using UnityEngine;
using System.Collections;
[RequireComponent(typeof(CharacterController))]
[AddComponentMenu("Character/Platform Input Controller")]
public class PlatformInputController : MonoBehaviour {
public bool autoRotate = true;
public float  maxRotationSpeed = 360;
private CharacterMotor motor ;
// Use this for initialization
void Awake () {
    motor = GetComponent<CharacterMotor>();
}
// Update is called once per frame
void Update () {
    // Get the input vector from kayboard or analog stick
    Vector3 directionVector = new Vector3(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"), 0);
    if (directionVector != Vector3.zero) {
        // Get the length of the directon vector and then normalize it
        // Dividing by the length is cheaper than normalizing when we already have the length anyway
        var directionLength = directionVector.magnitude;
        directionVector = directionVector / directionLength;
        // Make sure the length is no bigger than 1
        directionLength = Mathf.Min(1, directionLength);
        // Make the input vector more sensitive towards the extremes and less sensitive in the middle
        // This makes it easier to control slow speeds when using analog sticks
        directionLength = directionLength * directionLength;
        // Multiply the normalized direction vector by the modified length
        directionVector = directionVector * directionLength;
    }
    // Rotate the input vector into camera space so up is camera's up and right is camera's right
    directionVector = Camera.main.transform.rotation * directionVector;
    // Rotate input vector to be perpendicular to character's up vector
    var camToCharacterSpace = Quaternion.FromToRotation(-Camera.main.transform.forward, transform.up);
    directionVector = (camToCharacterSpace * directionVector);
    // Apply the direction to the CharacterMotor
    motor.inputMoveDirection = directionVector;
    motor.inputJump = Input.GetButton("Jump");
    // Set rotation to the move direction    
    if (autoRotate && directionVector.sqrMagnitude > 0.01) {
        Vector3 newForward  = ConstantSlerp(
            transform.forward,
            directionVector,
            maxRotationSpeed * Time.deltaTime
        );
        newForward = ProjectOntoPlane(newForward, transform.up);
        transform.rotation = Quaternion.LookRotation(newForward, transform.up);
    }
}
Vector3 ProjectOntoPlane (Vector3 v, Vector3 normal) {
    return v - Vector3.Project(v, normal);
}
Vector3 ConstantSlerp (Vector3 from, Vector3 to, float angle) {
    float value = Mathf.Min(1, angle / Vector3.Angle(from, to));
    return Vector3.Slerp(from, to, value);
}
}