Expose more built-in data as attributes #84297

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opened 2020-12-31 22:51:03 +01:00 by Hans Goudey · 16 comments

Hans Goudey commented

2020-12-31 22:51:03 +01:00

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Currently the only "built in" attributes are position attributes, and we only use a few reserved name attributes. We should expose more for lower level data access and flexibility.

Vertex normals
Face normals
Corner normals ("custom normals")
material index
tangents
vertex colors (color attributes on the face corner domain)
Index (for each domain) (these will likely be exposed as expressions rather than attributes, since they aren't exactly stored on the data like other attributes)
UV maps

A couple other things to consider:

It's possible that some of them will need to be read-only.
Some types like "bevel weight" don't fit so well in a more generalized attribute system and should likely be versioned to use more generic types like CD_PROP_FLOAT.

Currently the only "built in" attributes are position attributes, and we only use a few reserved name attributes. We should expose more for lower level data access and flexibility. - [x] Vertex normals - [ ] Face normals - [ ] Corner normals ("custom normals") - [x] material index - [ ] tangents - [x] vertex colors (color attributes on the face corner domain) - [ ] Index (for each domain) (these will likely be exposed as expressions rather than attributes, since they aren't exactly stored on the data like other attributes) - [x] UV maps A couple other things to consider: 1. It's possible that some of them will need to be read-only. 2. Some types like "bevel weight" don't fit so well in a more generalized attribute system and should likely be versioned to use more generic types like `CD_PROP_FLOAT`.

Hans Goudey commented

2020-12-31 22:51:03 +01:00

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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'

Hans Goudey commented

2020-12-31 22:51:03 +01:00

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Added subscriber: @HooglyBoogly

Added subscriber: @HooglyBoogly

Damian commented

2021-01-12 15:17:11 +01:00

Added subscriber: @DamianWinnichenko

Added subscriber: @DamianWinnichenko

Damian commented

2021-01-12 15:17:11 +01:00

Also, it would be super-handy if the Vertex Color attribute could be accessed from Geometry Nodes for read/write.
This feature could be used in both, scattering density distribution and shading.

Also, it would be super-handy if the Vertex Color attribute could be accessed from Geometry Nodes for read/write. This feature could be used in both, scattering density distribution and shading.

Dimitri Bastos commented

2021-01-23 01:13:15 +01:00

Added subscriber: @DimitriBastos

Added subscriber: @DimitriBastos

Dimitri Bastos commented

2021-01-23 01:13:15 +01:00

This includes a way to the user to know what is a built-in attribute and what is not? Because I can see lots of naming conventions and a user will not know, by tutorials, if certain attribute is created by another user or a default/built-in attribute. Sorry for my lack of better words explaining, I hope I'm making myself clear.

This includes a way to the user to know what is a built-in attribute and what is not? Because I can see lots of naming conventions and a user will not know, by tutorials, if certain attribute is created by another user or a default/built-in attribute. Sorry for my lack of better words explaining, I hope I'm making myself clear.

Jacques Lucke self-assigned this 2021-02-04 20:46:40 +01:00

Victor-Louis De Gusseme commented

2021-02-08 08:54:07 +01:00

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Added subscriber: @victorlouis

Added subscriber: @victorlouis

blender-admin commented

2021-02-12 19:46:17 +01:00

This issue was referenced by d7c2c889a6

This issue was referenced by d7c2c889a688067dab280fc137ad4c3c7ce4cb2b

Jacques Lucke removed their assignment 2021-02-17 12:32:04 +01:00

Jacques Lucke commented

2021-02-17 12:32:04 +01:00

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Added subscriber: @JacquesLucke

Added subscriber: @JacquesLucke

Jacques Lucke commented

2021-02-17 12:32:04 +01:00

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I unassign myself, because Hans is working on it as well.

I unassign myself, because Hans is working on it as well.

blender-admin commented

2021-02-17 15:30:15 +01:00

This issue was referenced by 53bf04f284

This issue was referenced by 53bf04f2844b64cd9f79bedd047eac9690f872e3

blender-admin commented

2021-02-18 10:24:02 +01:00

This issue was referenced by e3f0b6d5cb

This issue was referenced by e3f0b6d5cbe5d34ac43568090c52a84dc51e579e

Hans Goudey changed title from ~~Expose more built-in / reserved-name custom data as attributes~~ to Expose more built-in data as attributes

2021-03-02 21:17:40 +01:00

blender-admin commented

2021-03-05 22:16:25 +01:00

This issue was referenced by f117ea2624

This issue was referenced by f117ea26246355f423fd78785a3b00a2490bd9a4

blender-admin commented

2021-03-09 19:39:05 +01:00

This issue was referenced by 80f7f1070f

This issue was referenced by 80f7f1070f177ae543f2fa35dd5d458e87ff30c1

Jacques Lucke commented

2021-11-09 18:07:28 +01:00

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Changed status from 'Confirmed' to: 'Archived'

Changed status from 'Confirmed' to: 'Archived'

Jacques Lucke closed this issue

2021-11-09 18:07:28 +01:00

Jacques Lucke commented

2021-11-09 18:07:28 +01:00

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The remaining elements in the list shouldn't really become built-in attributes anymore. They can be exposed as field nodes.

The remaining elements in the list shouldn't really become built-in attributes anymore. They can be exposed as field nodes.

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