C# IndexOutOfRangeException error

这里有一个轻微的c#问题。我目前正在与Unity一起编写一个小型平台游戏，我进行了一些光线投射，检查了碰撞等。

现在，我开始清理代码，将这些光线投射的结果存储到一个整数数组中，但我得到了IndexOutOfRangeException。

我已经试过多次阅读我的代码，但似乎找不到问题的原因。如果有人能帮我，我会非常高兴。

这是我的代码：

using UnityEngine;
using System.Collections;
public class PlayerRayCaster : MonoBehaviour {
    public float playerHeight = 1;
    public enum FeetState {Air, Ground};
    public FeetState playerFeetState = FeetState.Air;
    public int feetHitRays;
    public int behindHitRay;
    //Arrays of rays. value of 1 means that ray hits a target, 0 means that it does not hit.
    public int[] sideRays; // [0-3] = Left side. [4-8] = Right side.
    public int[] depthRays; // [0] = Away from camera. [1] = Towards camera.
    public int[] feetRays;
    public int counter;
    void Start(){
        sideRays = new int[8];
        depthRays = new int[2];
        feetRays = new int[3];
    }
    // Update is called once per frame
    void Update () {
        FeetRays();
        SideRays();
        BehindRay();
    }
    //Rays, which check if the character is bumping into an object, left or right.
    void SideRays(){
        float rayLength = 0.4f;
        counter = 0;
        //Left side rays.
        for(int rayHeight = 0 ; rayHeight>=-4 ; rayHeight-=1 , counter++){
            Debug.Log(sideRays[counter]);
            if(Physics.Raycast(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(-1,0,0),rayLength)){
                sideRays[counter] = 1;
                Debug.DrawRay(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(-rayLength,0,0), Color.green);
            }
            else{
                sideRays[counter] = 0;
                Debug.DrawRay(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(-rayLength,0,0), Color.yellow);
            }
        }
        //Right side rays.
        for(int rayHeight = 0;rayHeight>=-4;rayHeight-=1,counter++){
            if(Physics.Raycast(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(1,0,0),rayLength)){
                sideRays[counter] = 1;
                Debug.DrawRay(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(rayLength,0,0), Color.green);
            }
            else{
                sideRays[counter] = 0;
                Debug.DrawRay(transform.position-new Vector3(0,rayHeight/2,0), new Vector3(rayLength,0,0), Color.yellow);
            }
        }
    }
    //Three rays, which check if the characters feet are on the ground or not.
    void FeetRays(){
        feetHitRays = 0;
        float rayLength = 0.2f;
        //Shoots three rays down from player.
        for(float i=-0.7f;i<=0.7f;i+=0.7f){
            if(Physics.Raycast(transform.position-new Vector3(i/2,0,0), new Vector3(0,-1,0),rayLength)){
                feetHitRays++;
                Debug.DrawRay(transform.position-new Vector3(i/2,0,0), new Vector3(0,-rayLength,0), Color.green);
            }
            else{
                Debug.DrawRay(transform.position-new Vector3(i/2,0,0), new Vector3(0,-rayLength,0), Color.red);
            }
        }
        //Sets the feet state.
        if(feetHitRays==0)
        {
            playerFeetState = PlayerRayCaster.FeetState.Air;
        }
        else{
            playerFeetState = PlayerRayCaster.FeetState.Ground;
        }       
    }
    //Shoots a raycast in z-direction from the character, to check for door access.
    void BehindRay(){
        behindHitRay = 0;
        float rayLength = 2;
        if(Physics.Raycast(transform.position, new Vector3(0,0,1), rayLength)){ //Away from camera
            behindHitRay = 1;
            Debug.DrawRay(transform.position, new Vector3(0,0,rayLength), Color.green);
        }
        if(Physics.Raycast(transform.position, new Vector3(0,0,-1), rayLength)){ // Towards camera.
            behindHitRay = -1;
            Debug.DrawRay(transform.position, new Vector3(0,0,-rayLength), Color.green);
        }
    }
}

这一行给了我一个例外：

sideRays[counter] = 1;

提前谢谢。

for(int rayHeight = 0 ; rayHeight>=-4 ; rayHeight-=1 , counter++)

sideRays = new int[8];

// Note the > instead of >=
for (int rayHeight = 0; rayHeight > -4; rayHeight--, counter++)