/*
* Executes the redirection according to the chosen curve and path by
* calculating a position and orientation for the virtual camera.
* */
private void doRedirection()
{
// Set offset transforms (virtual position/orientation is set to zero)
orientationOffset.localRotation = Quaternion.Inverse(UnityEngine.VR.InputTracking.GetLocalRotation(UnityEngine.VR.VRNode.Head));
positionOffset.localPosition = -UnityEngine.VR.InputTracking.GetLocalPosition(UnityEngine.VR.VRNode.Head);
// Get current position and rotation (data from tracking system)
Vector2 realWorldCurrentPosition = switchDimensions(Camera.main.transform.localPosition);
Quaternion realWorldCurrentRotation = Camera.main.transform.localRotation;
//Debug.Log("Current: " + realWorldCurrentPosition);
int pathIndex = data.getPathIndex(currentJoint, currentCurve);
// Calculate distance between real world current position and real world circle center point
float distance = Vector2.Distance(realWorldCurrentPosition, switchDimensions(currentCurve.getCircleCenter()));
//Debug.Log("Distance: " + distance);
// Calculate angle between start and current position
//float angleWalkedOnRealCircle = Vector2.Angle(switchDimensions(switchDimensions(currentJoint.getPosition() + redirectionDirection*data.calculateOffset(currentJoint.getPosition(), currentCurve.getCircleCenter()) - currentCurve.getCircleCenter())), realWorldCurrentPosition - switchDimensions(currentCurve.getCircleCenter()));
Vector3 realWalkingStartPosition = currentJoint.getWalkingStartPosition(pathIndex);
angleWalkedOnRealCircle = Mathf.Acos((Vector2.Dot((switchDimensions(currentCurve.getCircleCenter()) - switchDimensions(realWalkingStartPosition)), (switchDimensions(currentCurve.getCircleCenter()) - realWorldCurrentPosition))) / ((switchDimensions(currentCurve.getCircleCenter()) - switchDimensions(realWalkingStartPosition)).magnitude * (switchDimensions(currentCurve.getCircleCenter()) - realWorldCurrentPosition).magnitude));
//Debug.Log("angleWalkedOnRealCircle: " + angleWalkedOnRealCircle);
// Multiply angle and radius = walked distance
float walkedDistance = angleWalkedOnRealCircle * currentCurve.getRadius();
//Debug.Log("Walked: " + walkedDistance);
// Calculate side drift: d-r
float sideDrift = distance - currentCurve.getRadius();
//Debug.Log("Side: " + sideDrift);
// Calculate angle on virtual circle
angleWalkedOnVirtualCircle = walkedDistance / currentPath.getRadius();
//Debug.Log("angleWalkedOnVirtualCircle: " + angleWalkedOnVirtualCircle);
// Calculate direction from virtual circle center to intersection // - redirectionDirection*data.calculateOffset(currentIntersection.getPosition(), currentPath.getCircleCenter())
Vector3 virtualWalkingStartPosition = currentIntersection.getWalkingStartPosition(pathIndex);
Vector2 directionToIntersection = switchDimensions(virtualWalkingStartPosition - currentPath.getCircleCenter()).normalized;
//Debug.Log("directionToIntersection: " + directionToIntersection);
// Calculate direction to virtual position by rotating direction by angle walked
Vector3 directionToVirtualPosition = Quaternion.AngleAxis(redirectionDirection * angleWalkedOnVirtualCircle * Mathf.Rad2Deg, Vector3.up) * new Vector3(directionToIntersection.x, 0, directionToIntersection.y);
// Multiply direction by radius + side drift
directionToVirtualPosition = directionToVirtualPosition * (currentPath.getRadius() + sideDrift);
//Debug.Log("virtualPosition: " + virtualPosition);
// Calculate and set virtual position
this.transform.position = new Vector3(currentPath.getCircleCenter().x + directionToVirtualPosition.x, Camera.main.transform.localPosition.y, currentPath.getCircleCenter().z + directionToVirtualPosition.z);
//Debug.Log(this.transform.position);
// Calculate and set virtual rotation: redirection + current camera rotation + old rotation
float redirection = Mathf.Rad2Deg * -redirectionDirection * (angleWalkedOnRealCircle - angleWalkedOnVirtualCircle);
float y = redirection + realWorldCurrentRotation.eulerAngles.y + oldRotation;
Quaternion virtualRotation = Quaternion.Euler(realWorldCurrentRotation.eulerAngles.x, y, realWorldCurrentRotation.eulerAngles.z);
this.transform.rotation = virtualRotation;
}
