Geometry Nodes: Laplacian Smooth Node #86955

New Issue

Himanshi Kalra · 2021-03-26T05:15:12+01:00

Himanshi Kalra commented

2021-03-26 05:15:12 +01:00

This task is for a port of a Laplacian Smooth modifier.
It is for now a 1-1 copy.
Name: Laplacian Smooth

Details

Lambda Factor and Lambda Boundary takes float input.
Selection. originally a vertex group, can use Attribute.
Preserve volume and Normalize takes boolean input.

Further Questions
Which all features to expose and which can be hidden.

Implementation
Using the modifier code as the base and adjusting it to Node view.
I don't yet have the foresight to comment on implementation or potential hindrances.
I can try implementing it and later can come up with shortcomings.

![image.png](https://archive.blender.org/developer/F9928070/image.png) This task is for a port of a Laplacian Smooth modifier. It is for now a 1-1 copy. Name: Laplacian Smooth **Details** Lambda Factor and Lambda Boundary takes float input. Selection. originally a vertex group, can use Attribute. Preserve volume and Normalize takes boolean input. **Further Questions** Which all features to expose and which can be hidden. **Implementation** Using the modifier code as the base and adjusting it to Node view. I don't yet have the foresight to comment on implementation or potential hindrances. I can try implementing it and later can come up with shortcomings.

Himanshi Kalra self-assigned this 2021-03-26 05:15:12 +01:00

Himanshi Kalra commented

2021-03-26 05:15:12 +01:00

Added subscriber: @Calra

Victor-Louis De Gusseme commented

2021-03-26 12:38:10 +01:00

Added subscribers: @HooglyBoogly, @victorlouis

Victor-Louis De Gusseme commented

2021-03-26 12:38:10 +01:00

This functionality might be covered by this desgin task by @HooglyBoogly: Mesh Smooth Node https://developer.blender.org/T86903. Or is this something different?

This functionality might be covered by this desgin task by @HooglyBoogly: `Mesh Smooth Node` https://developer.blender.org/T86903. Or is this something different?

Simon Sommer commented

2021-03-26 13:25:56 +01:00

Added subscriber: @CreatorSiSo

Simon Sommer commented

2021-03-26 13:25:56 +01:00

Mockup for the direct port (changed repeat to iterations because it make more sense (repeat=0 ?, iterations=0) and it is more consistent with other upcoming nodes):

And a port with some changes to it fit the geo nodes better:

Changes:

added Attribute inputs for Iterations, Lambda Factor and Lambda Border
removed Axis because this can be controlled by modifying the Attributes
removed Factor/Selection/Vertex Group because this can be controlled by the Attributes (best with the Iterations probably)

Mockup for the direct port (changed repeat to iterations because it make more sense (repeat=0 ?, iterations=0) and it is more consistent with other upcoming nodes): ![Laplacian Smooth (Direct Port).png](https://archive.blender.org/developer/F9910523/Laplacian_Smooth__Direct_Port_.png) And a port with some changes to it fit the geo nodes better: ![Laplacian Smooth (Float).png](https://archive.blender.org/developer/F9910534/Laplacian_Smooth__Float_.png) ![Laplacian Smooth (Attribute).png](https://archive.blender.org/developer/F9910541/Laplacian_Smooth__Attribute_.png) Changes: - added Attribute inputs for Iterations, Lambda Factor and Lambda Border - removed Axis because this can be controlled by modifying the Attributes - removed Factor/Selection/Vertex Group because this can be controlled by the Attributes (best with the Iterations probably)

Himanshi Kalra commented

2021-04-10 12:27:35 +02:00

In #86955#1136724, @victorlouis wrote:
This functionality might be covered by this desgin task by @HooglyBoogly: Mesh Smooth Node https://developer.blender.org/T86903. Or is this something different?

I think people already use different types of "Smooth" modifiers. One can combine all of them in one Node and switch between them but the algorithmic implementation is different. From the modifiers list: Smooth, Laplacian Smooth and Smooth Corrective.

> In #86955#1136724, @victorlouis wrote: > This functionality might be covered by this desgin task by @HooglyBoogly: `Mesh Smooth Node` https://developer.blender.org/T86903. Or is this something different? I think people already use different types of "Smooth" modifiers. One can combine all of them in one Node and switch between them but the algorithmic implementation is different. From the modifiers list: Smooth, Laplacian Smooth and Smooth Corrective.

Vladislav Macíček commented

2021-07-14 05:19:10 +02:00

Added subscriber: @Aeraglyx

Hans Goudey commented

2021-11-09 23:35:53 +01:00

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

Hans Goudey closed this issue

2021-11-09 23:35:53 +01:00

Hans Goudey commented

2021-11-09 23:35:53 +01:00

The design around this area has changed a lot (fields, loops, etc), and as long as this design is not actively being worked on, I'd prefer to close this task. Feel free to open another task for design of this node or another.
Lately I've been thinking that we might not want to just port most modifiers directly, but think about how real use cases can be addressed. Maybe the right solution is just porting a modifier, but that's not always clear.

The design around this area has changed a lot (fields, loops, etc), and as long as this design is not actively being worked on, I'd prefer to close this task. Feel free to open another task for design of this node or another. Lately I've been thinking that we might not want to just port most modifiers directly, but think about how real use cases can be addressed. Maybe the right solution is just porting a modifier, but that's not always clear.

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Geometry Nodes: Laplacian Smooth Node #86955