public void TestClosestPointTo()
{
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
Random randomNumberGenerator = new Random();
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector2 randomPoint = new Vector2(
(float)randomNumberGenerator.NextDouble() * testDisc.Radius * 4.0f,
(float)randomNumberGenerator.NextDouble() * testDisc.Radius * 4.0f
);
randomPoint += testDisc.Center;
float distance = (randomPoint - testDisc.Center).Length();
if (distance < testDisc.Radius)
{
Assert.AreEqual(randomPoint, testDisc.ClosestPointTo(randomPoint));
}
else
{
Vector2 closestPoint = testDisc.ClosestPointTo(randomPoint);
Assert.That(
(closestPoint - testDisc.Center).Length(),
Is.EqualTo(testDisc.Radius).Within(36).Ulps
// TODO: This method suffers from accuracy problems!
);
}
}
}
public void TestConstructor()
{
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 9.0f);
Assert.AreEqual(12.34f, testDisc.Center.X);
Assert.AreEqual(56.78f, testDisc.Center.Y);
Assert.AreEqual(9.0f, testDisc.Radius);
}
public void TestBoundingBox() {
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
AxisAlignedRectangle2 boundingRectangle = testDisc.BoundingBox;
Assert.AreEqual(testDisc.Center.X - testDisc.Radius, boundingRectangle.Min.X);
Assert.AreEqual(testDisc.Center.X + testDisc.Radius, boundingRectangle.Max.X);
Assert.AreEqual(testDisc.Center.Y - testDisc.Radius, boundingRectangle.Min.Y);
Assert.AreEqual(testDisc.Center.Y + testDisc.Radius, boundingRectangle.Max.Y);
}
public void TestBoundingBox()
{
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
AxisAlignedRectangle2 boundingRectangle = testDisc.BoundingBox;
Assert.AreEqual(testDisc.Center.X - testDisc.Radius, boundingRectangle.Min.X);
Assert.AreEqual(testDisc.Center.X + testDisc.Radius, boundingRectangle.Max.X);
Assert.AreEqual(testDisc.Center.Y - testDisc.Radius, boundingRectangle.Min.Y);
Assert.AreEqual(testDisc.Center.Y + testDisc.Radius, boundingRectangle.Max.Y);
}
public void TestRandomPointOnPerimeter()
{
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
DefaultRandom randomNumberGenerator = new DefaultRandom();
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector2 randomPoint = testDisc.RandomPointOnPerimeter(randomNumberGenerator);
Assert.That(
(testDisc.Center - randomPoint).Length(),
Is.EqualTo(testDisc.Radius).Within(36).Ulps
// TODO: This method suffers from accuracy problems!
);
}
}
public void TestRandomPointWithin()
{
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
DefaultRandom randomNumberGenerator = new DefaultRandom();
for (int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index)
{
Vector2 randomPoint = testDisc.RandomPointWithin(randomNumberGenerator);
float randomPointDistance = (testDisc.Center - randomPoint).Length();
if (!FloatHelper.AreAlmostEqual(randomPointDistance, testDisc.Radius, 36))
{
Assert.LessOrEqual(randomPointDistance, testDisc.Radius);
}
}
}
public void TestClosestPointTo() {
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
Random randomNumberGenerator = new Random();
for(int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index) {
Vector2 randomPoint = new Vector2(
(float)randomNumberGenerator.NextDouble() * testDisc.Radius * 4.0f,
(float)randomNumberGenerator.NextDouble() * testDisc.Radius * 4.0f
);
randomPoint += testDisc.Center;
float distance = (randomPoint - testDisc.Center).Length();
if(distance < testDisc.Radius) {
Assert.AreEqual(randomPoint, testDisc.ClosestPointTo(randomPoint));
} else {
Vector2 closestPoint = testDisc.ClosestPointTo(randomPoint);
Assert.That(
(closestPoint - testDisc.Center).Length(),
Is.EqualTo(testDisc.Radius).Within(36).Ulps
// TODO: This method suffers from accuracy problems!
);
}
}
}
public void TestCenterOfMass() {
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(testDisc.Center, testDisc.CenterOfMass);
}
public void TestCircumferenceLength() {
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(125.66371f, testDisc.CircumferenceLength);
}
public void TestSurfaceArea() {
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(1256.63706f, testDisc.Area);
}
public void TestConstructor() {
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 9.0f);
Assert.AreEqual(12.34f, testDisc.Center.X);
Assert.AreEqual(56.78f, testDisc.Center.Y);
Assert.AreEqual(9.0f, testDisc.Radius);
}
public void TestRandomPointWithin() {
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
DefaultRandom randomNumberGenerator = new DefaultRandom();
for(int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index) {
Vector2 randomPoint = testDisc.RandomPointWithin(randomNumberGenerator);
float randomPointDistance = (testDisc.Center - randomPoint).Length();
if(!FloatHelper.AreAlmostEqual(randomPointDistance, testDisc.Radius, 36)) {
Assert.LessOrEqual(randomPointDistance, testDisc.Radius);
}
}
}
public void TestRandomPointOnPerimeter() {
Disc2 testDisc = new Disc2(new Vector2(123.4f, 567.8f), 9.0f);
DefaultRandom randomNumberGenerator = new DefaultRandom();
for(int index = 0; index < Specifications.ProbabilisticFunctionSamples; ++index) {
Vector2 randomPoint = testDisc.RandomPointOnPerimeter(randomNumberGenerator);
Assert.That(
(testDisc.Center - randomPoint).Length(),
Is.EqualTo(testDisc.Radius).Within(36).Ulps
// TODO: This method suffers from accuracy problems!
);
}
}
public void TestCenterOfMass()
{
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(testDisc.Center, testDisc.CenterOfMass);
}
public void TestCircumferenceLength()
{
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(125.66371f, testDisc.CircumferenceLength);
}
public void TestSurfaceArea()
{
Disc2 testDisc = new Disc2(new Vector2(12.34f, 56.78f), 20.0f);
Assert.AreEqual(1256.63706f, testDisc.Area);
}