protected void ConfigureDefaultLaunchEvent(ProjectileLaunchEvent launchEvent)
{
//-- Does nothing by default; meant to be overridden by subclasses
// if they need the launch event to diverge from default settings
// while still benefiting from the generation of a default launch
// event.
}
//-- Class body
/**
* Instantiates and launches an instance of the projectile prefab assigned to this projectile launcher.
*/
protected void LaunchProjectile()
{
//-- Make the projectile
GameObject projectileInstance = Instantiate(m_ProjectilePrefab
, gameObject.transform.position
, Quaternion.identity) as GameObject;
//-- Set projectile collection as parent
projectileInstance.transform.SetParent(ProjectileCollection.instance.gameObject.transform);
//-- Generate and send launch parameters to the new projectile
ProjectileLaunchEvent launchEvent = GenerateLaunchEvent();
projectileInstance.SendMessage(AbstractProjectile.MESSAGE_LAUNCH
, launchEvent
, SendMessageOptions.RequireReceiver);
}
protected sealed override ProjectileLaunchEvent GenerateLaunchEvent()
{
//-- Resolve the direction of the shot relavitve to the world
Vector3 direction = gameObject.transform.TransformVector(new Vector3(1.0f, 0.0f, 0.0f));
float resultantForce = m_LaunchForce;
Vector2 resultantDirection = direction.normalized; //-- Normalized in case the transform scale changed the length of the vector
//-- Add the velocity of the projectile launcher to acheive a
// nice smooth-looking launch
if (null != m_Body)
{
//-- Get the velocities of the launcher and the launch
Vector2 bodyVelocity = m_Body.velocity;
Vector2 launchVelocity = direction * m_LaunchForce;
//-- Decompose the resultant velocity to get the new force and direction
Vector2 resultantVelocity = bodyVelocity + launchVelocity;
resultantForce = resultantVelocity.magnitude;
resultantDirection = resultantVelocity / resultantForce;
}
//-- Generate the launch event
ProjectileLaunchEvent defaultEventInfo = new ProjectileLaunchEvent();
{
defaultEventInfo.launchForce = resultantForce;
defaultEventInfo.launchDirection = new Vector2(resultantDirection.x, resultantDirection.y);
defaultEventInfo.gravityScale = Mathf.Sign(ResolveLauncherScaleY());
}
//-- Give the subclass (if any) a chance to modify the default launch event
ConfigureDefaultLaunchEvent(defaultEventInfo);
return(defaultEventInfo);
}
