When the source mesh doesn't have the primary layers (CD_VERT for vdata,
etc.) the returned mesh also didn't have those layers, even when non-zero
elements were requested (for example requesting 4 vertices would still
result in mvert = NULL).
This flag is copied when converting between DM and Mesh.
This flag is set to true in get_mesh(), to mimick the behaviour of
CDDM_from_mesh_ex. This is necessary for the particle system to work
correctly.
This modifier still has issues that are not related to this port:
- While editing the deformation mesh, the deformed mesh doesn't update.
This update only happens after exiting edit mode, making editing
cumbersome.
- Binding doesn't work yet. It works fine when binding in master and
loading pre-bound in 2.8. This was also an issue before this port, and
will be investigated separately.
This function creates a Mesh struct with a number of vertices/edges/etc.
It allocates the minimal number of CD layers needed.
Currently not yet used, but will be soon in the upcoming
BKE_new_mesh_from_curve_displist().
This introduces `BKE_mesh_to_bmesh_ex()`, which exposes all of the
`BMeshFromMeshParams` parameters to the caller. This is required to enable
the `calc_face_normal` flag, which is required for the Bevel modifier.
This also introduces `BKE_bmesh_to_mesh()`, which allocates a new `Mesh`,
converts the `BMesh` to it, and returns it. The returned mesh is owned by
the caller.
This commit introduces `EditMeshData`. The fields in this struct are
extracted from `EditDerivedBMesh` into their own struct `EditMeshData`,
which can then also be used by the `Mesh` struct. This allows passing
deformed vertices efficiently to the draw routines.
The modifier code constructs a new Mesh instead of writing to ob->data;
even when ob->data is a CoW copy, it can still be used by different
objects and thus shouldn't be modified by a modifier.
The depsgraph was always created within a fixed evaluation context. Passing
both risks the depsgraph and evaluation context not matching, and it
complicates the Python API where we'd have to expose both which is not so
easy to understand.
This also removes the global evaluation context in main, which assumed there
to be a single active scene and view layer.
Differential Revision: https://developer.blender.org/D3152
For correct results these must have been set already when the depsgraph was
created and evaluated, so all dependencies have appropriate resolutions too.
For particle we no longer backup and restore the viewport particles to avoid
overwriting them during render, as copy-on-write solves this for us. Even
without COW particles seem to work ok.
This also removes the particle simplification options based on camera. This
was never used much and only available in Blender Internal.
Differential Revision: https://developer.blender.org/D3148
