Scalar constructor
Implementation
factory Scalar([double val1 = 0.0, double val2 = 0.0, double val3 = 0.0, double val4 = 0.0]) {
final p = calloc<cvg.Scalar>()
..ref.val1 = val1
..ref.val2 = val2
..ref.val3 = val3
..ref.val4 = val4;
return Scalar._(p);
}