| // Copyright 2017 The Fuchsia Authors. All rights reserved. |

| // Use of this source code is governed by a BSD-style license that can be |

| // found in the LICENSE file. |

| /// Describes where a hit occurred within the content of a node tagged |

| /// To compute the point of intersection within the node's local coordinate |

| /// system, perform the following calculation using the ray which was |

| /// originally passed to `Session.HitTest()`. |

| /// hit_point = ray.origin + (hit.distance * ray.direction) |

| /// local_point = hit.inverse_transform * hit_point |

| /// The node's tag value. |

| /// The origin of the ray that was used for the hit test, in the hit |

| /// node's coordinate system. |

| /// The direction of the ray that was used for the hit test, in the hit |

| /// node's coordinate system. |

| /// The inverse transformation matrix which maps the coordinate system of |

| /// the node at which the hit test was initiated into the local coordinate |

| /// system of the node which was hit. |

| /// The distance from the ray's origin to the closest point of intersection |

| /// in multiples of the ray's direction vector. |