public void LineAlgorithmsCoincidesTest()
{
// coinciding lines
Coordinate firstCoordinate = new Coordinate(1, 1);
CoordinateVector firstVector = new CoordinateVector(0, 2);
Coordinate secondCoordinate = new Coordinate(1, 1);
CoordinateVector secondVector = new CoordinateVector(0, 4);
Assert.IsTrue(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
firstCoordinate = new Coordinate(2, 5);
firstVector = new CoordinateVector(0, 1);
secondCoordinate = new Coordinate(2, 4);
secondVector = new CoordinateVector(0, 4);
Assert.IsTrue(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
firstCoordinate = new Coordinate(15, 7);
firstVector = new CoordinateVector(9, 5);
secondCoordinate = new Coordinate(15, 7);
secondVector = new CoordinateVector(9, 5);
Assert.IsTrue(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
firstCoordinate = new Coordinate(2, 4);
firstVector = new CoordinateVector(3, -1);
secondCoordinate = new Coordinate(14, 0);
secondVector = new CoordinateVector(3, -1);
Assert.IsTrue(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
// not coinciding lines
firstCoordinate = new Coordinate(1, 1);
firstVector = new CoordinateVector(0, 1);
secondCoordinate = new Coordinate(1, 1);
secondVector = new CoordinateVector(1, 0);
Assert.IsFalse(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
firstCoordinate = new Coordinate(2, 5);
firstVector = new CoordinateVector(0, 1);
secondCoordinate = new Coordinate(2, 4);
secondVector = new CoordinateVector(4, 0);
Assert.IsFalse(LineAlgorithms.Coincides(firstCoordinate, firstVector, secondCoordinate, secondVector));
}
public void LineAlgorithmsIsParallelTest()
{
// parallel lines
Coordinate firstLineStart = new Coordinate(1, 1);
Coordinate firstLineEnd = new Coordinate(4, 1);
Coordinate secondLineStart = new Coordinate(2, 2);
Coordinate secondLineEnd = new Coordinate(4, 2);
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
Assert.IsFalse(LineAlgorithms.Intersects(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
firstLineStart = new Coordinate(1.2, 1.2);
firstLineEnd = new Coordinate(1.2, 7.2);
secondLineStart = new Coordinate(2.2, 8.2);
secondLineEnd = new Coordinate(2.2, 15.2);
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
Assert.IsFalse(LineAlgorithms.Intersects(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
firstLineStart = new Coordinate(1, 1);
firstLineEnd = new Coordinate(1, 7);
secondLineStart = new Coordinate(1, 1);
secondLineEnd = new Coordinate(1, 7);
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
Assert.IsTrue(LineAlgorithms.Intersects(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
// non parallel lines
firstLineStart = new Coordinate(1, 1);
firstLineEnd = new Coordinate(1, 7);
secondLineStart = new Coordinate(2, 1);
secondLineEnd = new Coordinate(2.2, 8);
Assert.IsFalse(LineAlgorithms.IsParallel(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
firstLineStart = new Coordinate(1, 1);
firstLineEnd = new Coordinate(1, 7);
secondLineStart = new Coordinate(0, 2);
secondLineEnd = new Coordinate(10, 2);
Assert.IsFalse(LineAlgorithms.IsParallel(firstLineStart, firstLineEnd, secondLineStart, secondLineEnd));
// parallel infinite lines
firstLineStart = new Coordinate(1, 1);
CoordinateVector firstVector = new CoordinateVector(0, 1);
secondLineStart = new Coordinate(2, 2);
CoordinateVector secondVector = new CoordinateVector(0, 1);
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstVector, secondLineStart, secondVector));
firstLineStart = new Coordinate(2, 5);
firstVector = new CoordinateVector(0, 1);
secondLineStart = new Coordinate(2, 4);
secondVector = new CoordinateVector(0, 4);
Assert.IsTrue(LineAlgorithms.Coincides(firstLineStart, firstVector, secondLineStart, secondVector));
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstVector, secondLineStart, secondVector));
firstLineStart = new Coordinate(2, 4);
firstVector = new CoordinateVector(-3, 1);
secondLineStart = new Coordinate(5, 3);
secondVector = new CoordinateVector(-3, 1);
Assert.IsTrue(LineAlgorithms.IsParallel(firstLineStart, firstVector, secondLineStart, secondVector));
// non parallel infinite lines
firstLineStart = new Coordinate(1, 1);
firstVector = new CoordinateVector(0, 1);
secondLineStart = new Coordinate(1, 1);
secondVector = new CoordinateVector(1, 0);
Assert.IsTrue(LineAlgorithms.Intersects(firstLineStart, firstVector, secondLineStart, secondVector));
Assert.IsFalse(LineAlgorithms.IsParallel(firstLineStart, firstVector, secondLineStart, secondVector));
firstLineStart = new Coordinate(2, 5);
firstVector = new CoordinateVector(0, 1);
secondLineStart = new Coordinate(2, 4);
secondVector = new CoordinateVector(4, 0);
Assert.IsTrue(LineAlgorithms.Intersects(firstLineStart, firstVector, secondLineStart, secondVector));
Assert.IsFalse(LineAlgorithms.IsParallel(firstLineStart, firstVector, secondLineStart, secondVector));
}