private void RewardMovementAgent()
{
Collider2D coll = Physics2D.OverlapPoint((Vector2)transform.position, _layerMaskBirdEnv);
// Check what's been shot
if (coll && coll.tag.Equals(_BIRD_TAG))
{
BirdBehavior bird = coll.GetComponent <BirdBehavior>();
// Reward the agent for hitting a bird based on the bird's size
switch (bird.BirdSize)
{
case BirdSize.S:
_movementAgent.AddReward(2.0f);
break;
case BirdSize.M:
_movementAgent.AddReward(0.75f);
break;
case BirdSize.L:
_movementAgent.AddReward(0.25f);
break;
}
}
else
{
// Punish for hitting nothing
_movementAgent.AddReward(-0.1f);
}
}
public override void OnInspectorGUI()
{
DrawDefaultInspector();
BirdBehavior birdBehavior = (BirdBehavior)target;
if (GUILayout.Button("SpottedByGaze"))
{
birdBehavior.SpottedByGaze();
}
}
/// <summary>
/// Shoots at the position of the agent, if enough ammo is left.
/// </summary>
protected void Shoot()
{
if (_leftAmmo > 0 || _infinteAmmo)
{
_shotCount++;
Collider2D coll = Physics2D.OverlapPoint((Vector2)transform.position, _layerMaskBirdEnv);
// Check what's been shot
if (coll && coll.tag.Equals(_BIRD_TAG))
{
BirdBehavior bird = coll.GetComponent <BirdBehavior>();
bird.Hit();
// Reward the agent for hitting a bird based on the bird's size
switch (bird.BirdSize)
{
case BirdSize.S:
AddReward(2.0f);
break;
case BirdSize.M:
AddReward(0.75f);
break;
case BirdSize.L:
AddReward(0.25f);
break;
}
_hitCount++;
}
else
{
// Punish for hitting nothing
AddReward(-0.1f);
}
if (!_infinteAmmo)
{
// Decrease ammo
_leftAmmo--;
}
}
else
{
// Punish the agent for trying to shoot without ammo
AddReward(-1f);
}
// Update UI
_accuracyText.text = "Shot Accuracy: " + ((float)_hitCount / (float)_shotCount).ToString("0.00");
_ammoText.text = "Ammo: " + _leftAmmo + " / " + _maxAmmo;
}
private void SpawnBirds()
{
GameObject bird;
for (int i = 0; i < birdLandingSpots.Count; i++)
{
if (birdLandingSpots[i].birdToSpawn)
{
bird = Instantiate(birdPrefab, birdLandingSpots[i].transform.position, birdLandingSpots[i].transform.rotation);
BirdBehavior birdBehavior = bird.GetComponent <BirdBehavior>();
birds.Add(birdBehavior);
birdBehavior.currentLandingSpot = birdLandingSpots[i];
birdBehavior.SetColor(birdLandingSpots[i].birdToSpawn.birdMaterial);
birdBehavior.treePreference = birdLandingSpots[i].birdToSpawn.treePreference;
UnoccupiedSpots.Remove(birdLandingSpots[i]);
}
}
}
/// <summary>
/// Spawns a single bird.
/// </summary>
public void Spawn()
{
// Spawn position (x,y)
// Decide on spawn site
var spawnSite = Random.Range(0, 2);
var size = Random.Range(0, 3);
var spawnZAdjustment = Random.Range(0.1f, 0.2f); // This modification on the Z-Axis shall prevent flickering issues of overlapping sprites
Vector3 spawnPos;
if (spawnSite == 0) // left
{
spawnPos = new Vector3(_leftTopSpawnIndicatior.position.x,
Random.Range(_rightBottomIndicator.position.y, _leftTopSpawnIndicatior.position.y), size - spawnZAdjustment);
}
else // right
{
spawnPos = new Vector3(_rightBottomIndicator.position.x,
Random.Range(_rightBottomIndicator.position.y, _leftTopSpawnIndicatior.position.y), size - spawnZAdjustment);
}
// Instantiate bird (i.e. reuse pooledbird)
GameObject bird = GetBird();
if (bird != null)
{
bird.transform.position = spawnPos;
bird.transform.rotation = Quaternion.identity;
bird.SetActive(true);
BirdBehavior birdBehavior = bird.GetComponent <BirdBehavior>();
// Initialize bird behavior
var speed = Random.Range(1.5f, 6f);
birdBehavior.Init(this, (BirdSize)size, speed, spawnSite != 0);
}
}
