public void ShouldCalculateHorizontalIntersectionPoint()
{
// given
var border = new Border(new Vector2D(0, 0), new Vector2D(0, 2));
// when
var intersectionPoint = border.GetIntersectionPoint(new Vector2D(-1, 1), new Vector2D(1, 1));
// then
Assert.That(intersectionPoint, Is.EqualTo(new Vector2D(0, 1)));
}
public void ShouldDetermineIfParticleCrossesVerticalBorder()
{
// given
var border = new Border(new Vector2D(0, 0), new Vector2D(0, 4));
var start = new Vector2D(-3, -3);
var end = new Vector2D(5, -5);
// when
var result = border.IsVectorCrossingBorder(start, end);
// then
Assert.That(result, Is.False);
}
public void ShouldDetermineIfParticleCrossesWhenDiagonal()
{
// given
var border = new Border(new Vector2D(200, 0), new Vector2D(350, 150));
var leftPoint = new Vector2D(200, 10);
var rightPoint = new Vector2D(400, 10);
// when
int leftSide = border.GetSide(leftPoint);
int rightSide = border.GetSide(rightPoint);
var result = border.IsVectorCrossingBorder(leftPoint, rightPoint);
// then
Assert.That(result, Is.False);
}
public void ShouldReturnPointSide()
{
// given
var border = new Border(new Vector2D(0, 0), new Vector2D(1, 0));
var topPoint = new Vector2D(0.5, 0.5);
var bottomPoint = new Vector2D(0.5, -0.5);
// when
int topSide = border.GetSide(topPoint);
int bottomSide = border.GetSide(bottomPoint);
// then
Assert.That(topSide * bottomSide, Is.LessThan(0));
}
public void ShouldReturnPointSideWhenVertical()
{
// given
var border = new Border(new Vector2D(0, 0), new Vector2D(0, 1));
var leftPoint = new Vector2D(-0.5, 0.5);
var rightPoint = new Vector2D(0.5, 0.5);
// when
int leftSide = border.GetSide(leftPoint);
int rightSide = border.GetSide(rightPoint);
// then
Assert.That(leftSide * rightSide, Is.LessThan(0));
}
public void ShouldReturnPointSideWhenDiagonal()
{
// given
var border = new Border(new Vector2D(200, 0), new Vector2D(350, 150));
var leftPoint = new Vector2D(200, 10);
var rightPoint = new Vector2D(400, 10);
// when
int leftSide = border.GetSide(leftPoint);
int rightSide = border.GetSide(rightPoint);
// then
Assert.That(leftSide * rightSide, Is.LessThan(0));
}