public void TestFindingYIntersect()
{
//arrange
float a = 1;
Vector2 pointOnLine = Vector2.One * 2;
//act
float intersect = LineFormula.FindYIntersect(a, pointOnLine);
//assert
Assert.IsTrue(intersect == 0, "Not intersecting in origo!");
//arrange
a = 2;
pointOnLine = new Vector2(1, 3);
//act
intersect = LineFormula.FindYIntersect(a, pointOnLine);
//assert
Assert.IsTrue(intersect == 1, "Not intersecting in origo!");
//arrange
a = -3;
pointOnLine = new Vector2(1, 0);
//act
intersect = LineFormula.FindYIntersect(a, pointOnLine);
//assert
Assert.IsTrue(intersect == 3, "Not intersecting in origo!");
}
public void TestLineIntersectWithHorizontalLines()
{
//arrange
Vector2 direction = new Vector2(3, -2);
Vector2 knownPositionOnLine = new Vector2(3, 2);
var line = LineFormula.FromCoordinateAndDirection(knownPositionOnLine, direction);
float horizontalLinesYValue = 4;
//act
float xValueOfIntersectWithHorizontalLine = line.GetInterSectWithHorizontalLine(horizontalLinesYValue).Value;
//assert
Assert.IsTrue(xValueOfIntersectWithHorizontalLine == 0, "Not intersecting in origo!");
}
public void TestLineIntersectWithVerticalLines()
{
//arrange
Vector2 direction = new Vector2(3, -2);
Vector2 knownPositionOnLine = new Vector2(3, 2);
var line = LineFormula.FromCoordinateAndDirection(knownPositionOnLine, direction);
float verticalLinesXValue = -3;
//act
float yValueOfIntersectWithVerticalLine = line.GetInterSectWithVerticalLine(verticalLinesXValue).Value;
//assert
Assert.IsTrue(yValueOfIntersectWithVerticalLine == 6, "Not intersecting in origo!");
}
public void TestLineFormula()
{
//arrange
float angleInRadians = (float)Math.PI / 4;
Vector2 direction = angleInRadians.AngleAsVector();
var knownPositionOnLine = Vector2.One;
//act
var line = LineFormula.FromCoordinateAndDirection(knownPositionOnLine, direction);
var line2 = LineFormula.FromCoordinateAndDirection(knownPositionOnLine, angleInRadians);
//assert
Assert.IsTrue(line.B == 0, "Not intersecting in origo!");
Assert.AreEqual(line, line2, "Not getting same line objects from constructors");
}