unity3d 2D游戏，角色移动与跳跃

using UnityEngine;
using System.Collections;

public class HeroColtrol : MonoBehaviour
{
    private Rigidbody2D HeroRd;
    public float MoveSpeed;
    public float JumpHeight;
    void Awake()
    {
        HeroRd = transform.GetComponent<Rigidbody2D>();
    }


    void FixedUpdate()
    {
        float h = Input.GetAxis("Horizontal");
        if (!h.Equals(0))
        {
            HeroRd.velocity = new Vector2(h * MoveSpeed, HeroRd.velocity.y);
        }
        if (Input.GetKeyDown(KeyCode.Space))
        {
            if (HeroRd.velocity.y.Equals(0))
                HeroRd.velocity = new Vector2(HeroRd.velocity.x, JumpHeight);
        }

    }

}

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