calculateAngle static method

Implementation

static double calculateAngle(PoseLandmark a, PoseLandmark b, PoseLandmark c) {
  final ab = Offset(a.x - b.x, a.y - b.y);
  final cb = Offset(c.x - b.x, c.y - b.y);
  final dot = ab.dx * cb.dx + ab.dy * cb.dy;
  final magAB = sqrt(ab.dx * ab.dx + ab.dy * ab.dy);
  final magCB = sqrt(cb.dx * cb.dx + cb.dy * cb.dy);
  final angleRad = acos(dot / (magAB * magCB));
  return angleRad * 180 / pi;
}