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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<ofColor> base_color_list; float theta_seed, scale_seed; vector<pair<float, float>> param_list; vector<vector<glm::vec2>> log_list; vector<ofColor> color_list; vector<float> life_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); ofNoFill(); this->theta_seed = ofRandom(1000); this->scale_seed = ofRandom(1000); ofColor color; vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c }; for (auto hex : hex_list) { color.setHex(hex); this->base_color_list.push_back(color); } } //-------------------------------------------------------------- void ofApp::update() { while (this->param_list.size() < 100) { auto deg_pair = make_pair(ofRandom(360), ofRandom(3, 20)); this->param_list.push_back(deg_pair); vector<glm::vec2> log; this->log_list.push_back(log); this->color_list.push_back(this->base_color_list[(int)ofRandom(this->base_color_list.size())]); this->life_list.push_back(ofRandom(60, 180)); } for (int i = this->param_list.size() - 1; i >= 0; i--) { this->life_list[i] -= 1; if (this->life_list[i] < 0) { this->param_list.erase(this->param_list.begin() + i); this->log_list.erase(this->log_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); continue; } auto noise_location = this->make_point(this->param_list[i].first); auto u_param = ofMap(ofNoise(glm::vec4(noise_location * 0.003, this->param_list[i].second * 0.03, this->theta_seed + ofGetFrameNum() * 0.003)), 0, 1, -0.5, 0.5); auto v_param = ofMap(ofNoise(glm::vec4(noise_location * 0.003, this->param_list[i].second * 0.03, this->scale_seed + ofGetFrameNum() * 0.008)), 0, 1, 3, 20); this->param_list[i].first += u_param; this->param_list[i].second = v_param; this->log_list[i].push_back(this->make_point(this->param_list[i].first) * this->param_list[i].second); while (this->log_list[i].size() > 100) { this->log_list[i].erase(this->log_list[i].begin()); } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (int i = 0; i < this->param_list.size(); i++) { ofSetColor(this->color_list[i]); if (this->life_list[i] > 60) { ofSetLineWidth(1.5); } else { ofSetLineWidth(ofMap(this->life_list[i], 0, 60, 0, 1.5)); } ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); } } //-------------------------------------------------------------- // 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()); } |