Coordinates of mouse in a box collider

[KiraSensei]

Hello everyone !

I’m trying to make some UI : a texture with an alpha cutout handled by the position of the mouse in a box collider with the OnMouseDrag function.

But I don’t know if it is possible to know what the mouse coordinates are, in the X-axis for example.

This may not be very clear
If the user clicks on the mouse when it is into the bow collider, but totally on the left side, I want my alpha cutout at 0, on the middle at 0.5, and on the right at 1.

[robertbu]

If your camera is axis aligned, and you know the world size of your object and your world object is not scaled, then calculating the relative x-axis is fairly straight forward. If your camera has a rotation of (0,0,0) and is therefore looking towards positive ‘z’, you can add a script like this to the object:

var pos = Input.mousePosition;
pos.z = transform.position.z - Camera.main.transform.position;
pos = Camera.main.ScreenToWorldPoint(pos);
pos = transform.InverseTransformPoint(pos);

‘pos’ is now in local coordinates. Negative values will be to the left, positive to the right. You can set a threshold for what you consider ‘middle’.