public void ClosestPoint_PerpendicularLines_DifferentOrigins()
{
var a = new Ray3(new Vector3(0, 1, -3), Vector3.UnitZ);
var b = new Ray3(new Vector3(0, -1, 0), Vector3.UnitX);
a.ClosestPoint(b, out var r1, out var r2);
Assert.AreEqual(3, r1);
Assert.AreEqual(0, r2);
}
public void AssertThat_RayClosestPoint_IsOnLine_AfterOneLength()
{
var ray = new Ray3(new Vector3(0, 1, 0), new Vector3(0, 10, 0));
var point = new Vector3(5, 150, 5);
var closest = ray.ClosestPoint(point);
Assert.AreEqual(new Vector3(0, 150, 0), closest);
}
public void ClosestPoint_AntiParallelLines()
{
var a = new Ray3(new Vector3(1, 2, 3), Vector3.UnitY);
var b = new Ray3(new Vector3(1, 2, 3), -Vector3.UnitY);
a.ClosestPoint(b, out var r1, out var r2);
Assert.AreEqual(0, r1);
Assert.AreEqual(0, r2);
}
public void AssertThat_RayClosestPoint_IsOnLine_BeforeStart()
{
var ray = new Ray3(new Vector3(0, 1, 0), new Vector3(0, 10, 0));
var point = new Vector3(5, 0, 5);
var closest = ray.ClosestPoint(point);
Assert.AreEqual(new Vector3(0, 0, 0), closest);
}