Viewpoint disappears when pressing gravity if custom unit scale is used in the scene options. #39561

New Issue

Yes · 2014-04-02T11:51:03+02:00

Yes commented

2014-04-02 11:51:03 +02:00

Windows 7 64bit

Blender Version 2.70

Viewpoint disappears when pressing gravity if custom unit scale is used in the scene options.

Exact steps for others to reproduce the error
Open a new scene. change units to meters. Set custom unit scale to 0.1. Enable walk mode and press TAB to turn on gravity. The camera falls through scene. Select object and press Del to return to original viewpoint.

Windows 7 64bit Blender Version 2.70 Viewpoint disappears when pressing gravity if custom unit scale is used in the scene options. **Exact steps for others to reproduce the error** Open a new scene. change units to meters. Set custom unit scale to 0.1. Enable walk mode and press TAB to turn on gravity. The camera falls through scene. Select object and press Del to return to original viewpoint.

Yes commented

2014-04-02 11:51:03 +02:00

Changed status to: 'Open'

Yes commented

2014-04-02 11:51:03 +02:00

Added subscriber: @GnarlyCarl

Gwenael Le Page commented

2014-04-02 13:37:10 +02:00

Added subscriber: @gwentiv

Gwenael Le Page commented

2014-04-02 13:37:10 +02:00

Isn't that the very point of Gravity ? To make the view point react to gravity and fall through the scene ???

Put a big plane acting as ground in your scene and put the camera directly way above it.
Go into camera view and use walk mode. you'll see the camera stop droping after a while, when "the feet of the cameraman hit the ground" more or less.

To me this isn't a bug, but you not realizing what the tool does.

Isn't that the very point of Gravity ? To make the view point react to gravity and fall through the scene ??? Put a big plane acting as ground in your scene and put the camera directly way above it. Go into camera view and use walk mode. you'll see the camera stop droping after a while, when "the feet of the cameraman hit the ground" more or less. To me this isn't a bug, but you not realizing what the tool does.

Yes commented

2014-04-02 20:21:30 +02:00

I did. collision gets bugged no matter how big the ground is. Also it appears that you fall with a near infinite acceleration.

Just try to reproduce my steps with the final 2.70 release.

I did. collision gets bugged no matter how big the ground is. Also it appears that you fall with a near infinite acceleration. Just try to reproduce my steps with the final 2.70 release.

Dalai Felinto commented

2014-04-02 20:35:10 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2014-04-02 20:35:10 +02:00

please attach a sample file. The gravity respect the scale of the scene. If the scene scale is 0.1, gravity internally will be 10x different.

Dalai Felinto self-assigned this 2014-04-02 20:35:20 +02:00

Gwenael Le Page commented

2014-04-02 22:06:03 +02:00

I am sorry Gnarly, but i can't reproduce.
In my case, I will always hit the ground if the the later is big enough… I see no problems so far.

Maybe your file is faulty. Can you upload one ?

I am sorry Gnarly, but i can't reproduce. In my case, I will always hit the ground if the the later is big enough… I see no problems so far. Maybe your file is faulty. Can you upload one ?

Yes commented

2014-04-03 10:10:58 +02:00

JustPressShiftFandTAB.blend

Ok. I'll upload the scene.

I'm not sure you will see the same error, but for me it doesn't matter how big the ground object is or how far the view camera is from the object. All I see is a near infinite acceleration and an empty view window.

[JustPressShiftFandTAB.blend](https://archive.blender.org/developer/F83838/JustPressShiftFandTAB.blend) Ok. I'll upload the scene. I'm not sure you will see the same error, but for me it doesn't matter how big the ground object is or how far the view camera is from the object. All I see is a near infinite acceleration and an empty view window.

Yes commented

2014-04-03 10:11:11 +02:00

This comment was removed by @GnarlyCarl

*This comment was removed by @GnarlyCarl*

Gwenael Le Page commented

2014-04-03 12:07:26 +02:00

OK, OK, I see it now !

Thanks for the file !

And even at normal scale of 1 there is something strange: you hit the ground and stop, and then go through the top surface when panning and hit the bottom of the cube !

I have made a little experiment in normal scale world:
You go into camera view, you have this big big plane underneath, and you put the camera at a 10 m height. When you press Shift F and TAB, the behaviour is correct, the hit the ground and stop.

Now you re-do it but put the camera higher, at 1000m.
Then you will hit the ground (at ~-3m strangely, although my plane is at z=0) but go through if you pan !

I think there is some problem due to the approximation of the deplacement when you fall too fast !
After a 1km you go really quick without air friction. And if you play with the scale you seem to accelerate everything as well.

OK, OK, I see it now ! Thanks for the file ! And even at normal scale of 1 there is something strange: you hit the ground and stop, and then go through the top surface when panning and hit the bottom of the cube ! I have made a little experiment in normal scale world: You go into camera view, you have this big big plane underneath, and you put the camera at a 10 m height. When you press Shift F and TAB, the behaviour is correct, the hit the ground and stop. Now you re-do it but put the camera higher, at 1000m. Then you will hit the ground (at ~-3m strangely, although my plane is at z=0) but go through if you pan ! I think there is some problem due to the approximation of the deplacement when you fall too fast ! After a 1km you go really quick without air friction. And if you play with the scale you seem to accelerate everything as well.

Yes commented

2014-04-03 12:30:32 +02:00

Are you seeing the same issues if you start a new scene? Or is this issue specifically tied to my .blend files?

Are you seeing the same issues if you start a new scene? Or is this issue specifically tied to my *.blend* files?

Gwenael Le Page commented

2014-04-03 13:44:06 +02:00

Yes, same problem with a new scene.
pb_walk_mode.blend

Here is a file not much different from startup.
If you start your fall from z=100 you'll stop to the groud at 0.12 before going stable at 1.60 in the end.
If you place the camera at z=200, you'll hit the ground at -0.48 (!) and then the fall will go on if you move.

Changing the Gravity value doens't change much. In fact a positive value for Z doesn't make you go up…

oO

Yes, same problem with a new scene. [pb_walk_mode.blend](https://archive.blender.org/developer/F83849/pb_walk_mode.blend) Here is a file not much different from startup. If you start your fall from z=100 you'll stop to the groud at 0.12 before going stable at 1.60 in the end. If you place the camera at z=200, you'll hit the ground at -0.48 (!) and then the fall will go on if you move. Changing the Gravity value doens't change much. In fact a positive value for Z doesn't make you go up… oO

Thomas Dinges commented

2014-04-08 17:18:27 +02:00

Added subscriber: @ThomasDinges

Dalai Felinto commented

2014-04-11 23:56:52 +02:00

Changed status from 'Open' to: 'Resolved'

Dalai Felinto closed this issue

2014-04-11 23:56:52 +02:00

Dalai Felinto commented

2014-04-11 23:56:52 +02:00

Fixed in commit e2cbfb7ad7
(tested with pb_walk_mode.blend)

Fixed in commit e2cbfb7ad740949a03ca3f2f6f6f3b99f19e387b (tested with pb_walk_mode.blend)

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Viewpoint disappears when pressing gravity if custom unit scale is used in the scene options. #39561