VecVecPoint3f.generate constructor
      
      VecVecPoint3f.generate(
    
    
- int length,
- VecPoint3f generator(- int i
 
- bool dispose = true,
Implementation
factory VecVecPoint3f.generate(int length, VecPoint3f Function(int i) generator, {bool dispose = true}) {
  final p = ccore.std_VecVecPoint3f_new(length);
  int count = 0;
  for (var i = 0; i < length; i++) {
    final v = generator(i);
    count += v.length;
    ccore.std_VecVecPoint3f_set(p, i, v.ref);
    if (dispose) v.dispose();
  }
  return VecVecPoint3f.fromPointer(p, externalSize: count * ffi.sizeOf<cvg.CvPoint3f>());
}