Unity Instantiate object at mouse point getting wrong coordinates

Question

I 'm working on an RTS and want to place a gameobject on the mouseposition. This works, but the object is placed in the wrong location.

The picture below shows a raycast of where my mouse is. But the object (cube, bottom left of the terrain) gets instantiated nowhere near the raycast.

This is the code i'm using to get the position, what am I doing wrong?

toBuild.build(Camera.main.ScreenToWorldPoint(hit.point));

Could you post more of your code please? Why are you using ScreenToWorldPoint? You seem to use a raycast which already gives a result in world space .. — derHugo
If I use the point from the raycast it gets instantiated closer to the mouse position but still not correct. The actual instantiation is done through: Instantiate(this, location, Quaternion.identity) This being the gameobject, and location is the location from the raycast — Robin van Breukelen
Well so ... Can you show your complete code of the raycast etc? — derHugo
Yes of course here it is, it seperated in different classes but here's the callstack: RaycastHit hit; Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); Debug.DrawRay(ray.origin, ray.direction * 500, Color.blue); ... Physics.Raycast(ray, out hit, 500); ... toBuild.build(hit.point); ... Transform transform = Instantiate(this, location, Quaternion.identity).GetComponent<Transform>(); That's it — Robin van Breukelen

Daniel Koch Daniel Koch · Accepted Answer · 2020-06-18T15:52:48

It looks like that you are raycasting in world space but for some reason, you use the cast hit as a screen position. It should already be in a world position so don't use Camera.main.ScreenToWorldPoint().

Unity Instantiate object at mouse point getting wrong coordinates

2 Answers