gradw method

void gradw(
  1. Vector3 rVec,
  2. Vector3 resultVec
)

Implementation

void gradw(Vector3 rVec,Vector3 resultVec) {
  final r = rVec.length;
  final h = smoothingRadius;
  rVec.scale2(945.0 / (32.0 * math.pi * math.pow(h, 9)) * math.pow((h * h - r * r), 2).toDouble(), resultVec);
}