, 16); auto location = this->make_point(deg * DEG_TO_RAD) * scale; this->location_list.push_back(location); this->size_list.push_back(1); this->speed_list.push_back(ofRandom(2, 8)); this->max_size_list.push_back(ofRandom(20, 80)); this->deg_list.push_back(ofRandom(360)); color.setHsb(ofRandom(255), 200, 230); this->color_list.push_back(color); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); ofNoFill(); for (int i = 0; i < this->location_list.size(); i++) { ofPushMatrix(); ofTranslate(this->location_list[i]); ofRotate(this->deg_list[i]); vector<glm::vec2> vertices; for (int deg = 0; deg < 360; deg += 2) { vertices.push_back(this->make_point(deg * DEG_TO_RAD) / 30 * this->size_list[i]); } auto alpha = this->size_list[i] > this->max_size_list[i] * 0.6 ? ofMap(this->size_list[i], this->max_size_list[i] * 0.6, this->max_size_list[i], 255, 0) : 255; ofNoFill(); ofSetColor(this->color_list[i], alpha); ofBeginShape(); ofVertices(vertices); ofEndShape(true); ofPopMatrix(); } /* int start = 110; if (ofGetFrameNum() > start) { ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum() - start; ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/cap/img_" + os.str() + ".jpg"); if (ofGetFrameNum() - start >= 25 * 20) { std::exit(1); } } */ } //-------------------------------------------------------------- //Reference by https://twitter.com/shiffman/status/1095764239665512453 glm::vec2 ofApp::make_point(float theta) { float x = 16 * (pow(sin(theta), 3)); float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta); return glm::vec2(x, -y); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |