Export .ply from mesh (openframeworks)

example_export.cpp

void ofApp::exportPlyCloud(ofMesh pcMesh, string filename){

    ofFile ply;
    if(ply.open(filename, ofFile::WriteOnly)){
        // write the header
        ply << "ply" << endl;
        ply << "format binary_little_endian 1.0" << endl;
        ply << "element vertex " << pcMesh.getVertices().size() << endl;
        ply << "property float x" << endl;
        ply << "property float y" << endl;
        ply << "property float z" << endl;
        ply << "end_header" << endl;
        
        // write all the vertices
        vector<ofVec3f>& surface = pcMesh.getVertices();
        for(int i = 0; i < surface.size(); i++){
            if(surface[i].z != 0){
                // write the raw data as if it were a stream of bytes
                ply.write((char *) &surface[i], sizeof(ofVec3f));
            }
        }
    }
}