Zooming - Movement behavior

Request changes or additions in functionality.

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Towkin
Posts: 3
Joined: Tue Jan 29, 2019 2:18 pm

Zooming - Movement behavior

Post by Towkin » Sun Feb 03, 2019 12:45 pm

Hello!

I'd like to request a change in behavior. The way the camera moves when zooming using Ctrl + Scroll Wheel is very... odd. When you scroll, the camera moves with the vector of mouse screen position - screen center. While not entirely useless, it's very difficult to figure out where you land with each zooming level.

The way I'd request the movement to behave, is for the cursor to stay on the same world coordinate position when zooming. I'll demonstrate with a few lines of pseudo-code.

Current way is something along these lines:

Code: Select all

// Zoom delta in range [-1, 1].
Camera.Size *= Pow(1.1, delta);
Camera.Position += ((GetMouseScreenPos() / GetScreenSize()) + (GetScreenSize() / 2)) * Camera.Size * SomeScalar;
The way I'd suggest it should be would do the translation based on the old pointer coordinate:

Code: Select all

var oldMouseWorldPos = Camera.Transform(GetMouseScreenPos());

// Zoom delta in range [-1, 1].
Camera.Size *= Pow(1.1, delta);

var newMouseWorldPos = Camera.Transform(GetMouseScreenPos());
Camera.Position += oldMouseWorldPos - newMouseWorldPos;

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Kanchou
Site Admin
Posts: 1021
Joined: Mon Nov 10, 2014 2:23 pm

Re: Zooming - Movement behavior

Post by Kanchou » Fri Feb 08, 2019 11:53 am

Team's looking into it. Question: are you using the OSX or the Windows version?

Thank you!!

- Alejandro
Alejandro S. Canosa
Three Minds Software

Towkin
Posts: 3
Joined: Tue Jan 29, 2019 2:18 pm

Re: Zooming - Movement behavior

Post by Towkin » Fri Feb 22, 2019 11:59 am

Kanchou wrote:Team's looking into it. Question: are you using the OSX or the Windows version?

Thank you!!

- Alejandro
Hi again! Sorry for the long delay.

I'm using OWM on Windows only.

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Kanchou
Site Admin
Posts: 1021
Joined: Mon Nov 10, 2014 2:23 pm

Re: Zooming - Movement behavior

Post by Kanchou » Thu Mar 07, 2019 12:28 am

Towkin wrote: Hi again! Sorry for the long delay.

I'm using OWM on Windows only.
No problem. Thank you for the feedback!

We'll try to get this into the next version :).
Alejandro S. Canosa
Three Minds Software

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