Attribute Math Node for pebbles distribution - needs updated mockup #82159

New Issue

Dalai Felinto · 2020-10-27T17:08:31+01:00

Dalai Felinto commented

2020-10-27 17:08:31 +01:00

The mockup still needs to be updated:

Need enum to set value directly (nice to have)

Nice to have would be an enum so users can plug/set a float directly. See #82618.

The mockup still needs to be updated: * Need enum to set value directly (nice to have) ![image.png](https://archive.blender.org/developer/F9275849/image.png) Nice to have would be an enum so users can plug/set a float directly. See #82618.

Dalai Felinto commented

2020-10-27 17:08:31 +01:00

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

Dalai Felinto commented

2020-10-27 17:08:31 +01:00

Added subscriber: @dfelinto

Dalai Felinto changed title from ~~Attribute Math Node~~ to Attribute Math Node for pebbles distribution

2020-11-13 15:27:01 +01:00

Dalai Felinto changed title from ~~Attribute Math Node for pebbles distribution~~ to Attribute Math Node for pebbles distribution - needs updated mockup

2020-11-13 15:49:00 +01:00

Simon Thommes commented

2020-11-13 15:54:13 +01:00

Added subscriber: @SimonThommes

Simon Thommes commented

2020-11-13 15:54:13 +01:00

Updated Mockup with 'Result' attribute field

![image.png](https://archive.blender.org/developer/F9275849/image.png) Updated Mockup with 'Result' attribute field

Hans Goudey self-assigned this 2020-11-24 14:09:55 +01:00

Hans Goudey commented

2020-11-24 14:10:56 +01:00

{F9365448 size=full}

{[F9365448](https://archive.blender.org/developer/F9365448/image.png) size=full}

Sergey commented

2020-11-24 16:59:07 +01:00

Added subscriber: @randum

Sergey commented

2020-11-24 16:59:07 +01:00

Should not attribute math node hase enum of mesh element (point, polygon, corner, ...)?

Should not `attribute math` node hase enum of mesh element (point, polygon, corner, ...)?

Dalai Felinto commented

2020-11-24 17:17:53 +01:00

@randum this is inferred from the attribute

Sergey commented

2020-11-24 17:28:51 +01:00

So the node is searching name of given attribute in mesh elements. But if two elements have the same name of attribute than one attribute is overriding another. Is it so?

Hans Goudey commented

2020-11-25 02:17:08 +01:00

Right, there will need to be special handling for this case of adding an attribute with a name that's already used. It's not the largest problem right now though.

Dalai Felinto commented

2020-11-30 09:29:38 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Dalai Felinto closed this issue

2020-11-30 09:29:38 +01:00

Sergey commented

2020-12-11 18:39:35 +01:00

I have a question. It looks like point distribute node can include vertex group as point attributes. In my particular case geometry has Sv_VGroup vertex group and points are scattering as I expected. But Attribute math node looks like can't perform the same trick. Nodes in yellow border work but math node with Sv_VGroup attribute does not. The question is whether the node intended to work with vertex groups as point attributes?
{F9502991, size=full}

I have a question. It looks like `point distribute` node can include `vertex group` as point attributes. In my particular case geometry has `Sv_VGroup` vertex group and points are scattering as I expected. But `Attribute math` node looks like can't perform the same trick. Nodes in yellow border work but math node with `Sv_VGroup` attribute does not. The question is whether the node intended to work with vertex groups as point attributes? {[F9502991](https://archive.blender.org/developer/F9502991/2020-12-11_20-50-24.png), size=full}

Hans Goudey commented

2020-12-11 18:48:16 +01:00

@randum Yes, that is supposed to work.

Sergey commented

2020-12-11 18:52:10 +01:00

@HooglyBoogly Should I open bug report then?

Hans Goudey commented

2020-12-11 19:21:25 +01:00

Yes, sure, there's no report for that yet, so it would be helpful.

Sergey commented

2020-12-11 20:05:40 +01:00

I've understood the problem. It's not a bug. There should be something like transfer attributes node between points distribute and attribute math nodes. Because when points were scattering they did not inherit attributes of parent mesh I guess. So transfer attributes node should pass vertex group attribute to scattered points. So it's something GM is not capable yet.

I've understood the problem. It's not a bug. There should be something like `transfer attributes` node between `points distribute` and `attribute math` nodes. Because when points were scattering they did not inherit attributes of parent mesh I guess. So `transfer attributes` node should pass `vertex group` attribute to scattered points. So it's something GM is not capable yet.

Hans Goudey commented

2020-12-11 20:32:52 +01:00

Oh, sorry, I totally misunderstood the situation. So yeah, not a bug, but sampling attributes from the "scattered on" mesh in the point distribute node should be doable in the future. Thanks again for testing.

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Attribute Math Node for pebbles distribution - needs updated mockup #82159