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スパイダーウェブ。
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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<glm::vec2> velocity_list; vector<float> noise_seed_list; ofMesh line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(39); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { for (int i = 0; i < 2; i++) { auto deg = ofGetFrameNum() * 2.88 + i * 180; auto location = glm::vec2(); auto next_location = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD)); for (int k = 0; k < 2; k++) { vector<glm::vec2> log; log.push_back(location); this->log_list.push_back(log); auto deg = glm::atan(next_location.y - location.y, next_location.x - location.x) * RAD_TO_DEG + 180 + ofRandom(-35, 35); 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)); } } 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) * 2; next = glm::length(next) < 1000 ? next : glm::normalize(next) * 1000; this->log_list[i].push_back(next); if (this->log_list[i].size() > 300) { 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->line.clear(); for (int i = 0; i < this->log_list.size(); i++) { this->line.addVertex(glm::vec3(this->log_list[i].back(), 0)); this->line.addColor(ofColor(255, this->log_list[i].size() < 50 ? 255 : ofMap(this->log_list[i].size(), 50, 300, 255, 0))); } 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 < 30) { this->line.addIndex(i); this->line.addIndex(k); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (int i = 0; i < this->line.getNumVertices(); i++) { ofSetColor(this->line.getColor(i)); ofDrawCircle(this->line.getVertex(i), 3); } this->line.drawWireframe(); /* int start = 300; 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()); } |