Prototype for instancing in node tree #82534

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Jacques Lucke · 2020-11-09T14:10:16+01:00

Jacques Lucke commented

2020-11-09 14:10:16 +01:00

Should be able to validate the design so the instancing system can work:

Fast
Memory efficient
Doable in a sprint (1 week even)

912b38001f
b081108819
5877e34eb4

Should be able to validate the design so the instancing system can work: * Fast * Memory efficient * Doable in a sprint (1 week even) 912b38001f b081108819 5877e34eb4

Jacques Lucke commented

2020-11-09 14:10:16 +01:00

Added subscribers: @JacquesLucke, @dfelinto

Jacques Lucke self-assigned this 2020-11-09 14:57:48 +01:00

Kenzie commented

2020-11-10 08:53:50 +01:00

Added subscriber: @KenzieMac130

Miro Horváth commented

2020-11-10 13:21:31 +01:00

Added subscriber: @MiroHorvath

Jacques Lucke commented

2020-11-10 16:44:10 +01:00

I made some progress on this. The code is currently in the temp-modifiers-instancing branch. It's still fairly limited, but it's getting there. :)

One issue is that this only works when the modifier is on a point cloud object for now. That is because to make it work, I had to change the way modifiers are evaluated a bit. That is obviously much easier to do for point cloud objects, because there is nothing that I can break. Making it work when the modifier is on a mesh object is a bit more involved, but should still be doable. I'll look into that a bit later.

2020-11-10 16-34-37.mp4

I made some progress on this. The code is currently in the `temp-modifiers-instancing` branch. It's still fairly limited, but it's getting there. :) One issue is that this only works when the modifier is on a point cloud object for now. That is because to make it work, I had to change the way modifiers are evaluated a bit. That is obviously much easier to do for point cloud objects, because there is nothing that I can break. Making it work when the modifier is on a mesh object is a bit more involved, but should still be doable. I'll look into that a bit later. [2020-11-10 16-34-37.mp4](https://archive.blender.org/developer/F9253216/2020-11-10_16-34-37.mp4)

Kenzie commented

2020-11-10 21:39:23 +01:00

Will the instances be allowed to be converted to geometry inside the node tree for further editing?

Dalai Felinto commented

2020-11-11 11:08:49 +01:00

@astrand130 it is a bit early for this question. The prototype is intended to understand what can and can't be done given the requirements above (fast, memory efficient, can be implemented in a short time). This is enough for the use case that the project will support first. Anything beyond that falls outside the scope of the feature at this stage. It can be contemplated, but it won't be used to drive the decisions.

For completion sake, we also talked about what happens to the instances when you plug a subsurf modifier after the Nodes modifier. Or a boolean modifier. Ideally it should all be supported, but it is not a hard requirement for the initial scenarios.

@astrand130 it is a bit early for this question. The prototype is intended to understand what can and can't be done given the requirements above (fast, memory efficient, can be implemented in a short time). This is enough for the use case that the project will support first. Anything beyond that falls outside the scope of the feature at this stage. It can be contemplated, but it won't be used to drive the decisions. For completion sake, we also talked about what happens to the instances when you plug a subsurf modifier *after* the Nodes modifier. Or a boolean modifier. Ideally it should all be supported, but it is not a hard requirement for the initial scenarios.

Dalai Felinto commented

2020-11-11 11:09:06 +01:00

On an related note, to be involved with the project It is easier to contact any team member on blender.chat to see where to help. This is not one of the nodes we would leave to contributors. But there are other parts that you can contribute to.

Sergey commented

2020-11-28 11:48:22 +01:00

Added subscriber: @randum

Sergey commented

2020-11-28 11:48:22 +01:00

Instances can be joined but boolean node seems does not work. I guess it should?

{F9398028, size=full}

Instances can be joined but boolean node seems does not work. I guess it should? {[F9398028](https://archive.blender.org/developer/F9398028/boolean_on_instances.gif), size=full}

Dalai Felinto commented

2020-11-30 09:15:43 +01:00

@randum instancing happens outside the modifier tree. So boolean is not operating in the final evaluated mesh. Once this is committed to master (soon) this information will be present in the user manual entry for the point instance node. Meanwhile you can read about it here .

@randum instancing happens outside the modifier tree. So boolean is not operating in the final evaluated mesh. Once this is committed to master (soon) this information will be present in the user manual entry for the point instance node. Meanwhile you can read about it [here ](http://dalaifelinto.com/geometry-nodes/modeling/modifiers/nodes/point/point_instance.html).

Dalai Felinto commented

2020-11-30 09:28:48 +01:00

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

Dalai Felinto closed this issue

2020-11-30 09:28:48 +01:00

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Prototype for instancing in node tree #82534