Incorrect mouse-over behavior using GUI.Window, after scaling UI by changing GUI.matrix

Questions & Answers
1

Hello,

When a user switches to a screen resolution, lower than a predefined value, we scale down the whole UI using GUI.Matrix. Everything shows up fine, but when GUI.Window is used, gui elements with Hover style detect mouse incorrectly. Also Rect.Contains(…) starts working incorrectly.

Setting the matrix:

Vector3 scale = Vector3.zero;
scale.z = 1;
scale.y = Screen.height < 1024 ? Screen.height/1024 : 1;
scale.x = scale.y;
GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, scale);

This started happening after upgrading from Unity 4.1.0 to 4.2.0. I noticed there is a new GUI.ModalWindow from 4.1.2, which when used, does not produce the above problems as GUI.Window. However using GUI.ModalWindow is not always possible.

This seems like a big problem, especially for Unity games run on game portals, where the resolution is really low by default.

Anyone bumbed into this?
Thanks in advance

2

The problem is the inconsistent behaviour of different API functions.
For example, as Grahan mentioned, you can apply the scale in calls to Rect.Contains functions, alright.
On the other hand, GUI.Button works fine without modifying anything - clicks on the button are captured correctly.
However, using GUIStyle with normal/hover texture backgrounds, does not work correctly, and you have none control over this.

And it seems that in version 4.3, this is all fixed and everything works as expected. Have to double check that though.