Wiki: env_global

env_global - Point Entity

The env_global entity provides a way to store global variables — that is, values that can be retrieved and used across level changes. For example, you could use an env_global to have a switch in one level unlock a door in another.

Attributes

Name (targetname) - Name is a general attribute used to identify entities.
Global State to Set (globalstate) - The name of the global variable you want to set the value of. This name is what you need to reference in other entities to be able to read the value.
Trigger Mode (triggermode) - This is the value that the global variable is set to when the env_global is triggered.
- Off (0) - Sets the value to "Off".
- On (1) - Sets the value to "On".
- Dead (2) - Clears the value of the global variable.
- Toggle (3) - Toggles the value between "Off" and "On".
Initial State (initialstate) - If the Set Initial State flag is enabled, the env_global will set the variable to the given value when it first loads.
- Off (0) - Sets the value to "Off".
- On (1) - Sets the value to "On".
- Dead (2) - Clears the value of the global variable.

Flags

Set Initial State - If enabled, the value of the global variable will be set by the env_global when it is first loaded.

Notes

This global variables are mostly read by trigger_auto and multisource entities. See Tutorial: Globals for details on how to effectively use the env_global entity.
Global variables default to "Off". As such, a toggled variable that has not been set will be set to "On".
When setting up and testing the env_global entity, it is very useful to know which global variables are active and what their current states are. You can check on this information by running impulse 104 in the console.

From the VERC Archive

Usage

The env_global seems a bit complicated to use, but it really is quite easy. Here's a brief list of the steps I took in the example map.

In global1.bsp, i've got a button that activates some things. This button has a multisource master specified (button_master).
The button_master multisource has a Global State Master of levelpower. This means that the multisource will not be "on" until the levelpower global variable has a state of "on". You must now walk through a hallway, through a level transition, into the global2.bsp map.
In global2.bsp, i've got a button which targets an env_global.
The env_global has the following properties:
- Name - level_power
- Global State to Set - levelpower
- Trigger Mode - Toggle
- Initial State - On
When the button triggers the env_global, the levelpower global variable is created with its state set to On. Each time the button here is pressed, the state of the levelpower global variable will toggle between On and Off. Make sure the power button is on (you'll be able to tell from the texture of the button whether it is on or off), then walk back down the hallway through the level transition into the room you initially started in.
The button will now be usable, allowing you to turn some things on and off.
You can go back to the other room and turn the power off, or on, as many times as you like.

Example Maps

VERC Archive: envglobal.zip

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env_global Last edited 4 years ago2019-05-19 03:52:57 UTC