rotate a texture2d till 540 degrees with touchmove - unity3d

Question

I have a texture 2d on my gui screen. I want to rotate this texture till +540 and -540 degrees with finger touch rotate. Beyond this limit it should stop rotating.
can any1 help??

Answer 1

I believe that you can't rotate GUI texture. I suppose the best way to do what you want is to assign a plane as a child to camera facing it, and rotate that plane as you want.

Answer 2

public Texture2D steering;
public static TouchControl Instance;
public float angleRotate=0f;
public float carRotation=0f;
public int finger;
private Matrix4x4 savedMatrix;
private float steerAngleRad;
public float steerAngleDeg;
private float steerAngleRadTemp;
public float steerAngleDegTemp;
private float dx=0f;
private float dy=0f;
private int i;
private float newAngle =0f;
private float initAngle;
private float rotationLimit=540f;
public float secondWheelRot=0f;
private float preRotDeg=0f;
private float angleDiff=0f;
private bool clockWheel=false;
private bool onlyOnce=false;
private Vector2 steeringPos;
private Vector2 centre;
private bool inXRange=false;
private bool inYRange=false;
// private bool moving=false;
private float steeringWidth=0f;
private float steeringHeight=0f;
private float gobackSpeed=20f;
void Start()
{
Instance=this;
i=0;
finger=3;
steeringPos=new Vector2(Screen.width*0.025f,Screen.height*0.68f);
steeringWidth=Screen.width*0.12f;
steeringHeight=steeringWidth;
centre = new Vector2(steeringPos.x + steeringWidth / 2, steeringPos.y + steeringHeight / 2);
}
void Update()
{
if(Input.touchCount>0 && (!PauseButton.pauseFlag && !DamageBar.Instance.levelLost && !GameTimer.Instance.levelLost && !CommonIndicator.Instance.levelComplete))
{
for(i=0;i< Input.touchCount; ++i)
{
if(Input.GetTouch(i).position.x > 0f && Input.GetTouch(i).position.x < steeringWidth+Screen.width*0.1f)
{
inXRange=true;
}
else
{
inXRange=false;
}
if(Input.GetTouch(i).position.y > 0f && Input.GetTouch(i).position.y < Screen.height-(steeringPos.y))
{
inYRange=true;
}
else
{
inYRange=false;
}
///////////////if touch is in the range/////////////////////
if(inXRange && inYRange)
{
if(Input.GetTouch(i).phase==TouchPhase.Began)
{
finger=Input.touches[i].fingerId;
dx=Input.GetTouch(i).position.x-centre.x;
dy=Input.GetTouch(i).position.y-(Screen.height-centre.y);
steerAngleRadTemp=Mathf.Atan2(dy,dx);
steerAngleDegTemp=-steerAngleRadTemp*Mathf.Rad2Deg;
}
if((Input.GetTouch(i).phase==TouchPhase.Stationary || Input.GetTouch(i).phase==TouchPhase.Moved))
{
preRotDeg=newAngle;
if(preRotDeg<-180f && preRotDeg>-360f)
{
preRotDeg+=360f;
}
if(preRotDeg>180f && preRotDeg<360f)
{
preRotDeg-=360f;
}
dx=Input.GetTouch(i).position.x-centre.x;
dy=Input.GetTouch(i).position.y-(Screen.height-centre.y);
steerAngleRad=Mathf.Atan2(dy,dx);
steerAngleDeg=-steerAngleRad*Mathf.Rad2Deg;
angleRotate=steerAngleDeg-steerAngleDegTemp;
newAngle=angleRotate;
if(newAngle<-180f && newAngle>-360f)
{
newAngle+=360f;
}
if(newAngle>180f && newAngle<360f)
{
newAngle-=360f;
}
if(!onlyOnce)
{
onlyOnce=true;
if(newAngle>preRotDeg)
clockWheel=true;
else
clockWheel=false;
}
if(clockWheel && preRotDeg>0f && newAngle < 0f)
{
clockWheel=true;
}
else if(clockWheel && preRotDeg<0f && newAngle >0f)
{
clockWheel=true;
}
else if(!clockWheel && preRotDeg>0f && newAngle <0f)
{
clockWheel=false;
}
else if(!clockWheel && preRotDeg<0f && newAngle >0f)
{
clockWheel=false;
}
else if(newAngle>preRotDeg)
{
clockWheel=true;
}
else if(newAngle<preRotDeg)
{
clockWheel=false;
}
if(Mathf.Abs(newAngle)>Mathf.Abs(preRotDeg))
{
angleDiff=Mathf.Abs(newAngle)-Mathf.Abs(preRotDeg);
}
else
{
angleDiff=Mathf.Abs(preRotDeg)-Mathf.Abs(newAngle);
}
if(clockWheel)
{
carRotation+=angleDiff;
secondWheelRot+=angleDiff;
if(secondWheelRot>rotationLimit)
{
secondWheelRot=rotationLimit;
}
}
else
{
carRotation-=angleDiff;
secondWheelRot-=angleDiff;
if(secondWheelRot<-rotationLimit)
{
secondWheelRot=-rotationLimit;
}
}
}
// else
// {
// steeringToZero();
// }
if(Input.GetTouch(i).phase==TouchPhase.Ended)// && Input.touches[i].fingerId != AccControl.Instance.finger)
{
onlyOnce=false;
carRotation=0f;
angleRotate=0f;
newAngle=0f;
steeringToZero();
finger=3;
}
}
else if(!AccControl.Instance.onPadTouch && finger==3)
{
steeringToZero();
}
}
}
else if(Input.touchCount==0)
{
steeringToZero();
}
if(Input.touchCount==1 && AccControl.Instance.onPadTouch)
{
steeringToZero();
}
if (Input.GetKeyDown(KeyCode.Escape) && !PauseButton.pauseFlag)
{
Application.LoadLevel("MainMenu");
}
}
void steeringToZero()
{
if(secondWheelRot>0)
{
secondWheelRot-=gobackSpeed/(Input.touchCount+1);
}
else if(secondWheelRot<0)
{
secondWheelRot+=gobackSpeed/(Input.touchCount+1);
}
if(secondWheelRot<gobackSpeed && secondWheelRot>-gobackSpeed)
{
secondWheelRot=0f;
}
}
void OnGUI()
{
savedMatrix = GUI.matrix;
GUIUtility.RotateAroundPivot(carRotation,centre);
GUI.DrawTexture(new Rect(steeringPos.x,steeringPos.y, steeringWidth, steeringHeight), steering);
GUI.matrix = savedMatrix;
}