Change center of camera orbit

This topic has 4 replies, 3 voices, and was last updated 3 years, 5 months ago by web.

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2021-05-04 at 1:37 pm #40718

web
Customer

I got a topic which give me headaches for quite some time. Many times we have 3d objects together with “infoboxes”.

So for example: I click an object, the camera zooms to that object and a “infobox” is opening. Now I would like to have the 3d object on the left hand side of the screen and the infobox on the right hand side.

When I now wanna rotate the object (orbit the camera) the object is flying in a circle around the screen edges. Because the target of the camera is in the center of the screen but not of the object.

Is there anyway to change this behaviour of the camera? So that when I orbit the camera center is at the object. But make sure the object stays at the left hand side of the screen?

2021-05-05 at 7:49 am #40729

Mikhail Luzyanin
Staff

web wrote:

Is there anyway to change this behaviour of the camera? So that when I orbit the camera center is at the object. But make sure the object stays at the left hand side of the screen?

For this you can use special camera puzzles like “Camera Look at”

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2021-05-05 at 7:58 am #40731

web
Customer

But doesnt the camera look at, centers the target to an object, which means that it will also be centered in the screen?

2021-05-27 at 11:31 am #41523

thomasup
Customer

you can use app.camera.setViewOffset(1,1,.5,0,1,1) to introduce a lens shift via javascript.

this function is inherited from threejs, see docs here:
https://threejs.org/docs/#api/en/cameras/PerspectiveCamera.setViewOffset

we used this to offset our rotation center, which works quite well because it also centers the perspective on the rotation center.

2021-07-19 at 10:39 am #43000

web
Customer

thomasup wrote:

you can use app.camera.setViewOffset(1,1,.5,0,1,1) to introduce a lens shift via javascript.

this function is inherited from threejs, see docs here:
https://threejs.org/docs/#api/en/cameras/PerspectiveCamera.setViewOffset

we used this to offset our rotation center, which works quite well because it also centers the perspective on the rotation center.

Hey thomas,

sorry havent seen your reply. Thank you for that solution. My “workaround” to that topic is using the “app.camera.filmOffset”. This works great for me. But will give your solution a try.
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