MoveDirection.Down

説明

The Down State of MoveDirection. Assign functionality for moving in a downward direction.

Use the Down state for an easily identifiable way of moving a GameObject downwards (0 , -1 , 0). This is a state without any predefined functionality. Before using this state, you should define what your GameObject will do in code.

//Attach this script to a GameObject with a Rigidbody component. Press the "Move Down" button in Game view 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;
    const float speed = 10.0f;

    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 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 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 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;
        }
    }
}