Stopping A Value From Being Less Than Zero

PROBLEM SOLVED

I had a brain blast shortly after writing this post, but it may be of use to someone someday. All i had to do was move the section of the script that reads:

Code (csharp):

1. if (energyCur< 0){
2.    energyCur= 0;
3.    }
4.  

down into when the shift key is pressed

I also added in a feature to stop the bar from going below zero as well.

Code (csharp):

1. if (scale < 0){
2. scale =0;
3. }

Here is the full code for reference:

UPDATED CODE

Code (csharp):

1. var scale = 1.0f;
2. public var energyStart: float;
3. public var energyCur: float;
4. public var energyMax= 100;
5. public var energyCostPerSecond: float= 1;
6.  
7.    function changeEnergy(Change:float){
8.    energyCur += Change;
9.    if (energyCur> energyMax){
10.    energyCur = 100;}
11. }  
12.  
13. function OnGUI() {
14.     GUI.backgroundColor = Color.yellow;
15.     GUI.Button(Rect(10, 40, 100 * scale, 20), "Energy");
16.    scale = energyCur / energyMax;
17. if (Input.GetKey(KeyCode.LeftShift))
18. {
19.     energyCur -= energyCostPerSecond * Time.deltaTime;
20. if (energyCur< 0){
21.    energyCur= 0;
22.    }
23. if (scale < 0){
24. scale =0;
25. }
26. }
27. }
28.  
29.      function OnControllerColliderHit(hit : ControllerColliderHit) {
30.         if (hit.gameObject.tag == "Player")
31.             return;
32.         Debug.Log("You hit " + hit.gameObject.tag);
33.         if(hit.gameObject.tag == "ground")
34.         {
35.             //Destroy(hit.gameObject);
36.             changeEnergy (1);
37.         }

/*



Hello again,

Im having a minor issue that is really bugging me. I have a javascript file for a regenerating bar, it works fine, and i managed to get it working, but when the bar reaches zero it continues depleting, going into negative values.

the section of my script that has the code:

Code (csharp):

1. function changeEnergy(Change:float){
2.    energyCur += Change;
3.    if (energyCur> energyMax){
4.    energyCur = 100;}
5.    
6. if (energyCur< 0){
7.    energyCur= 0;
8.    }
9. }  

and the full script for reference.

Code (csharp):

1. var scale = 1.0f;
2. public var energyStart: float;
3. public var energyCur: float;
4. public var energyMax= 100;
5. public var energyCostPerSecond: float= 1;
6.  
7.    function changeEnergy(Change:float){
8.    energyCur += Change;
9.    if (energyCur> energyMax){
10.    energyCur = 100;}
11.    
12. if (energyCur< 0){
13.    energyCur= 0;
14.    }
15. }  
16.  
17.  
18. function OnGUI() {
19.     GUI.backgroundColor = Color.yellow;
20.     GUI.Button(Rect(10, 40, 100 * scale, 20), "Energy");
21.      
22.    scale = energyCur / energyMax;
23. if (Input.GetKey(KeyCode.LeftShift))
24. {
25.     energyCur -= energyCostPerSecond * Time.deltaTime;
26. }
27. }
28.     function OnControllerColliderHit(hit : ControllerColliderHit) {
29.         if (hit.gameObject.tag == "Player")
30.             return;
31.         Debug.Log("You hit " + hit.gameObject.tag);
32.         if(hit.gameObject.tag == "ground")
33.         { ;
34.             changeEnergy (1);
35.         }
36.     }

*/

 

Use Mathf.Clamp, like Mathf.Clamp(energyCur,0,energyMax);