AnimatorSpeedMod

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Animator))]
public class AnimatorSpeedMod : MonoBehaviour {

    public float animMod;

    public Animator animator;

    public AnimatorStatesHandler state;

    public Rigidbody rb;

    public float minAnimSpeed = 0.5f, maxAnimSpeed = 2.0f;

    float lastAnimatorMoveTime;

    void Reset()
    {
        if (animator == null)
            animator = GetComponent<Animator> ();

        if (state == null)
            state = GetComponent<AnimatorStatesHandler>();

        if (rb == null)
            rb = GetComponent<Rigidbody >();
    }

    protected virtual void OnAnimatorMove()
    {
        Vector3 dPos = animator.deltaPosition;

        float deltaTime = Time.time - lastAnimatorMoveTime;

        lastAnimatorMoveTime = Time.time;

        Vector3 animatorVelocity = dPos / deltaTime;

        AnimatorStateHandler_Humanoid humanoidState = (AnimatorStateHandler_Humanoid)state;

        if (humanoidState != null && humanoidState.isLanding) {
            animator.speed = 1.0f;
            return;
        }
        if (animatorVelocity.sqrMagnitude > 0.1f && state.isGrounded) {
            float mod = rb.velocity.magnitude / animatorVelocity.magnitude;
            animMod = Mathf.Clamp (mod, minAnimSpeed, maxAnimSpeed);
            animator.speed = animMod;
        } else {
            animator.speed = 1.0f;
        }
    }
}