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中間点に円を描く。
Draw circle on center.
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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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(255); ofSetColor(0); ofSetLineWidth(2); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); vector<glm::vec2> location_list; for (int i = 0; i < 80; i++) { auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0015), 0, 1, -500, 500), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0015), 0, 1, -500, 500)); location_list.push_back(location); } for (int i = 0; i < location_list.size(); i++) { ofFill(); ofDrawCircle(location_list[i], 8); for (int k = i + 1; k < location_list.size(); k++) { auto distance = glm::distance(location_list[i], location_list[k]); if (distance < 100) { auto center = location_list[i] + ((location_list[k] - location_list[i]) / 2); auto i_center = location_list[i] + ((location_list[k] - location_list[i]) / 2) * (distance - 12) / distance; auto k_center = location_list[k] + ((location_list[i] - location_list[k]) / 2) * (distance - 12) / distance;; ofDrawLine(location_list[i], i_center); auto rad_start = std::atan2(location_list[i].y - location_list[k].y, location_list[i].x - location_list[k].x) - PI * 0.5; ofNoFill(); ofBeginShape(); for (auto rad = rad_start; rad < rad_start + PI; rad += PI / 180) { ofVertex(center + glm::vec2(6 * cos(rad), 6 * sin(rad))); } ofEndShape(); ofDrawLine(location_list[k], k_center); rad_start = std::atan2(location_list[k].y - location_list[i].y, location_list[k].x - location_list[i].x) - PI * 0.5; ofNoFill(); ofBeginShape(); for (auto rad = rad_start; rad < rad_start + PI; rad += PI / 180) { ofVertex(center + glm::vec2(6 * cos(rad), 6 * sin(rad))); } ofEndShape(); } } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |