Unity 3D – Hide Mouse Cursor
1. Load a Scene
2. Select MainCamera, assign HideCursor.JS
#pragma strict
function Start () {
// Hide the cursor
Screen.showCursor = false;
}
function Update () {
}
3. Build it and run
NOTICE: If you try the game during production you will see the mouse cursor! You have to build to see the final result!
Unity 3D Game Engine – Frames per Seconds – JavaScript
1. Create GUIText and attach:
// Attach this to a GUIText to make a frames/second indicator.
//
// It calculates frames/second over each updateInterval,
// so the display does not keep changing wildly.
//
// It is also fairly accurate at very low FPS counts (<10).
// We do this not by simply counting frames per interval, but
// by accumulating FPS for each frame. This way we end up with
// correct overall FPS even if the interval renders something like
// 5.5 frames.
var updateInterval = 0.5;
private var accum = 0.0; // FPS accumulated over the interval
private var frames = 0; // Frames drawn over the interval
private var timeleft : float; // Left time for current interval
function Start()
{
if( !guiText )
{
print ("FramesPerSecond needs a GUIText component!");
enabled = false;
return;
}
timeleft = updateInterval;
}
function Update()
{
timeleft -= Time.deltaTime;
accum += Time.timeScale/Time.deltaTime;
++frames;
// Interval ended - update GUI text and start new interval
if( timeleft <= 0.0 )
{
// display two fractional digits (f2 format)
guiText.text = "" + (accum/frames).ToString("f2");
timeleft = updateInterval;
accum = 0.0;
frames = 0;
}
}
Unity 3D – Drag to Rotate GameObject
1. Create a Cube, assign RotateObject.js:
var clickPos : Vector2;
var offsetPos : Vector2;
var divider = 80;
function Start()
{
clickPos = Vector2(0,0);
offsetPos = Vector2(0,0);
}
function Update () {
offsetPos = Vector2(0,0);
if(Input.GetKeyDown(leftClick()))
{
clickPos = mouseXY();
}
if(Input.GetKey(leftClick()))
{
offsetPos = clickPos - mouseXY();
}
// Rotate the GameObject
transform.Rotate(Vector3(-(offsetPos.y/divider),offsetPos.x/divider,0.0), Space.World);
}
// Debug Code: Prints the current mouse position
function OnGUI ()
{
/*GUI.Label(Rect(10,350,200,100), "mouse X = " + Input.mousePosition.x);
GUI.Label(Rect(10,370,200,100), "mouse Y = " + Input.mousePosition.y);
GUI.Label(Rect(120,350,200,100), "click X = " + clickPos.x);
GUI.Label(Rect(120,370,200,100), "click Y = " + clickPos.y);
GUI.Label(Rect(210,350,200,100), "offset X = " + offsetPos.x);
GUI.Label(Rect(210,370,200,100), "offset Y = " + offsetPos.y);*/
}
// Return true when left mouse is clicked or hold
function leftClick()
{
return KeyCode.Mouse0;
}
//Immediate location of the mouse
function mouseXY()
{
return Vector2(Input.mousePosition.x, Input.mousePosition.y);
}
//Immediate location of the mouse's X coordinate
function mouseX()
{
return Input.mousePosition.x;
}
//Immediate location of the mouse's Y coordinate
function mouseY()
{
return Input.mousePosition.y;
}
Unity 3D Game Engine – Camera Facing Billboard
This is useful for billboards which should always face the camera and be the same way up as it is.
1. Hierarchy create the structure:
– Main Camera
– Empty Object (parent)
– Plane (child)
2. Rotate Plane to face the Main Camera
3. Select Empty Object and assign CameraFacingBillboard.JS:
#pragma strict
var m_Camera : Camera ; // Assign in Inspector
function Start () {
}
function Update () {
transform.LookAt(transform.position + m_Camera.transform.rotation * Vector3.forward,
m_Camera.transform.rotation * Vector3.up);
}
4. Hierarchy> DRAG AND DROP Main Camera over Inspector> CameraFacingBillboard.JS, Camera var
5. Run to see the final result
Original Article: http://wiki.unity3d.com/index.php?title=CameraFacingBillboard
Unity 3D Game Engine – JS – Basics – GameObjects – Get
A good practice is to check the properties of external GameObjects using JS.
Now, using a script inside an Empty Object we will drive other GameObjects.
Follow this steps:
1. store the GameObject inside a variable: var myobject : GameObject;
2. DRAG AND DROP from Hierarchy to Inspector var slot the object
3. Code it:
varname.property = ….
varname.component.property = …
See the JavaScript:
var myobject : GameObject; // ASSIGN IN INSPECTOR!!!!!!!
function Update () {
// NOTICE: varname.property = ....
myobject.transform.Rotate(Vector3.back, 30f * Time.deltaTime);
// NOTICE: varname.component.property = ....
myobject.renderer.material.color.a = 0.5; // set transparency to 50%
}
See API documentation at: http://docs.unity3d.com/ScriptReference/index.html
Let’s go on!
0. Project window> RMB> Import New Asset:
– Audio Clip
1. MAIN TOP MENU> GameObject> Create:
– Main Camera
– Point Light
– GUIText
– Cube
-> Transform
-> Mesh Filter
-> Box Collider
-> Mesh Renderer> add ‘material1’ (Transparent/Diffuse Shader)
-> Particle System
2. Create Empty Object, name it ‘Game Controller’
-> Audio Source without audio clip
->’GameController.JS’
#pragma strict
// create var to get some external GameObjects START #################
// ASSIGN IN INSPECTOR
var mytext : GUIText;
var myobject : GameObject;
var mycamera : Camera;
var mylight : Light;
var myaudio : AudioClip;
// create var to get some external GameObjects END ###################
function Start () {
// instantiate objects at x=0 y=0 z=0, Quaternion.identity-> it means no rotation
// You can use a prefab
// Start() will be executed only once -> it will create only one clone
Instantiate (myobject, new Vector3(0f,0f,0f), Quaternion.identity);
// play audio clip at volume 0.7
audio.PlayOneShot(myaudio, 0.7);
}
function Update () {
// change the property .text of GUIText
// NOTICE: varname.property = ....
mytext.text = "Change this properties using scripts!";
// rotate game object
// NOTICE: varname.property = ....
myobject.transform.Rotate(Vector3.back, 30f * Time.deltaTime);
// translate game object
myobject.transform.Translate(new Vector2(1,0)* 1f *Time.deltaTime);
// set transparency
// NOTICE: varname.component.property = ....
myobject.renderer.material.color.a = 0.5; // set transparency to 50%
// set particle system start color
myobject.particleSystem.startColor = Color.cyan;
// disable collider
myobject.collider.enabled = false;
// change light color
mylight.light.color = Color.red;
// change camera skybox color
mycamera.camera.backgroundColor = Color.green;
} // end Update() #######################################################
3. Hierarchy DRAG AND DROP:
– Main Camera over Inspector mycamera variable
– Point Light over Inspector mylight variable
– Gui Text over Inspector mytext variable
– Cube over Inspector myobject variable
– Audio Clip over Inspector myaudio variable
4. Play
