public void TestUpdatePositionWithVelocity()
{
//Arrange
var pool = new Pool(BoidsComponentIds.TotalComponents);
FlockingSystem flockingSystem = new FlockingSystem();
flockingSystem.PreserveExistingDirectionWeight = 1;
flockingSystem.NormalVelocity = 7.6f;
pool.CreateSystem(flockingSystem);
Vector3 startingPosition = new Vector3(10, 15, -3);
Vector3 direction = new Vector3(0.3f, -0.7f, 0.1f).normalized;
float velocityMagnitude = flockingSystem.NormalVelocity;
int numberOfUpdates = 3;
var boid = pool.CreateEntity().
AddPosition(startingPosition).
AddVelocity(direction, velocityMagnitude).
IsBoid(true);
//Act
for (int update = 0; update < numberOfUpdates; ++update)
{
flockingSystem.Execute();
}
//Assert
Assert.That(Vector3.Distance(
boid.position.Position,
startingPosition + velocityMagnitude * direction * numberOfUpdates * flockingSystem.Deltatime),
Is.LessThanOrEqualTo(0.1f));
}
public void TestPreserveExistingDirection()
{
//Arrange
var pool = new Pool(BoidsComponentIds.TotalComponents);
FlockingSystem flockingSystem = new FlockingSystem();
flockingSystem.PreserveExistingDirectionWeight = 1;
pool.CreateSystem(flockingSystem);
var boid = pool.CreateEntity().
AddPosition(new Vector3(0, 0, 0)).
AddVelocity(new Vector3(0, 0, 1), 10).
IsBoid(true);
//Act
flockingSystem.Execute();
flockingSystem.Execute();
flockingSystem.Execute();
//Assert
Assert.That(
boid.velocity.Direction, Is.EqualTo(new Vector3(0, 0, 1)));
}
public void TestMaxDistanceToCenter()
{
//Arrange
var pool = new Pool(BoidsComponentIds.TotalComponents);
FlockingSystem flockingSystem = new FlockingSystem();
flockingSystem.PreserveExistingDirectionWeight = 1;
flockingSystem.MaxDistToCenterWeight = 2;
pool.CreateSystem(flockingSystem);
Vector3 startingPosition = new Vector3(50, 50, 50);
Vector3 direction = new Vector3(1f, 1f, 1f).normalized;
float velocityMagnitude = flockingSystem.NormalVelocity;
int numberOfUpdates = 200;
var boid = pool.CreateEntity().
AddPosition(startingPosition).
AddVelocity(direction, velocityMagnitude).
IsBoid(true);
float[] distancesToCenter = new float[numberOfUpdates];
//Act
for (int update = 0; update < numberOfUpdates; ++update)
{
flockingSystem.Execute();
distancesToCenter[update] = boid.position.Position.magnitude;
}
//Assert
for (int update = 0; update < numberOfUpdates; ++update)
{
Assert.That(
distancesToCenter[update], Is.LessThan(flockingSystem.MaxDistToCenter));
}
}
