For this tutorial we will make a door that can only be opened once the player has picked up a key card.
First lets set up the situation. Make a room with a door leading to the high security area where the player wants to be.
Now tie your door to
func_door and
name it
Door1 and remove the check for the
Touch Opens flag.
Key Card
Next we will make the key card that will unlock the door. I am going to use a
prop_physics with the
model models/Items/battery.mdl for the key- you can use what ever you want, though.
Name your key card
Key1.
Now create a brush around your key card and cover it with the
trigger texture. Tie that brush to
trigger_once. Name it
Door1_trigger and set its
parent to
Key1.
Once you have done that we will make the button that will open the door. I placed a
models/props_lab/keypad.mdl as my button prop and I have placed a brush with the nodraw texture on it over the keypad. This brush will act as the button. Tie the brush to a
func_button.
Name it
Door1_button and check the
Starts locked and
Don't move flags.
For effect set a
locked Sound and
Unlocked sound, I chose the
Access Denied/Granted sounds.
Here is the layout
Now lets set up the Inputs/Outputs:
Door1_trigger
Output =
OnTrigger,
Target =
Key1,
Input =
Kill
Output =
OnTrigger,
Target =
,Door1_button,
Input =
Unlock
Door1_button
Output =
OnPressed,
Target =
Door1,
Input =
Open
That is it! Once the player "picks up" the key he will be able to open the locked door.
Now that you made that work, let's jazz it up a bit. We are going to make a text message pop up and a sound play once the key has been picked up.
First make a
game_text.
Name it
Key1_text and set the
Message Text to say something like
You found the blue key.
Then make a
ambient_generic and
name it
Key1_sound. Pick a sound and change the settings until they please you.
Now go back to the Door1_trigger and add:
Output =
OnTrigger,
Target =
Key1_sound,
Input =
PlaySound
Output =
OnTrigger,
Target =
Key1_text,
Input =
Display
Now you have a working key card system in your map. This method will
only work in single player maps.
Grab the example map here
