MouseOrbit Customization: Place camera on spot orbit - unity3d

Question

I have a MouseOrbit script based on the Standard Assets Script that I need to customize to place the camera in a specific spot in the orbit.
Heres the basics of the standard script that ships with Unity3d:
function Start () {
var angles = transform.eulerAngles;
x = angles.y;
y = angles.x;
// Make the rigid body not change rotation
if (rigidbody)
rigidbody.freezeRotation = true;
}
function onUpdate(){
x += Input.GetAxis("Mouse X") * xSpeed;
y -= Input.GetAxis("Mouse Y") * ySpeed;
var rotation = Quaternion.Euler(y, x,0);
var position = rotation * Vector3(0.0, 0.0, cameraDelta);
transform.rotation = rotation;
transform.position = position;
}
What I need to do is place the camera in a few spots around the target object at 0,0.
The first is directly behind the object. x:7,:y0,z:0.
Here's what I thought would work:
function TransformCamera(x,y,z){
//set position of camera
transform.position = new Vector3(x, y, z);
var angles = transform.eulerAngles;
y = angles.y;
x = angles.x;
z = angles.z;
var rotation = Quaternion.Euler(y, x, z);
var position = rotation * Vector3(0.0, 0.0, cameraDelta);
//adjusted_target;
transform.rotation = rotation;
transform.position = position;
}
This script is close... it transforms the camera and rotates it to look at the object, but it doesn't place the camera in the correct location 7,0,0.
Thanks!

Answer 1

Try this modified script. i hope this will solve your problem.
using UnityEngine;
using System.Collections;
public class OrbitCamera : MonoBehaviour
{
//The target of the camera. The camera will always point to this object.
public Transform _target;
//The default distance of the camera from the target.
private float _distance ;
//Control the speed of zooming and dezooming.
public float _zoomStep = 1.0f;
//The speed of the camera. Control how fast the camera will rotate.
public float _xSpeed = 1f;
public float _ySpeed = 1f;
//The position of the cursor on the screen. Used to rotate the camera.
private float _x = 0.0f;
private float _y = 0.0f;
//Distance vector.
private Vector3 _distanceVector;
/**
* Move the camera to its initial position.
*/
void Start ()
{
_distanceVector = new Vector3(0.0f,0.0f,-this.transform.position.z);
_distance = this.transform.position.z;
Vector2 angles = this.transform.localEulerAngles;
_x = angles.x;
_y = angles.y;
this.Rotate(_x, _y);
}
/**
* Rotate the camera or zoom depending on the input of the player.
*/
void LateUpdate()
{
if ( _target )
{
this.RotateControls();
this.Zoom();
}
}
/**
* Rotate the camera when the first button of the mouse is pressed.
*
*/
void RotateControls()
{
if ( Input.GetButton("Fire1") )
{
_x += Input.GetAxis("Mouse X") * _xSpeed;
_y += -Input.GetAxis("Mouse Y")* _ySpeed;
this.Rotate(_x,_y);
}
}
/**
* Transform the cursor mouvement in rotation and in a new position
* for the camera.
*/
void Rotate( float x, float y )
{
//Transform angle in degree in quaternion form used by Unity for rotation.
Quaternion rotation = Quaternion.Euler(y,x,0.0f);
//The new position is the target position + the distance vector of the camera
//rotated at the specified angle.
Vector3 position = rotation * _distanceVector + _target.position;
//Update the rotation and position of the camera.
transform.rotation = rotation;
transform.position = position;
}
/**
* Zoom or dezoom depending on the input of the mouse wheel.
*/
void Zoom()
{
if ( Input.GetAxis("Mouse ScrollWheel") < 0.0f )
{
this.ZoomOut();
}
else if ( Input.GetAxis("Mouse ScrollWheel") > 0.0f )
{
this.ZoomIn();
}
}
/**
* Reduce the distance from the camera to the target and
* update the position of the camera (with the Rotate function).
*/
void ZoomIn()
{
_distance -= _zoomStep;
_distanceVector = new Vector3(0.0f,0.0f,-_distance);
this.Rotate(_x,_y);
}
/**
* Increase the distance from the camera to the target and
* update the position of the camera (with the Rotate function).
*/
void ZoomOut()
{
_distance += _zoomStep;
_distanceVector = new Vector3(0.0f,0.0f,-_distance);
this.Rotate(_x,_y);
}
} //End class