> For the complete documentation index, see [llms.txt](https://vsxgames.gitbook.io/universal-vehicle-combat/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vsxgames.gitbook.io/universal-vehicle-combat/resources-system/resource-container-triggers.md).

# Resource Container Triggers

Sometimes, you want to trigger an event a specified time after a certain threshold is crossed, and cancel the event if the value returns to the other side of the threshold.

A prime example is blowing up a vehicle if the heat reaches a certain level and stays above that level for a certain amount of time.

### Creating A Threshold Trigger

To set up a Resource Container threshold trigger:

1. Add a **Resource Container Threshold Trigger** component somewhere on the vehicle or module
2. Set the *Container* in the inspector
3. Add functions from any script (such as a **Detonator** component) to the *On Threshold Crossed* event in the inspector
4. To cancel something when the resource container's value goes back under the threshold, add functions to the *On Threshold Returned* event in the inspector.

### Threshold UI Bar

You may also want to display on a fill bar the amount of the threshold reached (rather than the amount of resource container filled).

To set this up:

1. Create a UI Image and set the *Image Type* to *Filled* (you must set the sprite first, use the *Square\_Bounds* sprite provided).
2. Drag the image into the *Threshold Fill Bar* field in the inspector of the **Resource Container Threshold Trigger** component