I can't understand why the scene moves away using the classic [jit.anim.drive] with [jit.gl.camera look @tripod 1 @locklook 1]

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Hello,
I want to turn around the scene
I can't understand why the scene moves away using the classic [jit.anim.drive] with [jit.gl.camera lo

tripod-issue

take a look at the locklook entry of the jit.gl.camera reference page

take a look at the locklook entry of the  jit.gl.camera reference page

the @locklook forces the camera to remain pointed at the lookat value, 

That's what I want. The lookat is set to 0 0 -2

Also its ignores the orientation messages and attributes and its default is 0.

I've set it to 1 and there is no orientation value in the box.

-> Using the "a" and "d" keys (set in jit.anim.drive in order to move) the camera seems to step back from the 0 0 0 position

it does not remain pointed at the lookat position

2020-12-07 17-34-59.mp4

Okay,
I can read :
the @locklook forces the camera to remain pointed at the lookat value,  
That's what  I want. The lookat is set to 0 0 -2

Also its ignores the orientation messages and attributes and its default is 0.
I've set it to 1 and there is no orientation value in the box.

-> Using the "a" and "d" keys (set in jit.anim.drive in order to move) the camera seems to step back from the 0 0 0 position
it does not remain pointed at the lookat position
I want to turn around the center ...

How does it work?
Thanks for clarifying me.


Maybe you want to add @tripod 1 so it doesn't tilt? 

In any case if you just wish to rotate around the scene I would rather do it with sin and cos and a jit.mo.time, if you don't need to manually move the camera.

Maybe you want to add @tripod 1 so it doesn't tilt? 

In any case if you just wish to rotate around the scene I would rather do it with sin and cos and a jit.mo.time, if you don't need to manually move the camera. 

Hi, can I ask if you found a solution to this as I am having the same problem (I think),

i.e. I have [ jit.gl.camera myWorld @position 0 0 2 @tripod 1 @lookat 0 0 0 @locklook 1 ]

driven by [ jit.anim.drive @ui_listen 1 ]

the camera remains pointed at the origin, but when rotating using A, D, Q, Z the camera's distance from the origin incrementally increases with each key press, so it is always spiralling outward.

What am I doing wrong? or is this a bug? (running MAX 8.0.8).

driven by [ jit.anim.drive @ui_listen 1 ]

the camera remains pointed at the origin, but when rotating using A, D, Q, Z the camera's distance from the origin incrementally increases with each key press, so it is always spiralling outward.

What am I doing wrong? or is this a bug? (running MAX 8.0.8).

Thanks!

Hector.

You do nothing wrong, there's a bug that sometimes happens.

I got rid of it with a patch built from scratch.

You do nothing wrong, there's a bug that sometimes happens.
I got rid of it with a patch built from scratch.


i wouldn't call it a bug, it's simply the default behavior of jit.anim.drive. if you want to animate the camera on a path (e.g. a circle centered on your lookat point), then use another tool for animation rather than the move animations offered by jit.anim.drive.

jit.anim.path, jit.time.sin, or simply using expr are all possible options:

i wouldn't call it a bug, it's simply the default behavior of jit.anim.drive. if you want to animate the camera on a path (e.g. a circle centered on your lookat point), then use another tool for animation rather than the move animations offered by jit.anim.drive. 

jit.anim.path, jit.time.sin, or simply using expr are all possible options:


Ah, thanks both! Good to know that Rob as I tried to rebuild the patch and nothing changed...

I'll go down another route as you suggest,

Ah, thanks both! Good to know that Rob as I tried to rebuild the patch and nothing changed...

I'll go down another route as you suggest,

tripod issue