unity3d

Unity – Time.deltaTime

The time in seconds it took to complete the last frame (Read Only).
Use this function to make your game frame rate independent, and for smoot movements.

#pragma strict

function Update () {
		// Move the object 10 meters per second!
		var translation : float = Time.deltaTime * 10;
		transform.Translate (translation, 0, 0);
	}

Unity – Activating GameObjects

Activate Object

DRAG AND DROP this script over a object in the Hierarchy:

#pragma strict

function Start ()
{
    gameObject.SetActive(false); // Deactivate an object
}

Check State

Create an object in the scene and give it the name ‘GreatObject’

Create this Script and give it the name ‘MyScript’

#pragma strict

public var myObject :GameObject;


function Start ()
{
    Debug.Log("Active Self: " + myObject.activeSelf);
    Debug.Log("Active in Hierarchy" + myObject.activeInHierarchy);
}

1. DRAG AND DROP this script over ‘GreatObject’ in the Hierarchy
2.Select the ‘GreatObject’> Inspector> MyScript> myObject> the slot is ‘None’, on the right ‘Select Game object’ small icon> Scene> select ‘GreatObject’ from the scene, NOW ‘public var myObject = GreatObject’, you will Debug.Log it

NOTICE:

– if you disable a PARENT object also CHILD will be disabled.
– if you disable a CHILD object the PARENT does not change his original status.

Unity – How optimize building

IMAGES

Projects> Assets> select an Image> Inspector> Max Size / Format

SOUND EFX

Projects> Assets> select an Sound EFX> Inspector> Audio Format / Load Type / Compression (kbps)

BUILD

MAIN TOP MENU> File> Build Settings…> ‘Player Settings’ button (inteso come il player Unity)> Inspector

RENDER MODE – 3D SCENES ONLY

– Vertex Lighting
-> fastest
-> it interpolare lighting over the surface of the mesh
-> it NOT allow Normal mapping / Light Cookies / Real Time Shadows

– Per pixel Lighting
-> best quality
-> it calculate lighting in every screen pixel
-> it allow Normal mapping / Light Cookies / Real Time Shadows

Setup:

MAIN TOP MENU> Edit> Project Settings> Quality> Pixel Light Count, maggiore è il valore, maggiore qualità, minore velocità di rendering

Hierarchy> select Light> Inspector> Render Mode> Important (Per pixel Lighting) / Not important (Vertex Lighting)

Unity – Enumerations

Default values:

#pragma strict

// The default values are North=0 East=1 South=2 etc...
enum Direction{North, East, South, West};

function Start () 
{
    var myDirection : Direction;
    
    myDirection = Direction.South; // the result is 2
}

Declared values:

#pragma strict

// The first value can be declared
enum Direction{North=1, East, South, West};

function Start () 
{
    var myDirection : Direction;
    
    myDirection = Direction.South; // the result is 3
}

#pragma strict

// All values can be declared
enum Direction{North = 15, East = 18, South = 34, West = 35};

function Start () 
{
    var myDirection : Direction;
    
    myDirection = Direction.South; // the result is 34
}

#pragma strict

enum Direction{North, East, South, West};

function Start () 
{
    var myDirection : Direction;
    
    myDirection = Direction.North;
}

function ReverseDirection (dir : Direction) : Direction
{
    if(dir == Direction.North)
        dir = Direction.South;
    else if(dir == Direction.South)
        dir = Direction.North;
    else if(dir == Direction.East)
        dir = Direction.West;
    else if(dir == Direction.West)
        dir = Direction.East;
    
    return dir;     
}

Unity – Destroy Components

Removes a gameobject, component or asset.

DESTROY OBJECT

DRAG AND DROP to an object in the Hierarchy

#pragma strict

function Update ()
{
    if(Input.GetKey(KeyCode.Space))
    {
        Destroy(gameObject);
    }
}

Run and press Key to destroy object

DELAY DESTRUCTION

DRAG AND DROP to an object in the Hierarchy

#pragma strict

function Update ()
{
    if(Input.GetKey(KeyCode.Space))
    {
        Destroy(gameObject,3f);
    }
}

Run and press Key to destroy object after 3 seconds ‘3f’

DESTROY OTHER OBJECTS

1. DRAG AND DROP to an object in the Hierarchy

#pragma strict

public var other : GameObject;


function Update ()
{
    if(Input.GetKey(KeyCode.Space))
    {
        Destroy(other);
    }
}

2. Inspector> variable ‘Other’> small icon to select an object to destroy (onother object)

DESTROY COMPONENTS WITHOUT REMOVE OBJECT

1.DRAG AND DROP to an object in the Hierarchy

#pragma strict

function Update ()
{
    if(Input.GetKey(KeyCode.Space))
    {
        Destroy(GetComponent(SpriteRenderer));
    }
}

2. Play, look at ‘Inspector’, and press ‘Space Bar’, the component ‘Sprite Renderer’ will disappear.

DESTROY EVERYTHING AHHH!!!! – EXAMPLES LIST

        // Kills the game object
	Destroy (gameObject);

	// Removes this script instance from the game object
	Destroy (this);

	// Removes the rigidbody from the game object
	Destroy (rigidbody);
	
	// Kills the game object in 5 seconds after loading the object
	Destroy (gameObject, 5);

	// When the user presses Ctrl, it will remove the script 
	// named FooScript from the game object
	function Update () {
		if (Input.GetButton ("Fire1") && GetComponent (FooScript))
			Destroy (GetComponent (FooScript));
	}