ImGuizmo::IsOver() returns 'true' when hovering in certain locations around the gizmo

[AndreiDespinoiu]

Steps to reproduce:

1. Add this in your render loop:

std::cout << "Result is: " << std::boolalpha << ImGuizmo::IsOver() << '\n';

2. While the gizmo is visible, hover the mouse cursor around it, avoiding the actual elements that comprise the gizmo.

The following occurs:
The IsOver() function returns true, regardless if the mode is set to world space or local space, and regardless if the transform operation is set to translation or scaling.
Note: Also occurs while in rotation mode, on the inside of the gizmo, as if it's hitting the backside of the control circles.

Expected result:
It should return true only if actual elements from the gizmo are hovered.

Additional information:
Dear ImGui 1.78
OpenGL 3.3
GLFW 3.3.2
Windows 10 (64-bit) build 1903

[AndreiDespinoiu]

I'm also getting some weirdness with the central white dot (and near the red axis) when the gizmo isn't visible:

This shouldn't return true if the gizmo isn't drawn.

if (isGuiGizmoVisible)
{
       ImGuizmo::Manipulate(...);
}

Here isGuiGizmoVisible is a boolean that I'm toggling on and off.

Maybe it's a different bug? Eh... I'm mentioning it here as a comment because they seem related.

[CedricGuillemet]

That's interesting. Let me check that :)

[CedricGuillemet]

@AndreiDespinoiu Do you have a call to viewManipulate ?

[AndreiDespinoiu]

@CedricGuillemet No. Just the gizmo (ImGuizmo::Manipulate).

[CedricGuillemet]

@AndreiDespinoiu Can you please try to replicate the issue in the sample? You'll need to comment the line to viewManipulate because this call interfers with view/projection matrix (I'll fix that soon)

[AndreiDespinoiu]

Yes, it happens in the sample as well.

Add this line:

std::cout << "Result is: " << std::boolalpha << ImGuizmo::IsOver() << '\n';

before creating the sequencer, so that means at line 565 from main() here: https://github.com/CedricGuillemet/ImGuizmo/blob/master/example/main.cpp#L565

Obviously, you need this header at the top:

#include <iostream>

It doesn't matter if you comment out the ImGuizmo::ViewManipulate line or not.

[CedricGuillemet]

I'm trying again to repro ... and I get the same as you. I'm investigating now :)

[CedricGuillemet]

I just pushed to main branch and it should be fixed. Let me know if it works for you...or not !

[AndreiDespinoiu]

All right! This is awesome. It's fixed. Thank you so much!

Now about the white dot in the middle that I showed in the second gif... I submitted it as a separate issue, which I hope you'll take a look at: #133. Thank you!