Accumulate Node doesn't work with Points node #100945

New Issue

Erindale · 2022-09-09T14:40:34+02:00

Erindale commented

2022-09-09 14:40:34 +02:00

System Information
Operating system: Windows-10-10.0.18363-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.77

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce
Worked: (newest version of Blender that worked as expected)

Short description of error
The Position socket of Points node doesn't seem to register positions if the vector is coming from an Accumulate field node.

Exact steps for others to reproduce the error
Add accumulate field node to sum a random value node.
Plug this into the Points' Position socket.

**System Information** Operating system: Windows-10-10.0.18363-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.77 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: `0759f671ce` Worked: (newest version of Blender that worked as expected) **Short description of error** The Position socket of Points node doesn't seem to register positions if the vector is coming from an Accumulate field node. **Exact steps for others to reproduce the error** Add accumulate field node to sum a random value node. Plug this into the Points' Position socket. ![image.png](https://archive.blender.org/developer/F13472463/image.png)

Erindale commented

2022-09-09 14:40:34 +02:00

Added subscriber: @Erindale

blender-admin commented

2022-09-09 14:40:34 +02:00

#100944 was marked as duplicate of this issue

Iliya Katushenock commented

2022-09-09 14:44:10 +02:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2022-09-09 14:44:10 +02:00

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

Iliya Katushenock closed this issue

2022-09-09 14:44:10 +02:00

Iliya Katushenock commented

2022-09-09 14:44:10 +02:00

Yes, it won't work.
The point node creates a new context that does not match the context of other nodes.
Let's just say that other nodes either get a context (which has a geometry component) or are computed for context values.
The point node and the volume node in the cube will create their own context but without the component (as an optimization). For this reason, you can only compute in them like math or translation, but not process like accumulation, domain interpolation, or smooth attribute

Yes, it won't work. The point node creates a new context that does not match the context of other nodes. Let's just say that other nodes either get a context (which has a geometry component) or are computed for context values. The point node and the volume node in the cube will create their own context but without the component (as an optimization). For this reason, you can only compute in them like math or translation, but not process like accumulation, domain interpolation, or smooth attribute

Pratik Borhade commented

2022-09-09 14:44:49 +02:00

Added subscriber: @PratikPB2123

Erindale commented

2022-09-09 15:04:21 +02:00

In #100945#1414609, @mod_moder wrote:
Yes, it won't work.

Things like this need to have some kind of notice to the artist. Tools can't just not work intentionally 😅
Why not have a backup process for things like this so it behaves as expected even if it's a temporary solution like internalising a set position node after point generation?

> In #100945#1414609, @mod_moder wrote: > Yes, it won't work. Things like this need to have some kind of notice to the artist. Tools can't just not work intentionally 😅 Why not have a backup process for things like this so it behaves as expected even if it's a temporary solution like internalising a set position node after point generation?

Hans Goudey commented

2022-09-09 15:08:16 +02:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2022-09-09 15:08:16 +02:00

Changed status from 'Archived' to: 'Confirmed'

Hans Goudey reopened this issue

2022-09-09 15:08:16 +02:00

Hans Goudey commented

2022-09-09 15:08:16 +02:00

Think it's a bit premature to close this without more discussion.
I'm not sure that we would also implement the accumulate node for this field context, but at least we should explicitly decide not to.

For the volume cube I don't think we would, but the points node is a bit different because it still has an order.

Think it's a bit premature to close this without more discussion. I'm not sure that we would also implement the accumulate node for this field context, but at least we should explicitly decide not to. For the volume cube I don't think we would, but the points node is a bit different because it still has an order.

Iliya Katushenock commented

2022-09-09 15:09:53 +02:00

The message system for entering a field is not the appropriate context suitable? #94039

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Accumulate Node doesn't work with Points node #100945