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Fix: Curves extrude with all points selected #117095

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Hans Goudey merged 3 commits from laurynas/blender:fix-curves-extrude into main 2024-01-16 21:59:25 +01:00
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Laurynas Duburas commented 2024-01-13 18:02:35 +01:00
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CurvesGeometry has no ".selection" attribute when all control points
are selected. The earlier code assumed that the attribute always exists.
Also Python tests are added for the "extrude" operator.

CurvesGeometry has no ".selection" attribute when all control points are selected. The earlier code assumed that the attribute always exists. Also Python tests are added for the "extrude" operator.
curves_extrude.blend
891 KiB
Laurynas Duburas added 1 commit 2024-01-13 18:02:48 +01:00
ef3ba6dfa2 Fix: Curves extrude with all points selected 
CurvesGeometry has no ".selected" attribute when all control points are selected.
The earlier code assumed that ".selected" always exists.
Also Python test is added for "extrude" operator.
Laurynas Duburas requested review from Hans Goudey 2024-01-13 18:03:07 +01:00
Hans Goudey reviewed 2024-01-16 16:55:27 +01:00
Hans Goudey left a comment
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I wonder if a simpler solution is checking whether extruded_points.size() == curves.points_num(). Then the extrude code won't do anything I think, right?

I wonder if a simpler solution is checking whether `extruded_points.size() == curves.points_num()`. Then the extrude code won't do anything I think, right?
source/blender/editors/curves/intern/curves_extrude.cc Outdated
@ -277,3 +278,3 @@
const bke::AttributeAccessor src_attributes = curves.attributes();
const GVArraySpan src_selection = *src_attributes.lookup(".selection", bke::AttrDomain::Point);
const bool true_ = true;
Hans Goudey commented 2024-01-16 16:54:45 +01:00
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By passing CD_PROP_BOOL, the attribute will always be read as a boolean (using implicit conversions if necessary).

By passing `CD_PROP_BOOL`, the attribute will always be read as a boolean (using implicit conversions if necessary).
Laurynas Duburas commented 2024-01-16 19:30:09 +01:00
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I wonder if a simpler solution is checking whether extruded_points.size() == curves.points_num(). Then the extrude code won't do anything I think, right?

No. It will append one point at both ends. And this also applies if there is more than one curve: each will get two new points.

What if to return back to always check extruded_points.size() == curves.points_num() and then either lookup(const AttributeIDRef &attribute_id, const AttrDomain domain) or GVArray::ForSingle(const CPPType &type, const int64_t size, const void *value) ?
Or maybe check if lookupreturns empty GAttributeReaderthen call GVArray::ForSingle

> I wonder if a simpler solution is checking whether `extruded_points.size() == curves.points_num()`. Then the extrude code won't do anything I think, right? No. It will append one point at both ends. And this also applies if there is more than one curve: each will get two new points. What if to return back to always check `extruded_points.size() == curves.points_num()` and then either `lookup(const AttributeIDRef &attribute_id, const AttrDomain domain)` or `GVArray::ForSingle(const CPPType &type, const int64_t size, const void *value)` ? Or maybe check if `lookup`returns empty `GAttributeReader`then call `GVArray::ForSingle`
Hans Goudey commented 2024-01-16 19:34:58 +01:00
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Ah, right, of course. That might work, but this seems a bit simpler maybe?

GVArray src_selection = *attributes.lookup(".selection", bke::AttrDomain::Point);
if (!src_selection) {
  src_selection = VArray<bool>::ForSingle(true, curves.points_num());
}
Ah, right, of course. That might work, but this seems a bit simpler maybe? ```cpp GVArray src_selection = *attributes.lookup(".selection", bke::AttrDomain::Point); if (!src_selection) { src_selection = VArray<bool>::ForSingle(true, curves.points_num()); }
👍 1
Laurynas Duburas added 2 commits 2024-01-16 20:17:22 +01:00
Laurynas Duburas commented 2024-01-16 20:19:12 +01:00
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Changed, but had to add conversion:

const GVArraySpan src_selection = src_selection_array;
Changed, but had to add conversion: ```c const GVArraySpan src_selection = src_selection_array; ```
👍 1
Hans Goudey approved these changes 2024-01-16 21:58:08 +01:00
Hans Goudey merged commit a6fd1f5034 into main 2024-01-16 21:59:25 +01:00
Laurynas Duburas deleted branch fix-curves-extrude 2024-01-16 22:15:25 +01:00
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