Bastien Montagne
c2e6969c56
Things like pointers to particle systems, or softbody data being stored outside of its modifier, make it impossible for internal modifier copy data code to be self-contained currently. It requires extra processing. In existing code this was handled in several different places, in several ways, and alltogether fairly inconsistently. Some cases were even not properly handled, causing e.g. crashes as in T82945. This commit addresses those issues by: * Adding comments about the hackish/unsafe parts `psys` implies when copying some modifier data (since we need to ensure particle system copying and remapping of those pointers separately). * Adding as-best-as-possible handling of those cases to `BKE_object_copy_modifier` (note that it remains fragile, but is expected to behave 'good enough' in any practical usecase). * Remove special handling for specific editor code (`copy_or_reuse_particle_system`). This should never have been accepted in ED code area, and is now handled by `BKE_object_copy_modifier`. * Factorize copying of the whole modifier stack into new `BKE_object_modifier_stack_copy`, now used by both `object_copy_data` and `BKE_object_link_modifiers`. Note that this implies that `BKE_object_copy_modifier` and `BKE_object_copy_gpencil_modifier` are now to be used exclusively to copy single modifiers. Full modifier stack copy should always use `BKE_object_modifier_stack_copy` instead. Fix T82945: Crash when dragging modifiers in Outliner. Maniphest Tasks: T82945 Differential Revision: https://developer.blender.org/D10148
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