public void LeavingTheObstacle()
{
var obstaclePosition = new Vector2(0, 0);
var obstacleSize = new Vector2(1, 1);
var bulletPosition = new Vector2(0.5f, 0);
var bulletSize = new Vector2(1, 1);
var path = new Vector2(1, 0);
//Arrange
var world = WorldFactory.CreateWorld();
var bullet = new Body(bulletPosition, bulletSize);
var expectedObstacle = new Body(obstaclePosition, obstacleSize);
world.Add(expectedObstacle);
//Act
var actualMulticollisionEvent = world.GetCollisions(bullet, path).Single();
//Assert
Assert.IsNotNull(actualMulticollisionEvent);
Assert.AreEqual(1, actualMulticollisionEvent.Collisions.Count);
Assert.AreEqual((bulletPosition.X - obstaclePosition.X) / path.X, actualMulticollisionEvent.Traversed);
var collision = actualMulticollisionEvent.Collisions.Single();
var actualObstacle = collision.Bodies.Single();
Assert.AreEqual(expectedObstacle, actualObstacle);
Assert.AreEqual(CollisionType.Leaving, collision.Type);
Assert.AreEqual(Direction.Right, collision.NormalDirection);
}
public void EnteringIntoObstacle()
{
const float distance = 10;
var bulletPosition = new Vector2(0, 0);
var bulletSize = new Vector2(1, 1);
var obstaclePosition = new Vector2(bulletPosition.X + bulletSize.X + distance, 0);
var obstacleSize = new Vector2(1, 1);
var path = new Vector2(distance + obstacleSize.X/2, 0);
//Arrange
var world = WorldFactory.CreateWorld();
var bullet = new Body(bulletPosition, bulletSize);
var expectedObstacle = new Body(obstaclePosition, obstacleSize);
world.Add(expectedObstacle);
//Act
var actualMulticollisionEvent = world.GetCollisions(bullet, path).Single();
//Assert
Assert.IsNotNull(actualMulticollisionEvent);
Assert.AreEqual(1, actualMulticollisionEvent.Collisions.Count);
Assert.AreEqual(distance / path.X, actualMulticollisionEvent.Traversed);
var collision = actualMulticollisionEvent.Collisions.Single();
var actualObstacle = collision.Bodies.Single();
Assert.AreEqual(expectedObstacle, actualObstacle);
Assert.AreEqual(CollisionType.Entering, collision.Type);
Assert.AreEqual(Direction.Left, collision.NormalDirection);
}
public void PassingThroughObstacle()
{
const float distance = 10;
var bulletPosition = new Vector2(0, 0);
var bulletSize = new Vector2(1, 1);
var obstaclePosition = new Vector2(bulletPosition.X + bulletSize.X + distance, 0);
var obstacleSize = new Vector2(1, 1);
var path = new Vector2(distance + obstacleSize.X + bulletSize.X, 0);
//Arrange
var world = WorldFactory.CreateWorld();
var bullet = new Body(bulletPosition, bulletSize);
var expectedObstacle = new Body(obstaclePosition, obstacleSize);
world.Add(expectedObstacle);
//Act
var actualMulticollisionEvents = world.GetCollisions(bullet, path).ToArray();
//Assert
Assert.AreEqual(2, actualMulticollisionEvents.Length);
var enteringEvent = actualMulticollisionEvents[0];
var leavingEvent = actualMulticollisionEvents[1];
Assert.AreEqual(distance / path.X, enteringEvent.Traversed);
var collision = enteringEvent.Collisions.Single();
var actualObstacle = collision.Bodies.Single();
Assert.AreEqual(expectedObstacle, actualObstacle);
Assert.AreEqual(CollisionType.Entering, collision.Type);
Assert.AreEqual(Direction.Left, collision.NormalDirection);
Assert.AreEqual((distance + bulletSize.X + obstacleSize.X) / path.X, leavingEvent.Traversed);
collision = leavingEvent.Collisions.Single();
actualObstacle = collision.Bodies.Single();
Assert.AreEqual(expectedObstacle, actualObstacle);
Assert.AreEqual(CollisionType.Leaving, collision.Type);
Assert.AreEqual(Direction.Right, collision.NormalDirection);
}