围绕游戏对象的多个轴旋转

Question

I am creating a measure app for iOS using Unity. I was able to measure distance between 2 points and show it in a GameObject . This is what I have achieved so far: [.[Measure something on the floor. User looking at top][1]][1]

[![Measure horizontally on vertical plane][2]][2]

My update method is like this.

    if(textObj.activeInHierarchy == true)
            {
                direction = pointTwo - pointOne;                    
                textObj.transform.right = direction; 

            }

textObj is the white color measure indicator. pointOne and pointTwo are the starting point and ending point of the line.

1. I want to show this measure indicator always readable to the user regardless of his position. But in my case(second picture), the indicator should be tilled towards the user around its X axis and its Z axis always should be perpendicular to the drawn line.Its Y axis should always face towards the inverse direction of camera.transform.forward. I tried adding

   textObj.transform.up = -arCamera.transform.forward;

before set the textObj.transform.right = direction; but that doesn't change any. But you can see in Apple Measure app the distance indicator is always readable to the user regardless of his position. How can I achieve this? Please help me.

Thanks: [1]: https://i.stack.imgur.com/OQnmA.png [2]: https://i.stack.imgur.com/Hxwln.png

Answer 1

You can try this method: https://docs.unity3d.com/ScriptReference/Transform.LookAt.html

In you case you want the text object to look at the camera. The second parameter is a Vector specifying the upward direction, using the default value of Vector3.up it should work for you.