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Unity 3D Game Engine – JS – Camera – Swap Multi Cameras – On Click

1. Create in the Hierarchy

– CameraTarget1 (Empty object)
– CameraTarget2 (Empty object)

– Main Camera> attach ‘CameraControl.js’

CameraControl.js:

#pragma strict

// ########################################################################################
// This complete script can be attached to a camera to change his Position and his Target
// You will move the camera by clicking GUI.Button CAMERA 1 and GUI.Button CAMERA 2
// ########################################################################################

// The relative speed at which the camera will catch up
// Small value = more steps to reach the new position
public var smooth : float = 1.5f;  

// Camera positions START ##################################################################
public var newPosCam1 : Vector3;   // Camera Position 1 
public var newPosCam2 : Vector3;   // Camera Position 2 
// Camera positions END ####################################################################

// Camera targets START ####################################################################
// The target variable shows up as a property in the inspector. 
// Drag another object onto it to make the camera look at it.
var target1 : Transform; 
var target2 : Transform;
// Camera targets END ######################################################################

function Start () {

}


function Update() {
	
}

// NOTICE: function OnGUI is outside others functions
// Move the Camera START ###################################################################	
function OnGUI () {
    // Button color and opacity setup START ################################################
    // 0.0f rende il bottone completamente trasparente, il tocco funziona ugualmente
    GUI.color = new Color(1,1,1,0.5f); 
    // Button color and opacity setup END ##################################################
    
    // Insert 8 pixels of space between the 2 buttons.
	GUILayout.Space (8);

   if (GUI.Button (Rect (600,10,200,200), "CAMERA 1")) {
        transform.position = Vector3.Lerp(transform.position, newPosCam1, smooth * Time.deltaTime);
        transform.LookAt(target2);
    }
   if (GUI.Button (Rect (600,250,200,200), "CAMERA 2")) {
        transform.position = Vector3.Lerp(transform.position, newPosCam2, smooth * Time.deltaTime);
        transform.LookAt(target1);
    }
}
// Move the Camera END #####################################################################

Main Camera> CameraControl.js:

– var Smoot: Small value = more steps to reach the new position

– New Pos Cam 1: first position of camera
– New Pos Cam 2: second position of camera

– Target 1: target of first position -> DRAG AND DROP from Hierarchy to Inspector CameraTarget1 (Empty object)
– Target 2: target of second position -> DRAG AND DROP from Hierarchy to Inspector CameraTarget2 (Empty object)

Unity 3D – JS Script – Screen Fader

1. MAIN TOP MENU> GameObject> Create Other> GUI TEXTURE> Inspector, rename it ‘ScreenFader’
2. Inspector> Transform> Position X=0 Y=0 Z=0 (così viene posizionata in basso a sinistra dello schermo)
3. Pixel Inset, X=0 Y=0 W=0 H=0 (non vogliamo che ci siano dei rientri)
4. Inspector> GUI Texture> DRAG E DROP a black bitmap Texture
5. Assign to ‘ScreenFader’ GameObject this JS Script:

SceneFadeInOut.js

#pragma strict

public var fadeSpeed : float = 1.5f;            // Speed that the screen fades to and from black.
private var sceneStarting : boolean = true;     // Whether or not the scene is still fading in.

function Awake ()
{
    // Set the texture so that it is the size of the screen and covers it.
    // Per prima cosa ricopro tutto lo schermo creando un rettangolo di dimensione dello schermo
    guiTexture.pixelInset = new Rect(0f, 0f, Screen.width, Screen.height);
}


function Update ()
{
    // If the scene is starting...
    // Controlla il valore booleano -sceneStarting- se è vero esegue le istruzioni all'interno di -if-
    if(sceneStarting)
        // ... call the StartScene function.
        // richiama la funzione
        StartScene();
}


function FadeToClear ()
{
    // Lerp (interpolate 2 values) the colour of the texture between itself and transparent.
    // Esegue un fading - colore della texture -> completamente trasparente -
    guiTexture.color = Color.Lerp(guiTexture.color, Color.clear, fadeSpeed * Time.deltaTime);
}


function FadeToBlack ()
{
    // Lerp (interpolate 2 values) the colour of the texture between itself and black.
    guiTexture.color = Color.Lerp(guiTexture.color, Color.black, fadeSpeed * Time.deltaTime);
}


function StartScene ()
{
    // Fade the texture to clear.
    FadeToClear();
    
    // If the texture is almost clear...
    // Se il colore è quasi completamente trasparente
    if(guiTexture.color.a <= 0.05f)
    {
        // ... set the colour to clear and disable the GUITexture.
        // Rendi il colore completamente trasparente e disabilita la GUI Texture
        guiTexture.color = Color.clear;
        guiTexture.enabled = false;
        
        // The scene is no longer starting.
        // Imposta la variabile booleana a falso per interrompere il ciclo
        sceneStarting = false;
    }
}


public function EndScene ()
{
    // Make sure the texture is enabled.
    guiTexture.enabled = true;
    
    // Start fading towards black.
    FadeToBlack();
    
    // If the screen is almost black...
    if(guiTexture.color.a >= 0.95f)
        // ... reload the level.
        Application.LoadLevel(0);
}

Inspector> SceneFadeInOut.js> ‘Fade Speed’ variable, assign 0.5 (valore basso -> tempo di fading alto)

NOTICE:

Application.LoadLevel(0);

Setup the correct level number, you can find it inside MAIN TOP MENu> File> Build Settings…
If you have only one scene in your project, just reload it -> .LoadLevel(0)

Unity – Spaceship Shooting Game – JS – Audio

Asteroid Explosion

Project> Assets> Audio> explosio_asteroid.wav DRAG AND DROP over Prefabs> VFX> Explosions> explosion_asteroid

Prefabs> VFX> Explosions> explosion_asteroid> Inspector> Audio Source> check ‘Play on Awake’, the wav it will be played automatically.

When the VFX explosion_asteroid is instanced the Audio Sopurce Component will play xplosio_asteroid.wav automatically.

Player Explosion

The same procedure as above

Weapon Player

Project> Assets> Audio> weapon_player.wav DRAG AND DROP over Hierarchy> Player

Hierarchy> Player> Audio Source> uncheck ‘Play on Awake’

Hierarchy> Player> PlayerController.js

#pragma strict

class Boundary
{
    // Theese variables are public to make the code easy-reusable
    // You can setup theese variables from Inspector
    var xMin : float;
    var xMax : float;
    var zMin : float;
    var zMax : float;
}

var speed : float;
var tilt : float;
var boundary : Boundary;

var shot : GameObject;     // Inspector -> assign Bolt Prefab
var shotSpawn : Transform; // Inspector -> assign Shot Spawn Empty Object
var fireRate : float;      // Inspector -> 0.25 (seconds) = 4 shot per second

private var nextFire : float;

function Update () {
    // Get Input Fire button
    if (Input.GetButton("Fire1") && Time.time > nextFire)
    {
        nextFire = Time.time + fireRate;
        // Return the clone of the GameObject, position, rotation if user click Fire button 
        Instantiate(shot, shotSpawn.position, shotSpawn.rotation);
        audio.Play ();
    }
}

function FixedUpdate () {
     // Get User Input START
     var moveHorizontal : float= Input.GetAxis ("Horizontal");
     var moveVertical : float= Input.GetAxis ("Vertical");
     // Get User Input END

     // Move the GameObject
     var movement : Vector3= new Vector3 (moveHorizontal, 0.0f, moveVertical);
    rigidbody.velocity = movement * speed;

    // Limitate movement inside the screen START
    rigidbody.position = new Vector3 
    (
        Mathf.Clamp (rigidbody.position.x, boundary.xMin, boundary.xMax), 
        0.0f, 
        Mathf.Clamp (rigidbody.position.z, boundary.zMin, boundary.zMax)
    );
    // Limitate movement inside the screen END

    // Tilt movement START
    rigidbody.rotation = Quaternion.Euler (0.0f, 0.0f, rigidbody.velocity.x * -tilt);
    // Tilt movement END
}

Notice:

if (Input.GetButton("Fire1")...
...
audio.Play ();
}
...

Audio play… if fire button is pressed!

Background Music

Project> Assets> Audio> music_background.wav DRAG AND DROP over Hierarchy> Game Controller

Hierarchy> Game Controller> Audio Source> check ‘Play on Awake’, check ‘Loop’

Balacing Audio

To setup audio volume open the Audio Source Component> Volume, setup this.