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近づいたら円を描く。
Draw a circle when you get close.
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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) {}; ofMesh mesh; vector<glm::vec3> circle_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->mesh.clear(); this->circle_list.clear(); vector<glm::vec2> location_list; for (int i = 0; i < 120; i++) { auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, -300, 300), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, -300, 300)); location_list.push_back(location); } for (int i = 0; i < location_list.size(); i++) { this->circle_list.push_back(glm::vec3(location_list[i], 0)); auto near_count = 0; for (int k = 0; k < location_list.size(); k++) { if (i == k) { continue; } auto distance = glm::distance(location_list[i], location_list[k]); if (distance < 50) { this->mesh.addVertex(glm::vec3(location_list[i], 0)); this->mesh.addVertex(glm::vec3(location_list[k], 0)); this->mesh.addIndex(this->mesh.getNumVertices() - 1); this->mesh.addIndex(this->mesh.getNumVertices() - 2); near_count++; } } this->circle_list.back().z = pow(1.5, near_count); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofSetLineWidth(0.5); this->mesh.drawWireframe(); ofSetLineWidth(1.5); for (auto& circle : this->circle_list) { ofFill(); ofSetColor(0); ofDrawCircle(glm::vec2(circle.x, circle.y), circle.z); ofNoFill(); ofSetColor(255); ofDrawCircle(glm::vec2(circle.x, circle.y), circle.z); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |