public void RectRayCasting_ShouldReturnNull_WhenInOppositeDirection()
{
// arrange
MapRect rect = new MapRect(1, 0, 2, 2);
Ray ray = new Ray(-3, 0, -1, 0);
// act
Trace trace = RayCast.CheckBulletTrace(ray, rect);
// assert
Assert.IsNull(trace);
}
public void CircleRayCasting_ShouldReturnNull_WhenInOppositeDirection()
{
// arrange
MapCircle circle = new MapCircle(1, 0, 1);
Ray ray = new Ray(-3, 0, -1, 0);
// act
Trace trace = RayCast.CheckBulletTrace(ray, circle);
// assert
Assert.IsNull(trace);
}
public void CircleRayCasting_ShouldReturnHitPosition_2()
{
// arrange
MapCircle circle = new MapCircle(10, 10, 1);
Ray ray = new Ray(20, 10, -1, 0);
// act
Trace trace = RayCast.CheckBulletTrace(ray, circle);
// assert
Assert.IsNotNull(trace);
Assert.AreEqual(trace.Position, new Vector2(11, 10));
}
public void RectRayCasting_ShouldReturnHitPosition_3()
{
// arrange
MapRect rect = new MapRect(10, 10, 1, 1);
Ray ray = new Ray(10, 12, 0, -1);
// act
Trace trace = RayCast.CheckBulletTrace(ray, rect);
// assert
Assert.IsNotNull(trace);
Assert.AreEqual(trace.Position, new Vector2(10, 10.5));
}
public void CircleRayCasting_ShouldReturnHitPosition_1()
{
// arrange
MapCircle circle = new MapCircle(10, 10, 1);
Ray ray = new Ray(0, 0, 1, 1);
// act
Trace trace = RayCast.CheckBulletTrace(ray, circle);
// assert
Assert.IsNotNull(trace);
var c = Math.Sqrt(2) / 2;
Vector2 expectedPosition = circle.Position - new Vector2(c, c);
Assert.AreEqual(expectedPosition.X, trace.Position.X, 1e-6);
Assert.AreEqual(expectedPosition.Y, trace.Position.Y, 1e-6);
}