Hairball in openFrameworks.

main.cpp

#include "ofMain.h"

class ofApp : public ofBaseApp {
public:
    ofEasyCam cam;
    vector<ofVec3f> vertices;
    ofVboMesh mesh;
    void setup() {
        ofSetVerticalSync(false);
        int n = 250;
        for(int i = 0; i < n; i++) {
            ofVec3f v(ofRandom(50, 250), 0, 0);
            v.rotate(ofRandom(360), ofRandom(360), ofRandom(360));
            vertices.push_back(v);
        }
        for(int i = 0; i < n; i++) {
            for(int j = 0; j < n; j++) {
                mesh.addVertex(vertices[i]);
                mesh.addVertex(vertices[j]);
            }
        }
        ofLog() << mesh.getNumVertices() / 2;
        mesh.setMode(OF_PRIMITIVE_LINES);
        ofBackground(0);
    }
    void draw() {
        ofSetColor(255, 2);
        cam.begin();
        ofRotateY(ofGetElapsedTimef() * 90);
        mesh.draw();
        cam.end();
        ofSetColor(255);
        ofDrawBitmapString(ofToString((int) ofGetFrameRate()), 10, 20);
    }
};
int main() {
    ofSetupOpenGL(1280, 720, OF_WINDOW);
    ofRunApp(new ofApp());
}