Multiply and divide in item location only calculates second part of separate units. #109837

New Issue

Xen Wildman · 2023-07-07T21:51:43+02:00

Xen Wildman commented

2023-07-07 21:51:43 +02:00

System Information
Operating system:any
Graphics card:any

Blender Version
3.4+

Short description of error
When separate units (imperial) is enabled, the math (multiply/divide) in the item location field is broken.

Exact steps for others to reproduce the error

In a new blender file, set the scene units to imperial.
Check the 'Separate Units' checkbox.

In the 3d viewport, select the default cube and press G X 6.5 to move the default cube 6'6" in the X axis.
Now in the Item Tab, Transform, Item Properties, enter the X location field and add /2 or *0.5 to the end of the line.

The expected behaviour is to halve the value in the field which would result in 3'3". What happens though, is it only calculates for the inches portion of the location, resulting in a location value of 6'3".

**System Information** Operating system:any Graphics card:any **Blender Version** 3.4+ **Short description of error** When separate units (imperial) is enabled, the math (multiply/divide) in the item location field is broken. **Exact steps for others to reproduce the error** In a new blender file, set the scene units to imperial. Check the 'Separate Units' checkbox. In the 3d viewport, select the default cube and press G X 6.5 to move the default cube 6'6" in the X axis. Now in the Item Tab, Transform, Item Properties, enter the X location field and add /2 or *0.5 to the end of the line. The expected behaviour is to halve the value in the field which would result in 3'3". What happens though, is it only calculates for the inches portion of the location, resulting in a location value of 6'3".

SeparateUnitDivide.gif

12 KiB

Xen Wildman added the

labels 2023-07-07 21:51:44 +02:00

YimingWu commented

2023-07-09 04:29:45 +02:00

Can confirm, although it is fine if you do (2m 22cm)/2, it will give you 1m 11cm. Not sure if this is intentional, but probably this is pretty overlooked when designing the in-place expression evaluation. Hard to say which way is right since it does have a space between two values.

Can confirm, although it is fine if you do `(2m 22cm)/2`, it will give you `1m 11cm`. Not sure if this is intentional, but probably this is pretty overlooked when designing the in-place expression evaluation. Hard to say which way is right since it does have a space between two values.

YimingWu added

and removed

labels 2023-07-09 04:29:58 +02:00

Xen Wildman commented

2023-09-18 21:04:52 +02:00

This is still broken in Blender 4.0.

Pratik Borhade commented

2023-12-14 15:04:42 +01:00

Looks like this is expected referring to current code. Following expression is calculated for 6ft 6in / 2 = (6*1 + (6*0.08333/2))*0.3048
0.08333 is 1 inch to feet conversion factor
0.3048 is feet to meter conversion factor

If you do (6ft 6in )/ 2 in UI, it will give correct result

Looks like this is expected referring to current code. Following expression is calculated for 6ft 6in / 2 = `(6*1 + (6*0.08333/2))*0.3048` 0.08333 is 1 inch to feet conversion factor 0.3048 is feet to meter conversion factor If you do (6ft 6in )/ 2 in UI, it will give correct result

Iliya Katushenock commented

2023-12-14 17:29:04 +01:00

I can see incorrectness in the fact that there is 2 separate (by space) part of one value can occur.

Pratik Borhade commented

2023-12-14 18:07:12 +01:00

@mod_moder hi, can you elaborate more. I did not completely understand that 😅

Iliya Katushenock commented

2023-12-14 18:09:45 +01:00

Have you seen any programming language (or just syntax parsing) that lets to you to declare value as multiple separate word (et 123 123 = 123.123, or 33 * 10^-1 55 * 10^-5). Not sure if this can be fixed, but should be restricted instead?

Have you seen any programming language (or just syntax parsing) that lets to you to declare value as multiple separate word (et `123 123` = `123.123`, or `33 * 10^-1 55 * 10^-5`). Not sure if this can be fixed, but should be restricted instead?

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Multiply and divide in item location only calculates second part of separate units. #109837