Impossible to produce wheel actions on a trackpad

[codedpalette]

Describe the bug

Hello, I am using camera-controls with perspective camera and mouse wheel action set to dolly. Since merging of #607 it is now impossible to dolly camera on trackpad since the library overrides the configuration to always zoom.

I don't think the rationale in #604 is a cause for changing the library. What was described is expected behavior (action configured to truck - camera trucks). Trackpad produces mouse wheel event for a reason, and it is to adhere to web standards. If somebody wants to implement pinch to zoom it should be done in client space and not in the library internals (like shown in https://github.com/yomotsu/camera-controls/blob/dev/examples/mouse-drag-with-modifier-keys.html). Overriding user config in library is a violation of an API contract and also it shouldn't have been done in patch version bump. Please revert this change.

To Reproduce

Steps to reproduce the behavior:

1. Set the mouse wheel action to dolly
2. Pinch on a trackpad
3. Observe camera zoom instead of dolly

Code

Live example

No response

Expected behavior

Camera dollies in/out

Screenshots or Video

No response

Device

Desktop

OS

MacOS

Browser

Chrome

[KayvT]

I am having a similar problem. For some reason I cannot for the life of me make the pinch action have the same action as the mouse wheel.

Even worse, even if I use pinch, it dollys, but past a specific point.. I cannot use the mouse wheel to get out of the dolly! I am stuck at whatever dolly level I am at unless I dolly out all the way and then I can use my mouse wheel to zoom normally..

Was someone able to find a way to make the pinch gesture on a trackpad actually zoom instead of dolly. I would like to completely disable dolly.

[yomotsu]

Apologies for the confusion
Could this PR #625 fix the issue...?

[KayvT]

Hello! Thank you for such a quick response. I really appreciate your work.

Yes, looks like this will fix my issue actually! My main purpose is to just disable dolly, and make the pinch zoom normally as it does on the mouse wheel.

Just out of my own curiosity, the ctrl key is set to true whenever a user pinches on macos? Is that what the comment means?

[yomotsu]

@KayvT

Thanks for checking it.

the ctrl key is set to true whenever a user pinches on macos?

Exactly. pinches and other trackpad gestures will trigger a ctrl+wheel event
Here is the background of the change: #604

[KayvT]

@yomotsu makes a lot of sense, thank you!