MeshSequenceCache modifier not available in dropdown for Curves (Hair) object #128746

New Issue

Lukas W · 2024-10-08T11:01:22+02:00

Lukas W commented

2024-10-08 11:01:22 +02:00

System Information
Operating system: GNU/Linux Ubuntu 24.04.1 LTS
Graphics card: NVIDIA GeForce MX150

Blender Version
Broken: 4.2.2
Worked: didn't test / probably never

Short description of error

On a Curves (not Curve) object, the MeshSequenceCache modifier is not available from the "Add Modifier" dropdown.

However, the Alembic importer adds such a modifier onto the Curves objects it creates. It is also possible to transfer such a modifier from another object, regardless of its type.
Thus, this seems not to be an issue of compatibility of the modifier with the Curves object type, but an UI/UX oversight. The new Curves object supports only Geometry Nodes, however the functionality offered by MeshSequenceCache is not available in GN.

Exact steps for others to reproduce the error
Based on the default startup

Add -> Curve -> Empty Hair
Navigate to modifier tab in Properties area
Click "Add Modifier" and look for MeshSequenceCache

however

Select default cube
Click "Add Modifier" and add MeshSequenceCache
Add "Curves" object to selection, keep default cube as active object
Click dropdown on MeshSequenceCache modifier and choose "Copy To Selected"
The previously unavailable modifier has now been applied to "Curves"

**System Information** Operating system: GNU/Linux Ubuntu 24.04.1 LTS Graphics card: NVIDIA GeForce MX150 **Blender Version** Broken: 4.2.2 Worked: didn't test / probably never **Short description of error** On a Curves (not Curve) object, the MeshSequenceCache modifier is not available from the "Add Modifier" dropdown. However, the Alembic importer adds such a modifier onto the Curves objects it creates. It is also possible to transfer such a modifier from another object, regardless of its type. Thus, this seems not to be an issue of compatibility of the modifier with the Curves object type, but an UI/UX oversight. The new Curves object supports only Geometry Nodes, however the functionality offered by MeshSequenceCache is not available in GN. **Exact steps for others to reproduce the error** Based on the default startup - Add -> Curve -> Empty Hair - Navigate to modifier tab in Properties area - Click "Add Modifier" and look for MeshSequenceCache however - Select default cube - Click "Add Modifier" and add MeshSequenceCache - Add "Curves" object to selection, keep default cube as active object - Click dropdown on MeshSequenceCache modifier and choose "Copy To Selected" - The previously unavailable modifier has now been applied to "Curves"

Lukas W added the

labels 2024-10-08 11:01:23 +02:00

Philipp Oeser commented

2024-10-08 13:20:13 +02:00

Can confirm.

Seems like BKE_object_support_modifier_type_check has correct check already, so we probably dont need a new flag like eModifierTypeFlag_AcceptsCurves?

Just adding a case for CURVES in OBJECT_MT_modifier_add seems to be enough, will double-check...

Can confirm. Seems like `BKE_object_support_modifier_type_check` has correct check already, so we probably dont need a new flag like `eModifierTypeFlag_AcceptsCurves`? Just adding a case for CURVES in `OBJECT_MT_modifier_add` seems to be enough, will double-check...

Philipp Oeser added

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MeshSequenceCache modifier not available in dropdown for Curves (Hair) object #128746