public void TestParallelLineAbovePlane()
{
LineContacts contacts = Line3Plane3Collider.FindContacts(
new Vector3(0.0f, 10.0f, 0.0f), Vector3.Right,
new Vector3(0.0f, 0.0f, 0.0f), Vector3.Up
);
Assert.IsFalse(contacts.HasContact);
}
public void TestParallelLineBelowPlane()
{
LineContacts contacts = Line3Plane3Collider.FindContacts(
new Vector3(-10.0f, 0.0f, 0.0f), Vector3.Up,
new Vector3(0.0f, 0.0f, 0.0f), Vector3.Left
);
Assert.IsFalse(contacts.HasContact);
}
public void TestLineCrossingPlaneDiagonally()
{
LineContacts contacts = Line3Plane3Collider.FindContacts(
new Vector3(-10.0f, 0.0f, 0.0f), Vector3.Normalize(Vector3.One),
new Vector3(0.0f, 0.0f, 0.0f), Vector3.Left
);
float touchTime = 10.0f / Vector3.Normalize(Vector3.One).X;
Assert.That(
contacts.EntryTime,
Is.EqualTo(touchTime).Within(Specifications.MaximumDeviation).Ulps
);
Assert.That(
contacts.ExitTime,
Is.EqualTo(touchTime).Within(Specifications.MaximumDeviation).Ulps
);
}
/// <summary>Determines where a ray will hit a plane, if at all</summary>
/// <param name="rayStart">Starting point of the ray</param>
/// <param name="rayDirection">Direction into which the ray extends</param>
/// <param name="planeOffset">Offset of the plane</param>
/// <param name="planeNormal">Normal vector of the plane</param>
/// <returns>The intersection points between the ray and the plane, if any</returns>
public static LineContacts FindContacts(
Vector3 rayStart, Vector3 rayDirection,
Vector3 planeOffset, Vector3 planeNormal
)
{
LineContacts contacts = Line3Plane3Collider.FindContacts(
rayStart, rayDirection, planeOffset, planeNormal
);
// If the contact occured before the starting offset of the ray,
// no collision took place since we're a ray
if (!float.IsNaN(contacts.EntryTime))
{
if (contacts.EntryTime < 0.0f)
{
return(LineContacts.None);
}
}
return(contacts);
}