public void TestBoundingBoxCalculationForZPlane()
{
Plane3 zPlane = new Plane3(Vector3.UnitZ * 2.0f, Vector3.Backward);
Assert.AreEqual(
new Volumes.AxisAlignedBox3(
new Vector3(float.NegativeInfinity, float.NegativeInfinity, 2.0f),
new Vector3(float.PositiveInfinity, float.PositiveInfinity, 2.0f)
),
zPlane.BoundingBox
);
}
public void TestBoundingBoxCalculationForYPlane()
{
Plane3 yPlane = new Plane3(Vector3.UnitY * 2.0f, Vector3.Up);
Assert.AreEqual(
new Volumes.AxisAlignedBox3(
new Vector3(float.NegativeInfinity, 2.0f, float.NegativeInfinity),
new Vector3(float.PositiveInfinity, 2.0f, float.PositiveInfinity)
),
yPlane.BoundingBox
);
}
public void TestBoundingBoxCalculationForXPlane()
{
Plane3 xPlane = new Plane3(Vector3.UnitX * 2.0f, Vector3.Right);
Assert.AreEqual(
new Volumes.AxisAlignedBox3(
new Vector3(2.0f, float.NegativeInfinity, float.NegativeInfinity),
new Vector3(2.0f, float.PositiveInfinity, float.PositiveInfinity)
),
xPlane.BoundingBox
);
}
public void TestSideDetermination()
{
Assert.AreEqual(
Side.Positive, Plane3.GetSide(Vector3.Zero, Vector3.Up, Vector3.UnitY)
);
Assert.AreEqual(
Side.Negative, Plane3.GetSide(Vector3.Zero, Vector3.Up, -Vector3.UnitY)
);
Assert.AreEqual(
Side.Negative, Plane3.GetSide(Vector3.UnitY * 2.0f, Vector3.Up, Vector3.UnitY)
);
}
public void TestBoundingBoxCalculation()
{
Vector3 diagonal = Vector3.Normalize(Vector3.One);
Plane3 plane = new Plane3(Vector3.Zero, diagonal);
Assert.AreEqual(
new Volumes.AxisAlignedBox3(
new Vector3(float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity),
new Vector3(float.PositiveInfinity, float.PositiveInfinity, float.PositiveInfinity)
),
plane.BoundingBox
);
}
public void TestRandomPointWithinForZPlane()
{
IRandom randomNumberGenerator = new DefaultRandom();
Plane3 zPlane = new Plane3(Vector3.UnitZ * 2.0f, Vector3.Backward);
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector3 randomPoint = zPlane.RandomPointWithin(randomNumberGenerator);
Assert.IsTrue(float.IsInfinity(randomPoint.X));
Assert.IsTrue(float.IsInfinity(randomPoint.Y));
Assert.AreEqual(2.0f, randomPoint.Z);
}
}
public void TestRandomPointOnPerimeterForYPlane()
{
IRandom randomNumberGenerator = new DefaultRandom();
Plane3 yPlane = new Plane3(Vector3.UnitY * 2.0f, Vector3.Up);
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector3 randomPoint = yPlane.RandomPointOnPerimeter(randomNumberGenerator);
Assert.IsTrue(float.IsInfinity(randomPoint.X));
Assert.AreEqual(2.0f, randomPoint.Y);
Assert.IsTrue(float.IsInfinity(randomPoint.Z));
}
}
public void TestCenterOfMass()
{
Plane3 zeroPlane = new Plane3(Vector3.Zero, Vector3.Up);
Assert.AreEqual(Vector3.Zero, zeroPlane.CenterOfMass);
Plane3 xPlane = new Plane3(Vector3.UnitX, Vector3.Right);
Assert.AreEqual(Vector3.Right, xPlane.CenterOfMass);
Plane3 yPlane = new Plane3(Vector3.UnitY, Vector3.Up);
Assert.AreEqual(Vector3.Up, yPlane.CenterOfMass);
Plane3 zPlane = new Plane3(Vector3.UnitZ, Vector3.Backward);
Assert.AreEqual(Vector3.Backward, zPlane.CenterOfMass);
}
public void TestRandomPointOnPerimeter()
{
IRandom randomNumberGenerator = new DefaultRandom();
// A random point has to involve infinity (since the chance that of hitting the
// meager numeric range of a float, or any other finite number system, is about
// zero for a infinitely large plane). But given the orientation of the plane,
// only these combinations of positive and negative infinity can be possible.
Vector3[] possiblePoints = new Vector3[] {
new Vector3(float.NegativeInfinity, float.PositiveInfinity, float.PositiveInfinity),
new Vector3(float.NegativeInfinity, float.NegativeInfinity, float.PositiveInfinity),
new Vector3(float.PositiveInfinity, float.PositiveInfinity, float.NegativeInfinity),
new Vector3(float.PositiveInfinity, float.NegativeInfinity, float.NegativeInfinity),
};
Plane3 plane = new Plane3(Vector3.Zero, Vector3.Normalize(Vector3.One));
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector3 randomPoint = plane.RandomPointOnPerimeter(randomNumberGenerator);
CollectionAssert.Contains(possiblePoints, randomPoint);
}
}
public void TestClosestPointToPlane()
{
Plane3 xPlane = new Plane3(Vector3.UnitX * 2.0f, Vector3.Right);
Assert.AreEqual(
new Vector3(2.0f, 20.0f, 30.0f),
xPlane.ClosestPointTo(new Vector3(10.0f, 20.0f, 30.0f))
);
Plane3 yPlane = new Plane3(Vector3.UnitY * 2.0f, Vector3.Up);
Assert.AreEqual(
new Vector3(10.0f, 2.0f, 30.0f),
yPlane.ClosestPointTo(new Vector3(10.0f, 20.0f, 30.0f))
);
Plane3 zPlane = new Plane3(Vector3.UnitZ * 2.0f, Vector3.Backward);
Assert.AreEqual(
new Vector3(10.0f, 20.0f, 2.0f),
zPlane.ClosestPointTo(new Vector3(10.0f, 20.0f, 30.0f))
);
}
public void TestAreaIsInfinite()
{
Plane3 plane = new Plane3(Vector3.Zero, Vector3.Up);
Assert.AreEqual(float.PositiveInfinity, plane.Area);
}
public void TestDistanceConstructor()
{
Plane3 plane = new Plane3(123.0f, Vector3.Up);
Assert.AreEqual(123.0f, plane.Offset.Length());
}
public void TestCircumferenceIsInfinite()
{
Plane3 plane = new Plane3(Vector3.Zero, Vector3.Up);
Assert.AreEqual(float.PositiveInfinity, plane.CircumferenceLength);
}