Calculate Mass does not take object scaling into account #54293

New Issue

Aaron Curtis · 2018-03-12T01:40:53+01:00

Aaron Curtis commented

2018-03-12 01:40:53 +01:00

System Information
Windows 10 w/ NIVIDA GTX 980Ti

Blender Version
Broken: 2.79

Short description of error
Mass values calculated using the "Calculate Mass" button on the Physics tab of the 3d view toolshelf do not take object scaling into account.

Exact steps for others to reproduce the error

Reload startup file
Add Rigid Body physics to the cube
Scale the cube by 0.5 so that it is 1 cubic unit (implied meters)
Click Physics tab, Calculate Mass, Ice (Solid) which has a density of 919 (implied kg / m^3)

The result is 7351.999 which is the mass for a 2x2x2 cube of ice. The result should be 919 (implied kg).

If this is confirmed as a bug, and nobody else immediately wants to do it, I could volunteer to fix this a my first blender contribution.

**System Information** Windows 10 w/ NIVIDA GTX 980Ti **Blender Version** Broken: 2.79 **Short description of error** Mass values calculated using the "Calculate Mass" button on the Physics tab of the 3d view toolshelf do not take object scaling into account. **Exact steps for others to reproduce the error** - Reload startup file - Add Rigid Body physics to the cube - Scale the cube by 0.5 so that it is 1 cubic unit (implied meters) - Click Physics tab, Calculate Mass, Ice (Solid) which has a density of 919 (implied kg / m^3) # The result is 7351.999 which is the mass for a 2x2x2 cube of ice. The result should be 919 (implied kg). If this is confirmed as a bug, and nobody else immediately wants to do it, I could volunteer to fix this a my first blender contribution.

Aaron Curtis commented

2018-03-12 01:40:53 +01:00

Added subscriber: @foobarbecue

Campbell Barton commented

2018-03-12 04:57:03 +01:00

Added subscriber: @ideasman42

Campbell Barton commented

2018-03-12 04:57:03 +01:00

This could give both global and local amount, and agree it's a nice entry-level task.

Benjamin commented

2018-04-21 12:46:15 +02:00

Added subscriber: @BenjaminMuller

Benjamin commented

2018-04-21 12:46:15 +02:00

Is there any work on this at the moment? It seems to be dead somehow.

Germano Cavalcante commented

2020-01-20 20:08:43 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-01-20 20:08:43 +01:00

I can confirm the problem in blender 2.83.

In the 2.80 we no longer have the "Physics tab", so the new step is:
In the 3dView Header go to Object -> Rigid Body -> Calculate Mass

I can confirm the problem in blender 2.83. In the 2.80 we no longer have the `"Physics tab"`, so the new step is: In the 3dView Header go to `Object -> Rigid Body -> Calculate Mass`

blender-admin commented

2020-09-15 12:43:00 +02:00

This issue was referenced by 271f64e358

This issue was referenced by 271f64e3588b76828e346ab8255e722c981a3d3f

Jacques Lucke commented

2020-09-15 12:49:11 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jacques Lucke closed this issue

2020-09-15 12:49:11 +02:00

Jacques Lucke self-assigned this 2020-09-15 12:49:11 +02:00

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Calculate Mass does not take object scaling into account #54293

The result is 7351.999 which is the mass for a 2x2x2 cube of ice. The result should be 919 (implied kg).