public void ConicTangentLineTest()
{
var unitCircle = Conic2.Circle(new Vector2(0, 0), 1);
var pointOnCircle = new Vector2(1, 0);
var tangentLine = unitCircle.GetTangetLineAtPoint(pointOnCircle);
Assert.True(tangentLine.ContainsPoint(new Vector2(1, 0)));
Assert.True(tangentLine.ContainsPoint(new Vector2(1, 1)));
}
public void UnitCircleTest()
{
var unit = Conic2.Circle(new Vector2(0, 0), 1);
var expected = new Matrix(3, 3,
1, 0, 0,
0, 1, 0,
0, 0, -1);
Assert.Equal(expected, unit, MatrixComparer.Instance);
}
public void CircleConicTest()
{
var delta = Math.PI / 6.0; // 30 degrees
var points = new List <Vector2>();
var angle = 0.0;
for (int i = 0; i < 5; i++, angle += delta)
{
points.Add(new Vector2(Math.Cos(angle), Math.Sin(angle)));
}
var circle = Conic2.FromPoints(points[0], points[1], points[2], points[3], points[4]);
Assert.True(circle.IsCircle);
AssertClose(new Vector2(0, 0), circle.Center);
}