【转】用代码实现血条或力量条效果

var fullWidth : float = 256;

 

//create a private variable to store currently created stack of crates

private var currentCrates : GameObject;

 

//create a private variable (not shown in inspector) to store the current set power

private var thePower : float;

 

//create a boolean flag we can use to stop and start the addition to power

private var increasing : boolean = false;

 

//create a boolean flag we can use to stop the player shooting during the shot

private var shooting : boolean = false;

 

//speed to increment the bar

var barSpeed : float = 25;

 

//create a slot to assign my cannonball prefab to.

var ball : Rigidbody;

 

//create a blast particle slot to assign particle emitter to

var blastPart : ParticleEmitter;

 

//create a light slot to assign a light prefab for when the blast occurs

var cannonLight : Light;

 

//create a slot to assign an empty game object as the point to spawn from

var spawnPos : Transform;

 

// create a number to multiply the force by as the value of up to 256 may not be enough to 

// effectively shoot a ball forward

var shotForce : float = 5;

 

//a prefab of some crates to shoot at

var crates : GameObject;

 

//audio for the blast

var cannonBlast : AudioClip;

 

function Start(){

//set the power bar to zero at start

guiTexture.pixelInset.width = 0;

//create the target crate stack, and set currentCrates variable to represent this stack

var someCrates : GameObject = Instantiate(crates, Vector3(10, 15, -8), transform.rotation);

currentCrates = someCrates;

}

 

function Update () {

//if we are not currently shooting and Jump key is pressed down

if(!shooting && Input.GetButtonDown("Jump")){

//play the sound set on the audio source

audio.Play();

//set the increasing part of Update() below to start adding power

increasing=true;

}

// detect if Jump key is released and then call the Shoot function, passing current 

// value of 'thePower' variable into its 'power' argument

if(!shooting && Input.GetButtonUp("Jump")){

//reset increasing to stop charge of the power bar

increasing = false;

//call the custom function below with current value of thePower fed to its argument

Shoot(thePower);

}

if(increasing){

//add to thePower variable using Time.deltaTime multiplied by barSpeed

thePower += Time.deltaTime * barSpeed;

//stop (or 'fight') thePower from exceeding fullWidth using Clamp

thePower = Mathf.Clamp(thePower, 0, fullWidth);

//set the width of the GUI Texture equal to that power value

guiTexture.pixelInset.width = thePower;

//set the pitch of the audio tone to the power var but step it down with division

audio.pitch = thePower/30;

}

}

 

// start the 'Shoot' custom function, and establish a 

// float argument to recieve 'thePower' when function is called

function Shoot(power : float){

//stop shooting occuring whilst currently shooting with this boolean flag

shooting  = true;

//create a particle burst

var pBlast : ParticleEmitter = Instantiate(blastPart, spawnPos.position, spawnPos.rotation);

//base blast amount on power argument, and divide it to diminish power

pBlast.maxEmission = power/4;

//create a light to act as a flash for the blast, base its range & intensity 

//upon the power variable and destroy it after 0.1 seconds

var canLight : Light = Instantiate(cannonLight, spawnPos.position, spawnPos.rotation);

canLight.intensity = power/7;

canLight.range=power/7;

Destroy(canLight.gameObject, 0.1);

//stop the audio source on this object to cut off the tone build up to launch

audio.Stop();

//play the sound of the cannon blast in a new object to avoid interfering

//with the current sound assignment and loop setup

AudioSource.PlayClipAtPoint(cannonBlast, transform.position);

//create a ball, assign the newly created ball to a var called pFab

var pFab : Rigidbody = Instantiate(ball, spawnPos.position, spawnPos.rotation);

//find the forward direction of the object assigned to the spawnPos variable

var fwd : Vector3 = spawnPos.forward;

pFab.AddForce(fwd * power * shotForce);

Destroy(pFab.gameObject, 4);

//pause before resetting everything

yield WaitForSeconds(4);

//reset the bar GUI width and our main power variable

guiTexture.pixelInset.width = 0;

thePower = 0;

//destroy the existing crates and spawn a new stack

Destroy(currentCrates);

var someCrates : GameObject = Instantiate(crates, Vector3(8, 15, -11), transform.rotation);

currentCrates = someCrates;

//allow shooting to occur again

shooting = false;

}