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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<float> x_list; vector<float> y_list; vector<float> speed_list; vector<vector<glm::vec2>> log_list; vector<glm::vec2> velocity_list; vector<float> noise_seed_list; vector<ofColor> color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(239); ofFill(); for (int i = 0; i < 12; i++) { this->x_list.push_back(ofRandom(ofGetWindowWidth())); this->y_list.push_back(ofRandom(ofGetWindowHeight())); this->speed_list.push_back(ofRandom(10, 25)); } ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER); } //-------------------------------------------------------------- void ofApp::update() { ofColor color; for (int i = 0; i < this->x_list.size(); i++) { auto y = (int)(this->y_list[i] + ofGetFrameNum() * this->speed_list[i]) % 800 - 50; auto noise_location = glm::vec2(this->x_list[i], y); auto next_noise_location = glm::vec2(this->x_list[i], y - 1); for (int k = 0; k < 1; k++) { vector<glm::vec2> log; log.push_back(noise_location); this->log_list.push_back(log); auto deg = glm::atan(next_noise_location.y - noise_location.y, next_noise_location.x - noise_location.x) * RAD_TO_DEG + 180 + ofRandom(-30, 30); glm::vec2 velocity = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD)); this->velocity_list.push_back(velocity); this->noise_seed_list.push_back(ofRandom(1000)); color.setHsb(ofRandom(255), 200, 255); this->color_list.push_back(color); } } for (int i = 0; i < this->log_list.size(); i++) { auto future = this->velocity_list[i] * 200; auto random_deg = ofMap(ofNoise(glm::vec2(this->noise_seed_list[i], ofGetFrameNum() * 0.01)), 0, 1, 0, 360); future += glm::vec2(50 * cos(random_deg * DEG_TO_RAD), 50 * sin(random_deg * DEG_TO_RAD)); auto next = this->log_list[i].back() + glm::normalize(future) * 4; this->log_list[i].push_back(next); if (this->log_list[i].size() > 30) { this->log_list.erase(this->log_list.begin() + i); this->velocity_list.erase(this->velocity_list.begin() + i); this->noise_seed_list.erase(this->noise_seed_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } } } //-------------------------------------------------------------- void ofApp::draw() { for (int i = 0; i < this->log_list.size(); i++) { ofPushMatrix(); ofTranslate(this->log_list[i].back()); auto rad = atan2(this->velocity_list[i].y, this->velocity_list[i].x); ofRotate(rad * RAD_TO_DEG + ofGetFrameNum() * 3); ofSetColor(this->color_list[i]); auto size = this->log_list[i].size() < 3 ? 30 : ofMap(this->log_list[i].size(), 3, 30, 30, 1); ofDrawRectangle(glm::vec3(), size, size); ofPopMatrix(); } for (int i = 0; i < this->log_list.size(); i++) { ofPushMatrix(); ofTranslate(this->log_list[i].back()); auto rad = atan2(this->velocity_list[i].y, this->velocity_list[i].x); ofRotate(rad * RAD_TO_DEG + ofGetFrameNum() * 3); ofSetColor(39); auto size = this->log_list[i].size() < 3 ? 23 : ofMap(this->log_list[i].size(), 3, 30, 23, 0); ofDrawRectangle(glm::vec3(), size, size); ofPopMatrix(); } /* int start = 50; 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); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |