Isometric - Camera follow an object when at the edge of the screen

Questions & Answers
1

Hi!

I’m brand new to Unity and want to create an Isometric turn-based game like Final Fantasy Tactics, Disgaea, etc. (at least a prototype to train myself).

The problem I’m facing here is that my camera follows my cursor on each of its movement as you can see here, while I would want the camera to start following the cursor only when it is at the edges of the screen.

I’m using an Isometric Z as Y grid with isometric tilemaps with it. I also have the cursor GameObject, which is the object I want to follow, moving with WASD.

Here are the components and parameters of my camera:

133333-main-camera-inspector.png
133333-main-camera-inspector.png354×503 31.2 KB

And here’s the CameraController script to follow the Cursor:

using UnityEngine;

public class CameraController : MonoBehaviour
{
    public GameObject cursor;

    private Vector3 offset;

    private void Start()
    {
        offset = transform.position - cursor.transform.position;
    }

    void LateUpdate()
    {
        transform.position = cursor.transform.position + offset;
    }
}

For this script, I followed the basic script found in the Unity documentation, but I tried a lot of different way to try and get the result I’m trying to achieve, which didn’t really worked well.

I also watched and read a lot of things about camera movement but still didn’t really understood everything, so I’m kind of lost on how I should approach this.

So could it be possible to somehow calculate or get the edges of what the camera sees to make it follow the cursor when it reaches them?

2

You can make use of WorldToVIewportPoint and check if your cursor is in some width / height ratio. For example, you could check if the cursor position (as viewport point) is in x<0.1 or x>0.9 and the same for y. So the margin would be 10% of the width and 10% of the height, and when the cursor go inside those margins, you update the camera position.