我如何左右移动气缸？

Question

Between two points or only to the left nonestop or only to the right nonestop.

In this code i spin the cylinder but i can't move it to the sides:

using UnityEngine;
using System.Collections;

public class MakeTwoPoints3D : MonoBehaviour
{
    public float speed = 10f;

    public float delta = 15.5f;  // Amount to move left and right from the start point
    public float moveSpeed = 5.0f;
    private Vector3 startPos;

    void Start()
    {
        startPos = transform.position;
    }

    void Update()
    {
        transform.Rotate(Vector3.up, speed * Time.deltaTime);
        transform.position += transform.right * Time.deltaTime * moveSpeed;
    }
}

If i make transform.right it will move the cylinder in circle on place up and down in circle. If i make transform.up it will move it to me i mean like forward but to the camera but at least it will move it. And if i make transform.Forward again it will make circles and will remove the cylinder in circles up down.

I can't figure out how to move it to the sides.

Answer 1

You need use Vector3.right instead of transform.right .

void Update()
{
    transform.Rotate(Vector3.up, speed * Time.deltaTime);
    transform.position += Vector3.right * Time.deltaTime * moveSpeed;
}

When you use transform.right , the Vector3 will adopt the local rotations of that object's transform. Meaning, if the object was rotated 45 degrees around the Y axis, your transform.right vector would be on an angle. If you keep translating an object along it's local axis while you rotate it, it will travel in a circle.

On the other hand, Vector3.right is always in world space so it will always face "true" right.