Adding stamina to existing script

Questions & Answers
1

I found a script that adds sprinting, crouching, etc to CharacterMotor.js. Now i’m trying to add a stamina bar and am having difficulty.

sprint.js

var walkSpeed: float = 8;
var crchSpeed: float = 3;
var runSpeed: float = 16;
var stamina : int = 100;

private var chMotor: CharacterMotor;
private var ch: CharacterController;
private var tr: Transform;
private var height: float;

function Start() {
	chMotor = GetComponent(CharacterMotor);
	tr = transform;
	ch = GetComponent(CharacterController);
	height = ch.height;
}

function Update() {
	var h = height;
	var speed = walkSpeed;
	if (ch.isGrounded && Input.GetKey("left shift") || Input.GetKey("right shift")) {
		if (stamina != 0) {
			speed = runSpeed;
			stamina = stamina - 1;
		}
	}
	if (Input.GetKey("left ctrl") || Input.GetKey("right ctrl")) {
		h = 0.5 * height;
		speed = crchSpeed;
	}
	chMotor.movement.maxForwardSpeed = speed;
	var lastHeight = ch.height;
	ch.height = Mathf.Lerp(ch.height, h, 5*Time.deltaTime);
	tr.position.y += (ch.height-lastHeight)/2;
	
	if (stamina != 100) {
			stamina = stamina + 0.5;
		}
}

function OnGUI () {
	GUI.Box(Rect(120,Screen.height - 50, 80, 40), "");
	GUI.Label(Rect(130,Screen.height - 30, 180, 125), stamina + " / " + "100");
	GUI.Label(Rect(130,Screen.height - 50, 180, 125), "Stamina");
}

The GUI and depletion of stamina, works. Recharging stamina, does not work. I would also like to fix stamina decreasing when shift is pressed but the player is not moving.

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15028-1.jpg1919×1033 304 KB

2

check if one of the movement keys are being pressed :

if (ch.isGrounded && Input.GetKey("left shift") || Input.GetKey("right shift")) {
	if (stamina != 0) {
		speed = runSpeed;
		if ( Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D)) {
			stamina = stamina - 1;
		}
	}
}

with the stamina, you are using an integer, therefor you cannot add 0.5, so it doesn’t recharge the stamina. Use an integer value (-2 decrease, +1 increase), or declare stamina as a float.

var stamina : float = 100;

Then check with :

if (stamina < 100) {
    stamina = stamina + 0.5;
}