Unity Round (Circle) Buttons

This is much simpler than it seems. Unity has functionality built in for this.

theButton.alphaHitTestMinimumThreshold = 0.5f;

Documentation

What this does is only register hits from the raycast if the pixel hit has an alpha of 0.5 or greater.

There is one easy way that only works for round Shapes. In your Button callback you could test the distance of the mouse from the center of the button against the radius of the button and only trigger the click or hoover effect when it is within the buttons radius.

But since you are new, maybe focus on making some gameplay rather than the button design. While a good look and feel are important, i believe a working game will motivate you more. Try focusing on what you can do, instead of what you can't.

YES! THANK YOU @trollingchar.

I added the code to a script and attached the script to the button. that is exactly the functionality i was looking for.

check out the link to the code: https://forum.unity.com/threads/none-rectangle-shaped-button.263684/#post-2146709

using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(RectTransform))]
[RequireComponent(typeof(Image))]
public class RaycastMask : MonoBehaviour, ICanvasRaycastFilter
{
    private Sprite _sprite;

    void Start ()
    {
        _sprite = GetComponent<Image>().sprite;
    }

    public bool IsRaycastLocationValid(Vector2 sp, Camera eventCamera)
    {
        var rectTransform = (RectTransform)transform;
        Vector2 local;
        RectTransformUtility.ScreenPointToLocalPointInRectangle((RectTransform) transform, sp, eventCamera, out local);
        // normalize local coordinates
        var normalized = new Vector2(
            (local.x + rectTransform.pivot.x*rectTransform.rect.width)/rectTransform.rect.width,
            (local.y + rectTransform.pivot.y*rectTransform.rect.height)/rectTransform.rect.width);
        // convert to texture space
        var rect = _sprite.textureRect;
        var x = Mathf.FloorToInt(rect.x + rect.width * normalized.x);
        var y = Mathf.FloorToInt(rect.y + rect.height * normalized.y);
        // destroy component if texture import settings are wrong
        try
        {
            return _sprite.texture.GetPixel(x,y).a > 0;
        }
        catch (UnityException e)
        {
            Debug.LogError("Mask texture not readable, set your sprite to Texture Type 'Advanced' and check 'Read/Write Enabled'");
            Destroy(this);
            return false;
        }
    }
}

for those that are too lazy to follow the link :) here is the code snippet.

It was posted by @senritsu

if i could hug you right now i would :)