Remove `const` from pass-by-value parameters in function declarations.
The variables passed as parameters can never be modified by the function
anyway, so declaring them as `const` is meaningless. Having the
declaration there could confuse, especially as it suggests it does have
a meaning, training people to write meaningless code.
This will help detecting missing API changes. Those keywords were added
on classes which did not already use them. Also added missing
`accepts_object_type()` on NURBS reader.
Point clouds are not imported and read anymore. This was caused by an
API change in rB128eb6cbe928e58dfee1c64f340fd8d663134c26 which was not
applied to `AbcPointsReader`. It did not cause a compile error as the
base class as a default implementation for this method.
This commit only moves code into the `blender::io::alembic` namespace,
it does not move `static` functions into an anonymous namespace.
No functional changes.
This moves the `alembic`, `avi`, `collada`, and `usd` modules into a common
`io` directory.
This also cleans up some `#include "../../{somedir}/{somefile}.h"` by
adding `../../io/{somedir}` to `CMakeLists.txt` and then just using
`#include "{somefile}.h"`.
No functional changes.
