exceedsBy function

Offset exceedsBy(Quad boundary, Quad viewport)

Implementation

Offset exceedsBy(Quad boundary, Quad viewport) {
  final List<Vector3> viewportPoints = <Vector3>[
    viewport.point0,
    viewport.point1,
    viewport.point2,
    viewport.point3,
  ];
  Offset largestExcess = Offset.zero;
  for (final Vector3 point in viewportPoints) {
    final Vector3 pointInside =
        BetterInteractiveViewerBase.getNearestPointInside(point, boundary);
    final Offset excess = Offset(
      pointInside.x - point.x,
      pointInside.y - point.y,
    );
    if (excess.dx.abs() > largestExcess.dx.abs()) {
      largestExcess = Offset(excess.dx, largestExcess.dy);
    }
    if (excess.dy.abs() > largestExcess.dy.abs()) {
      largestExcess = Offset(largestExcess.dx, excess.dy);
    }
  }

  return round(largestExcess);
}