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円上の点。
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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; vector<ofColor> color_list; ofMesh line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(239); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { 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); this->color_list.erase(this->color_list.begin() + i); } } for (int i = 0; i < 15; i++) { int random_deg = ofRandom(360); random_deg = random_deg / 5 * 5; int random_radius = 250 + ofRandom(-60, 60); random_radius = random_radius / 15 * 15; auto location = glm::vec2(random_radius * cos(random_deg * DEG_TO_RAD), random_radius * sin(random_deg * DEG_TO_RAD)); this->location_list.push_back(location); this->radius_list.push_back(1); this->speed_list.push_back(ofRandom(0.1, 0.5)); this->max_radius_list.push_back(10); this->color_list.push_back(ofColor(39)); } this->line.clear(); for (int i = 0; i < this->location_list.size(); i++) { this->line.addVertex(glm::vec3(this->location_list[i], 0)); auto alpha = this->radius_list[i] < this->max_radius_list[i] * 0.5 ? 255 : ofMap(this->radius_list[i], this->max_radius_list[i] * 0.5, this->max_radius_list[i], 255, 30); this->line.addColor(ofColor(this->color_list[i], alpha)); this->color_list[i] = ofColor(this->color_list[i], alpha); } for (int i = 0; i < this->line.getNumVertices(); i++) { for (int k = i + 1; k < this->line.getNumVertices(); k++) { auto distance = glm::distance(this->line.getVertex(i), this->line.getVertex(k)); if (distance < 40) { this->line.addIndex(i); this->line.addIndex(k); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); this->line.drawWireframe(); for (int i = 0; i < this->location_list.size(); i++) { ofSetColor(this->color_list[i]); ofNoFill(); ofDrawCircle(this->location_list[i], this->radius_list[i]); ofFill(); ofDrawCircle(this->location_list[i], 2); } /* // ffmpeg -i img_%04d.jpg aaa.mp4 int start = 100; 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/d858e37208787a0d04de6490c734622e3cf8550c