自 Unity 5 以来，跳跃光线投射 isGrounded 无法正常工作

Question

我刚才问了一个问题，关于光线投射让玩家在接触地面时跳跃，我得到了很大的帮助并解决了我的问题。自从将我的项目更新到 Unity 5 后，我的播放器不再跳转并且关于它的 if 语句永远不会运行:

if(Physics.Raycast(ray, rayDistance, 1 << 8))

我不确定为什么会这样，在回到我上一个回答的问题后，我无法解决这个问题。如果有人能提供帮助，我将不胜感激，因为我对 Unity 和 C# 还比较陌生。谢谢

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {

// Update is called once per frame
void FixedUpdate() {

    // Creating floats to hold the speed of the plater
    float playerSpeedHorizontal = 4f * Input.GetAxis ("Horizontal");
    float playerSpeedVertical = 4f * Input.GetAxis ("Vertical");


    //Vector3 velocity = transform.forward * playerSpeedVertical + transform.right * playerSpeedHorizontal;
    //velocity.Normalize();
    //velocity *= playerMaxSpeed;
    //velocity.y = rigidbody.velocity.y;
    //rigidbody.velocity = velocity;

    // Transform statements to move the player by the playerSpeed amount.
    transform.Translate (Vector3.forward * playerSpeedVertical * Time.deltaTime);
    transform.Translate (Vector3.right * playerSpeedHorizontal * Time.deltaTime);

    // Calling the playerJump function when the jump key is pressed
    if (Input.GetButton("Jump"))
    {
        playerJump();
    }
}

/// Here we handle anything to do with the jump, including the raycast, any animations, and the force setting it's self.
void playerJump() {

    const float JumpForce = 1.75f;
    Debug.Log ("Should Jump");

    Vector3 rayOrigin = transform.position;
    rayOrigin.y += GetComponent<Collider>().bounds.extents.y; //move the ray origin up into the collider so that it won't begin in the ground / floor
    float rayDistance = GetComponent<Collider>().bounds.extents.y + 0.1f;

    Ray ray = new Ray ();
    ray.origin = rayOrigin;
    ray.direction = Vector3.down;

    if(Physics.Raycast(ray, rayDistance, 1 << 8)) {
        Debug.Log ("Jumping");
        GetComponent<Rigidbody>().AddForce (Vector3.up * JumpForce, ForceMode.VelocityChange);
    }
}
}

Answer 1

以前，您的代码依赖于游戏对象的位置与其边界中心是否相同。有可能当你更新到unity5时这可能已经改变了，但可能还有其他原因。

解决方案是从边界的中心检查，而不是从对象的中心（它的位置）检查。因为您使用 bounds.extents 来获取从边界中心到边界边缘的距离，所以如果边界中心和游戏对象中心不同，那将不再有效。

这是应该执行此操作的更改代码：

/// Here we handle anything to do with the jump, including the raycast, any animations, and the force setting it's self.
void playerJump() {

    const float JumpForce = 1.75f;
    Debug.Log ("Should Jump");

    Vector3 rayOrigin = GetComponent<Collider>().bounds.center;

    float rayDistance = GetComponent<Collider>().bounds.extents.y + 0.1f;
    Ray ray = new Ray ();
    ray.origin = rayOrigin;
    ray.direction = Vector3.down;
    if(Physics.Raycast(ray, rayDistance, 1 << 8)) {
        Debug.Log ("Jumping");
        GetComponent<Rigidbody>().AddForce (Vector3.up * JumpForce, ForceMode.VelocityChange);
    }
}
}

自 Unity 5 以来，跳跃光线投射 isGrounded 无法正常工作

Jump raycasting isGrounded not working properly since Unity 5

c#

collision

unity3d

raycasting