/// <summary>
/// Calculates force over a <paramref name="distance"/> using <paramref name="falloffMode"/>
/// </summary>
public static float ProcessFalloff(float distance, ForceFalloffMode falloffMode)
{
switch (falloffMode)
{
case ForceFalloffMode.None:
return(1);
case ForceFalloffMode.Linear:
return(1 / distance);
case ForceFalloffMode.Squared:
return(1 / Mathf.Sqrt(distance));
default:
throw new System.NotImplementedException();
}
}
/// <summary>
/// Will add force from <paramref name="center"/> to all objects within <paramref name="radius"/>
/// </summary>
public static void AddForceAll(Vector2 center, float radius, float force, ForceMode2D forceMode = ForceMode2D.Force, ForceFalloffMode falloffMode = ForceFalloffMode.Linear, int layerMask = Physics2D.DefaultRaycastLayers)
{
int hitCount = Physics2D.CircleCastNonAlloc(center, radius, Vector2.zero, HitBuffer, 0, layerMask);
for (int i = 0; i < hitCount; i++)
{
RaycastHit2D hit = HitBuffer[i];
Vector2 delta = (Vector2)hit.transform.position - center;
if (delta.magnitude == 0)
{
continue;
}
Interactable interactable = hit.collider.GetComponent <Interactable>();
EntityController controller = interactable?.Entity?.EntityController;
float falloff = ProcessFalloff(delta.magnitude, falloffMode);
if (controller != null)
{
controller.AddForce(delta.normalized * force * falloff, forceMode);
}
else if (hit.rigidbody != null)
{
hit.rigidbody.AddForce(delta.normalized * force * falloff, forceMode);
}
}
}
