/// <summary>
/// Determines whether there is an intersection between a <see cref="Ray" /> and a <see cref="OrientedBoundingBox" />.
/// </summary>
/// <param name="ray">The ray to test.</param>
/// <param name="point">When the method completes, contains the point of intersection, or <see cref="Vector3.Zero" /> if there was no intersection.</param>
/// <returns>Whether the two objects intersected.</returns>
public bool Intersects(ref Ray ray, out Vector3 point)
{
// Put ray in box space
Ray bRay;
Transformation.WorldToLocalVector(ref ray.Direction, out bRay.Direction);
Transformation.WorldToLocal(ref ray.Position, out bRay.Position);
// Perform a regular ray to BoundingBox check
var bb = new BoundingBox(-Extents, Extents);
bool intersects = CollisionsHelper.RayIntersectsBox(ref bRay, ref bb, out point);
// Put the result intersection back to world
if (intersects)
{
Transformation.LocalToWorld(ref point, out point);
}
return(intersects);
}
/// <summary>
/// Determines whether there is an intersection between a <see cref="Ray" /> and a <see cref="OrientedBoundingBox" />.
/// </summary>
/// <param name="ray">The ray to test.</param>
/// <param name="point">
/// When the method completes, contains the point of intersection,
/// or <see cref="Vector3.Zero" /> if there was no intersection.
/// </param>
/// <returns>Whether the two objects intersected.</returns>
public bool Intersects(ref Ray ray, out Vector3 point)
{
// Put ray in box space
Matrix.Invert(ref Transformation, out Matrix invTrans);
Ray bRay;
Vector3.TransformNormal(ref ray.Direction, ref invTrans, out bRay.Direction);
Vector3.TransformCoordinate(ref ray.Position, ref invTrans, out bRay.Position);
//Perform a regular ray to BoundingBox check
var bb = new BoundingBox(-Extents, Extents);
bool intersects = CollisionsHelper.RayIntersectsBox(ref bRay, ref bb, out point);
//Put the result intersection back to world
if (intersects)
{
Vector3.TransformCoordinate(ref point, ref Transformation, out point);
}
return(intersects);
}
/// <summary>
/// Determines if there is an intersection between the current object and a <see cref="BoundingBox" />.
/// </summary>
/// <param name="box">The box to test.</param>
/// <param name="point">
/// When the method completes, contains the point of intersection,
/// or <see cref="Vector3.Zero" /> if there was no intersection.
/// </param>
/// <returns>Whether the two objects intersected.</returns>
public bool Intersects(ref BoundingBox box, out Vector3 point)
{
return(CollisionsHelper.RayIntersectsBox(ref this, ref box, out point));
}
/// <summary>
/// Determines if there is an intersection between the current object and a <see cref="BoundingBox" />.
/// </summary>
/// <param name="box">The box to test.</param>
/// <param name="distance">
/// When the method completes, contains the distance of the intersection,
/// or 0 if there was no intersection.
/// </param>
/// <returns>Whether the two objects intersected.</returns>
public bool Intersects(ref BoundingBox box, out float distance)
{
return(CollisionsHelper.RayIntersectsBox(ref this, ref box, out distance));
}
