protected void ReturnNode(Pool <ProjectileData> .Node node)
{
if (node.Active)
{
node.Item.TimeToLive = -1;
if (node.Item.Outline.Item != null)
{
ProjectileOutlines.Return(node.Item.Outline.NodeIndex);
node.Item.Outline.Item = null;
}
Projectiles.Return(node.NodeIndex);
node.Active = false;
}
}
private void UpdateProjectiles(float tick)
{
ActiveProjectileCount = 0;
ContactFilter2D contactFilter = new ContactFilter2D
{
layerMask = LayerMask,
useTriggers = true,
};
ProjectileManager projectileManager = ProjectileManager.Instance;
//Update camera planes if needed
if (CullProjectilesOutsideCameraBounds)
{
GeometryUtility.CalculateFrustumPlanes(Camera, Planes);
}
// loop through all active projectile data
for (int i = 0; i < Projectiles.Nodes.Length; i++)
{
if (Projectiles.Nodes[i].Active)
{
Projectiles.Nodes[i].Item.TimeToLive -= tick;
// Projectile is active
if (Projectiles.Nodes[i].Item.TimeToLive > 0)
{
// apply acceleration
Projectiles.Nodes[i].Item.Velocity *= (1 + Projectiles.Nodes[i].Item.Acceleration * tick);
// apply gravity
Projectiles.Nodes[i].Item.Velocity += Projectiles.Nodes[i].Item.Gravity * tick;
// calculate where projectile will be at the end of this frame
Vector2 deltaPosition = Projectiles.Nodes[i].Item.Velocity * tick;
float distance = deltaPosition.magnitude;
// If flag set - return projectiles that are no longer in view
if (CullProjectilesOutsideCameraBounds)
{
Bounds bounds = new Bounds(Projectiles.Nodes[i].Item.Position, new Vector3(Projectiles.Nodes[i].Item.Scale, Projectiles.Nodes[i].Item.Scale, Projectiles.Nodes[i].Item.Scale));
if (!GeometryUtility.TestPlanesAABB(Planes, bounds))
{
Projectiles.Nodes[i].Item.TimeToLive = -1;
Projectiles.Return(Projectiles.Nodes[i].NodeIndex);
}
}
int result = -1;
if (CollisionDetection == CollisionDetectionType.Raycast)
{
result = Physics2D.Raycast(Projectiles.Nodes[i].Item.Position, deltaPosition, contactFilter, RaycastHitBuffer, distance);
}
else if (CollisionDetection == CollisionDetectionType.CircleCast)
{
result = Physics2D.CircleCast(Projectiles.Nodes[i].Item.Position, Projectiles.Nodes[i].Item.Scale / 2f, Projectiles.Nodes[i].Item.Velocity, contactFilter, RaycastHitBuffer, distance);
if (result > 0 && RaycastHitBuffer[0].distance == 0)
{
result = -1;
}
}
if (result > 0)
{
if (RaycastHitBuffer.Length == 1)
{
if (RaycastHitBuffer[0].collider.gameObject.tag == "NotForBullet" ||
RaycastHitBuffer[0].collider.gameObject.tag == shooterTag)
{
result = -1;
}
}
}
if (result > 0)
{
// Put whatever hit code you want here such as damage events
if (RaycastHitBuffer.Length > 1)
{
Debug.LogWarning("[彈幕系統]超過一個Raycast目標!");
}
if (RaycastHitBuffer[0].collider.GetComponent <LivingObject>())
{
RaycastHitBuffer[0].collider.GetComponent <LivingObject>().GetHurt(atk);
}
// Collision was detected, should we bounce off or destroy the projectile?
if (BounceOffSurfaces)
{
// rudementary bounce -- will work well on static surfaces
Projectiles.Nodes[i].Item.Velocity = Vector2.Reflect(Projectiles.Nodes[i].Item.Velocity, RaycastHitBuffer[0].normal);
// what fraction of the distance do we still have to move this frame?
float leakedFraction = 1f - RaycastHitBuffer[0].distance / distance;
deltaPosition = Projectiles.Nodes[i].Item.Velocity * tick * leakedFraction;
Projectiles.Nodes[i].Item.Position = RaycastHitBuffer[0].centroid + deltaPosition;
Projectiles.Nodes[i].Item.Color = Color.Evaluate(1 - Projectiles.Nodes[i].Item.TimeToLive / TimeToLive);
// Absorbs energy from bounce
Projectiles.Nodes[i].Item.Velocity = new Vector2(Mathf.Lerp(Projectiles.Nodes[i].Item.Velocity.x, 0, BounceAbsorbtion.x), Mathf.Lerp(Projectiles.Nodes[i].Item.Velocity.y, 0, BounceAbsorbtion.y));
projectileManager.UpdateBufferData(ActiveProjectileCount, ProjectileType, Projectiles.Nodes[i].Item);
ActiveProjectileCount++;
}
else
{
Projectiles.Nodes[i].Item.TimeToLive = -1;
Projectiles.Return(Projectiles.Nodes[i].NodeIndex);
}
}
else
{
//No collision -move projectile
Projectiles.Nodes[i].Item.Position += deltaPosition;
Projectiles.Nodes[i].Item.Color = Color.Evaluate(1 - Projectiles.Nodes[i].Item.TimeToLive / TimeToLive);
projectileManager.UpdateBufferData(ActiveProjectileCount, ProjectileType, Projectiles.Nodes[i].Item);
ActiveProjectileCount++;
}
}
else
{
// End of life - return to pool
Projectiles.Return(Projectiles.Nodes[i].NodeIndex);
}
}
}
}