Version: 2017.2

MoveDirection

enumeration

切换到手册

描述

这是一个 8 方向移动枚举。

MoveDirection 提供了一种在移动状态之间切换的方式。您必须将这些状态分配给操作,例如,处于 Up 状态时,通过向上矢量移动游戏对象。

与必须始终包含大量矢量和计算相比,具有此类状态更容易识别。相反,您只需在一个部分中定义希望状态执行的操作,并在需要时切换到相应状态即可。

//This is a full example of how a GameObject changes direction using MoveDirection states
//Assign this script to a visible GameObject (with a Rigidbody attached) to see it in action

using UnityEngine; using UnityEngine.EventSystems;

public class Example : MonoBehaviour { Vector3 m_StartPosition, m_StartForce; Rigidbody m_Rigidbody; //Use Enum for easy switching between direction states MoveDirection m_MoveDirection;

//Use these Vectors for moving Rigidbody components Vector3 m_ResetVector; Vector3 m_UpVector; Vector3 m_RightVector; const float speed = 5.0f;

void Start() { //You get the Rigidbody component attached to the GameObject m_Rigidbody = GetComponent<Rigidbody>(); //This starts with the Rigidbody not moving in any direction at all m_MoveDirection = MoveDirection.None;

//These are the GameObject’s starting position and Rigidbody position m_StartPosition = transform.position; m_StartForce = m_Rigidbody.transform.position;

//This Vector is set to 1 in the y axis (for moving upwards) m_UpVector = Vector3.up; //This Vector is set to 1 in the x axis (for moving in the right direction) m_RightVector = Vector3.right; //This Vector is zeroed out for when the Rigidbody should not move m_ResetVector = Vector3.zero; }

void Update() { //This switches the direction depending on button presses switch (m_MoveDirection) { //The starting state which resets the object case MoveDirection.None: //Reset to the starting position of the GameObject and Rigidbody transform.position = m_StartPosition; m_Rigidbody.transform.position = m_StartForce; //This resets the velocity of the Rigidbody m_Rigidbody.velocity = m_ResetVector; break;

//This is for moving in an upwards direction case MoveDirection.Up: //Change the velocity so that the Rigidbody travels upwards m_Rigidbody.velocity = m_UpVector * speed; break;

//This is for moving left case MoveDirection.Left: //This moves the Rigidbody to the left (minus right Vector) m_Rigidbody.velocity = -m_RightVector * speed; break;

//This is for moving right case MoveDirection.Right: //This moves the Rigidbody to the right m_Rigidbody.velocity = m_RightVector * speed; break;

//This is for moving down case MoveDirection.Down: //This moves the Rigidbody down m_Rigidbody.velocity = -m_UpVector * speed; break; } }

void OnGUI() { //Press the reset Button to switch to no mode if (GUI.Button(new Rect(100, 0, 150, 30), "Reset")) { //Switch to start/reset case m_MoveDirection = MoveDirection.None; }

//Press the Left button to switch the Rigidbody direction to the left if (GUI.Button(new Rect(100, 30, 150, 30), "Move Left")) { //Switch to the left direction m_MoveDirection = MoveDirection.Left; }

//Press the Up button to switch the Rigidbody direction to upwards if (GUI.Button(new Rect(100, 60, 150, 30), "Move Up")) { //Switch to Up Direction m_MoveDirection = MoveDirection.Up; }

//Press the Down button to switch the direction to down if (GUI.Button(new Rect(100, 90, 150, 30), "Move Down")) { //Switch to Down Direction m_MoveDirection = MoveDirection.Down; }

//Press the right button to switch to the right direction if (GUI.Button(new Rect(100, 120, 150, 30), "Move Right")) { //Switch to Right Direction m_MoveDirection = MoveDirection.Right; } } }

变量

Left这是 MoveDirection 的 Left 状态。分配向左移动的功能。
Up这是 MoveDirection 的 Up 状态。分配向上移动的功能。
Right这是 MoveDirection 的 Right 状态。分配向右移动的功能。
Down MoveDirection 的 Down 状态。分配向下移动的功能。
None这是 None 状态。分配停止移动的功能。