Flashlight GUI and battery pick up.

Question

Hello !

Im working on a game in the dark where you need battery for your flashlight. T$$anonymous$$s is the script for the flashlight.

 var Flashlight : Light; //Connect the light source in the Inspector
 var LightOn : boolean = true;
 var LightDrainSpeed : float = 0.1;
 var BatteryLife : float = 0.0;
 var MaxBatteryLife : float = 1.5;
 
 function Update () {
     if (LightOn && BatteryLife >= 0)
 {
 BatteryLife -= LightDrainSpeed * Time.deltaTime;
 }
 Flashlight.light.intensity = BatteryLife;
 
 if(BatteryLife <= 0)
 {
 Batterylife = 0;
 }
 
 
 if(Input.GetKeyUp(KeyCode.F))
 {
 if(LightOn)
 {
 LightOn = false;
 }
 else if(!LightOn && BatteryLife >= 0)
 {
 LightOn = true;
 }
 
 Lighten();
 
 }
 }
 
 function Lighten(){
 
 if(LightOn)
 {
 Flashlight.light.active = true;
 }
 else
 {
 Flashlight.light.active = false;
 }
 }

I want to make a GUI to show how many percent left to the battery and i want to make a gameObject Battery when you press E the battery life become 100 %. Please and Thank you.

Answer 1

Best Answer

Answer by aldonaletto · Sep 15, 2013 at 02:14 AM

Add t$$anonymous$$s code to your script: it displays the charge in percentage with the GUI system, and also has a function to recharge when the battery is picked up:

 function OnGUI(){
   var charge = 100 * BatteryLife/MaxBatteryLife;
   GUI.Label(Rect(20,20,100,40), charge.ToString("F0")+"%"); 
 }

 function ChargeBattery(){ // function called by battery pickup
   BatteryLife = MaxBatteryLife; // sets full charge
 }

The battery pick up must have a trigger: when the player enters the trigger, its script verifies the key E - if pressed, the pickup charges the flashlight and suicides. The pickup script could be somet$$anonymous$$ng like t$$anonymous$$s:

EDITED: Oops! My bad: the event should be OnTriggerStay!

 function OnTriggerStay(other: Collider){
   if (other.tag == "Player" && Input.GetKeyDown("e")){
     // call the function ChargeBattery in the player or its c$$anonymous$$ldren:
     other.BroadcastMessage("ChargeBattery");
     Destroy(gameObject); // destroy the pickup
   }
 }

NOTE: The flashlight script must be attached to the player or to one of its c$$anonymous$$ldren in order to be called by BroadcastMessage.

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TheYoyii · Sep 15, 2013 at 06:19 AM 0

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Thank You ! but for the pick up i put the script on my battery (GameObject) and when i press E in game nothing happen.

aldonaletto · Sep 15, 2013 at 05:56 PM 0

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This depends on the pickup hierarchy: if the pickup item doesn't have a rigidbody, create an empty gameobject, attach this script to it, add a sphere collider and set its Is Trigger field, then child the battery model to the trigger.

TheYoyii · Sep 15, 2013 at 11:03 PM 0

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Ok but now i got this error and i try to fix it put without success

UnityException: Input Key named: E is unknown

aldonaletto · Sep 16, 2013 at 01:20 AM 0

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Oops! It should be "e" instead of "E". Answer fixed.

TheYoyii · Sep 16, 2013 at 09:09 PM 0

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I dont have a error but its dont work. This is wath i have do: Create a empty gamObject, put a sphere collider and ajust the range. Check Trigger and put the script on it. Wath did i do wrong ?

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Flashlight GUI and battery pick up.

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