在该段代码中加入player触碰地面就改变player与地面接触部分为红色并在跳起后恢复原材质功能：using System;using SystemCollections;using SystemCollectionsGeneric;using UnityEngine;public class PlayerScript MonoBehaviour public Transform fol

using System; using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerScript : MonoBehaviour { public Transform follower; public Renderer playerRenderer; private Rigidbody _playerRigidbody; private Vector3 _controlToGoForward = new Vector3(0, 0, 10); private Vector3 _controlToGoLeft = new Vector3(-10, 0, 0); private Vector3 _controlToGoRight = new Vector3(10, 0, 0); private Vector3 _controlToJump = new Vector3(0, 5, 0); private Vector3 _controlToGoBack = new Vector3(0, 0, -10); private bool _isKeySpaceTyped; private Material _originalMaterial; private Color _originalColor; private Color _contactColor = Color.red;

void Start()
{
    _playerRigidbody = GetComponent<Rigidbody>();
    _originalMaterial = playerRenderer.material;
    _originalColor = playerRenderer.material.color;
}

void Update()
{
    bool isKeyRTyped = Input.GetKey(KeyCode.R);
    bool isKeyTTyped = Input.GetKey(KeyCode.T);
    bool isKeyWTyped = Input.GetKey(KeyCode.W);
    bool isKeyATyped = Input.GetKey(KeyCode.A);
    bool isKeySTyped = Input.GetKey(KeyCode.S);
    bool isKeyDTyped = Input.GetKey(KeyCode.D);
    bool isKeyShiftTyped = Input.GetKey(KeyCode.LeftShift);
    float mouseMoveX = Input.GetAxis("Mouse X");
    float mouseMoveY = Input.GetAxis("Mouse Y");
    float mouseCausedMovedPara = 5;
    _isKeySpaceTyped = Input.GetKey(KeyCode.Space);

    if (isKeyWTyped)
    {
        _playerRigidbody.AddForce(_controlToGoForward);
    }

    if (isKeyATyped)
    {
        _playerRigidbody.AddForce(_controlToGoLeft);
    }

    if (isKeySTyped)
    {
        _playerRigidbody.AddForce(_controlToGoBack);
    }

    if (isKeyDTyped)
    {
        _playerRigidbody.AddForce(_controlToGoRight);
    }

    if (_isKeySpaceTyped)
    {
        _playerRigidbody.AddForce(_controlToJump);
    }

    if (isKeyRTyped)
    {
        transform.position = new Vector3(-20, 68, -30);
    }

    follower.Rotate(-mouseMoveY * mouseCausedMovedPara, mouseMoveX * mouseCausedMovedPara, 0);

    if (isKeyTTyped)
    {
        follower.Rotate(-follower.rotation.x, -follower.rotation.y + 1, -follower.rotation.z);
    }
}

private void OnCollisionEnter(Collision collision)
{
    if (collision.gameObject.CompareTag("Ground"))
    {
        playerRenderer.material.color = _contactColor;
    }
}

private void OnCollisionExit(Collision collision)
{
    if (collision.gameObject.CompareTag("Ground"))
    {
        playerRenderer.material.color = _originalColor;
    }
}