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二色、多くの線。
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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<vector<glm::vec2>> log_list; vector<ofColor> color_list; vector<float> life_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT); ofNoFill(); } //-------------------------------------------------------------- void ofApp::update() { ofColor color; for (int i = 0; i < 20; i++) { auto deg = ofRandom(360); auto start_radius = ofRandom(2) < 1 ? 190 : 310; auto location = glm::vec2(start_radius * cos(deg * DEG_TO_RAD), start_radius * sin(deg * DEG_TO_RAD)); color.setHsb(start_radius == 190 ? 0 : 128, 255, 255); vector<glm::vec2> log; log.push_back(location); this->log_list.push_back(log); this->color_list.push_back(color); this->life_list.push_back(ofRandom(100, 150)); } int radius = 4; for (int i = this->log_list.size() - 1; i >= 0; i--) { this->life_list[i] -= 1; if (this->life_list[i] < 0) { 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; } int count = 0; while (true) { auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.01, count * 0.01 + ofGetFrameNum() * 0.01)), 0, 1, -360, 360); auto tmp = this->log_list[i].back() + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); if (glm::length(tmp) > 190 && glm::length(tmp) < 310) { this->log_list[i].push_back(this->log_list[i].back() + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); break; } else { count++; } } while (this->log_list[i].size() > 600) { this->log_list[i].erase(this->log_list[i].begin()); } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofRotateZ(90); for (int i = 0; i < this->log_list.size(); i++) { if (this->life_list[i] > 80) { ofSetColor(this->color_list[i]); ofSetLineWidth(2); } else { ofSetColor(ofColor(this->color_list[i], ofMap(this->life_list[i], 0, 80, 0, 255))); ofSetLineWidth(ofMap(this->life_list[i], 0, 80, 0, 2)); } ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); } /* // ffmpeg -i img_%04d.jpg aaa.mp4 int start = 500; if (ofGetFrameNum() > start) { std::ostringstream os; os << std::setw(4) << std::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()); } |
[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/a0f1ffbb14fb0b0b5b737393d54284233527b7ef