Unity gets the coordinate point in front of the current object at a certain angle and distance

1. Sometimes the scene needs to have fixed objects or Canvas Generated directly in front of the character （VR It is more commonly used in English ）

  The code is simple ：

Vector3 targetPos = rig.transform.forward * 2f + rig.transform.position;
wui.transform.position = targetPos;
wui.transform.LookAt(rig.transform);

You can also add angles ：

public Vector3 GetPosition(Quaternion rotation, Vector3 position, float distance) 
{ 
    Vector3 direction = rotation * Vector3.forward; 
    return position + (direction * distance); 
} 

If the object is Canvas（world Space Pattern ）, Notice the pros and cons of the canvas , It can be modified by scale Change the flip of the canvas ： Such as ,gui.transform.localScale=Vector3(-1,1,1)

2. For example, I want to get the angle value of a point right in front of me （ Nodes at the same level are required , Different levels need to convert coordinates first ）

public class Example : MonoBehaviour
{
    public float angleBetween = 0.0f;
    public Transform target;

    void Update()
    {
        Vector3 targetDir = target.position - transform.position;
        angleBetween = Vector3.Angle(transform.forward, targetDir);
    }
}

Vector3 Subtract to get the direction vector , And then transform.forward Take angle .

3. Pay attention to these two common forward The difference between