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GPv3: Add layer 'pass index' attribute. #118495

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Bastien Montagne merged 4 commits from mont29/blender:tmp-gp-layer-index into main 2024-02-22 14:54:00 +01:00
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Bastien Montagne commented 2024-02-20 11:56:47 +01:00
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Add this data as a layer attribute. It's usage was already implemented
by the modifier filtering generic code, but data itself did not yet
exist in GPv3 data.

Also add RNA accessors and handle it in conversion code.

Add this data as a layer attribute. It's usage was already implemented by the modifier filtering generic code, but data itself did not yet exist in GPv3 data. Also add RNA accessors and handle it in conversion code.
Bastien Montagne added this to the Grease Pencil project 2024-02-20 11:57:59 +01:00
Bastien Montagne requested review from Falk David 2024-02-20 11:58:15 +01:00
Bastien Montagne requested review from Hans Goudey 2024-02-20 11:58:15 +01:00
Bastien Montagne commented 2024-02-20 11:58:23 +01:00
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@blender-bot build

@blender-bot build
Falk David requested changes 2024-02-20 12:59:42 +01:00
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Thanks, just one remark.

Thanks, just one remark.
source/blender/blenkernel/intern/grease_pencil_convert_legacy.cc Outdated
@ -386,0 +389,4 @@
layer_idx = 0;
LISTBASE_FOREACH_INDEX (bGPDlayer *, gpl, &gpd.layers, layer_idx) {
layer_passes.span[layer_idx] = int(gpl->pass_index);
Falk David commented 2024-02-20 12:59:16 +01:00
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I think it's best to put this in the loop above. E.g. below new_layer.opacity = gpl->opacity;

I think it's best to put this in the loop above. E.g. below `new_layer.opacity = gpl->opacity;`
Bastien Montagne commented 2024-02-20 13:02:06 +01:00
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Is that possible? AFAICT, the loop above is adding layers one by one, can the attribute data remain valid in that context?

Is that possible? AFAICT, the loop above is _adding_ layers one by one, can the attribute data remain valid in that context?
Falk David commented 2024-02-20 13:17:23 +01:00
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Ah yea, good point. Technically it would be possible (because the layer data is getting resized when a layer is added), but let's not overcomplicate this :)
Maybe just a comment, something like: /* Write to layer attributes after all layers were created. */, could help.

Ah yea, good point. Technically it would be possible (because the layer data is getting resized when a layer is added), but let's not overcomplicate this :) Maybe just a comment, something like: `/* Write to layer attributes after all layers were created. */`, could help.
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Bastien Montagne requested review from Falk David 2024-02-20 14:16:42 +01:00
Bastien Montagne force-pushed tmp-gp-layer-index from 8bf8129c83 to 2ff5b7ed3e 2024-02-20 14:16:42 +01:00 Compare
Falk David approved these changes 2024-02-20 14:19:27 +01:00
Hans Goudey approved these changes 2024-02-20 15:05:36 +01:00
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I guess we already used the "pass" name? I find that a bit vague/short for this, but it can be tweaked outside of this PR too.

I guess we already used the "pass" name? I find that a bit vague/short for this, but it can be tweaked outside of this PR too.
source/blender/makesrna/intern/rna_grease_pencil.cc Outdated
@ -138,0 +160,4 @@
bke::SpanAttributeWriter<int> layer_passes =
grease_pencil.attributes_for_write().lookup_or_add_for_write_span<int>(
"pass", bke::AttrDomain::Layer);
layer_passes.span[layer_idx] = max_ii(0, value);
Hans Goudey commented 2024-02-20 15:05:28 +01:00
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max_ii -> std::max

`max_ii` -> `std::max`
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Bastien Montagne commented 2024-02-20 15:11:25 +01:00
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I guess we already used the "pass" name? I find that a bit vague/short for this, but it can be tweaked outside of this PR too.

@filedescriptor do we actually? AFAICT in current code in main, it's only referenced in the filtering code of modifiers... but there should be no data with that attribute currently existing?

In which case renaming should rather happen now, than later... I guess layer_index would be a better name?

> I guess we already used the "pass" name? I find that a bit vague/short for this, but it can be tweaked outside of this PR too. @filedescriptor do we actually? AFAICT in current code in `main`, it's only referenced in the filtering code of modifiers... but there should be no data with that attribute currently existing? In which case renaming should rather happen now, than later... I guess `layer_index` would be a better name?
Bastien Montagne added 1 commit 2024-02-20 15:17:03 +01:00
Falk David commented 2024-02-20 15:33:15 +01:00
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@mont29 This feature is meant to allow users to assign a "pass" number to a layer (but multiple layers could use the same "pass") to allow for arbitrary "grouping" of layers. E.g. layers with the same "pass" ID would use the same filtering in a modifier for example. Initially this was also meant to be used by the renderer to allow to render layer by passes (though that never happend).

So with that in mind, I think pass or pass_id or something of that sort could be fine.

@mont29 This feature is meant to allow users to assign a "pass" number to a layer (but multiple layers could use the same "pass") to allow for arbitrary "grouping" of layers. E.g. layers with the same "pass" ID would use the same filtering in a modifier for example. Initially this was also meant to be used by the renderer to allow to render layer by passes (though that never happend). So with that in mind, I think `pass` or `pass_id` or something of that sort could be fine.
Bastien Montagne added 2 commits 2024-02-22 11:18:37 +01:00
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69ffa3bdd7 Rename attribute to "pass_index". 
"pass" in itself is a bit too generic. Further more, legacy GP data and
RNA property are bopth using `pass index` too. Better be consistent
here.
Bastien Montagne commented 2024-02-22 11:18:49 +01:00
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@blender-bot build

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Bastien Montagne commented 2024-02-22 11:19:11 +01:00
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@filedescriptor renamed to pass_index, since it's also the RNA prop name...

@filedescriptor renamed to `pass_index`, since it's also the RNA prop name...
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Bastien Montagne changed title from GPv3: Add 'layer pass index'. to GPv3: Add layer 'pass index' attribute. 2024-02-22 11:19:51 +01:00
Bastien Montagne merged commit f15f57c5ea into main 2024-02-22 14:54:00 +01:00
Bastien Montagne deleted branch tmp-gp-layer-index 2024-02-22 14:54:02 +01:00
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