Blender Git Commits

Make UV coords and face normals optional to write

Adds options in the UI for writing normals and UV coordinates to
the OBJ file.
{F8627897}

As expected, calculating both of them is also skipped conditionally.
However, the memory for normals is still allocated; just not used.

Add scaling factor in geometry transform.

Merge branch 'master' into soc-2020-io-performance

Add forward and up axes transform in preferences.

Fix crash: exporting object from Edit mode.

Make all frames exportable; UI & filename changes

All frames are now exportable including negative ones, instead of
only 0-1000.

Added checkbox for Animation for better UI {F8622012}

File name doesn't contain frame name if no animation is being exported.

Noticed that `source/blender/io/wavefront_obj/IO_wavefront_obj.h` is
missing in the IDE's edited files list. So edited that in.

Merge branch 'master' into soc-2020-io-performance

Cleanup: unused headers, minor edits in comments

Since fstream was removed, these headers are useless here.

Export multiple frames to separate files.

Frame 20 with mentioned filename `name` is exported to `name020.obj`
It should be modified to exclude cases when a single frame is being
exported to avoid overwriting what the user intended to name it.

Also a filter is added to include only OB_MESH type objects for export.

The limits on frames can be changed, the current limits are like this:
Let's say unknowingly, the user selects the maximum 1000 frames & every
file is 1 MB in size. That will quickly fill up 1 GB on the disk.
More frames add to this risk.

Cleanup: function & variable renaming; comments.

Fix indices with offset for multiple objects.

In case of multiple objects, the vertex, normal, and UV vertex indices
keep adding up for every upcoming object.

Export mutiple objects; remove unused fstream.

Adds support for multiple objects to be exported from a frame.
Also checks for them to be OB_MESH types. More object types need to be
supported yet.

Renamed data_to_export to more fitting, object_to_export of which we
use vector to contain all exportable objects.

Remove unused fstream based file writer since fprintf is consistently
faster.

Also reduce function calls of fprintf since lengthy arguments were
already removed.

Merge branch 'master' into soc-2020-io-performance

Change export time resolution to milliseconds

Fix out of bounds assert and crash in UV vector.

Export UV vertex coordinates & their indices.

This commit adds support for UV vertex coordinates in the form:
`vt u v` for all vertices in the texture map.

Also, their indices are exported as per file format specification [1,2]
`f */vt1/* */vt2/*` for all polygons.

The text written by this and the python exporter has different order
of coordinates and thus their indices too. So direct diff of the two
files will not work.

Minor comments about 0-based/ 1-based indices are also added.

[1]: https://en.wikipedia.org/wiki/Wavefront_.obj_file#File_format
[2]: http://www.martinreddy.net/gfx/3d/OBJ.spec

Comment about mvert normals memory allocation.

Readability: Replace integers to indicate axes with AXIS_{X,Y,Z}.

Consistency: Use uint with indices, like the vectors of the indices
themselves.

Add faster fprintf writer, remove unused headers

Changes here:

Reverted temporarily to std::vector to keep working, instead of
waiting for D7931 to get committed in master.

Adds an forced inline function for calculation of face/ polygon normals
by averaging vertex normals. I will look for an existing method.
This way, the allocated memory in `data_to_export->mvert[i].no` is
actually used.
Also, `BLI::Vector<uint> face_normal_index` is not needed anymore since
we loop over the same polygon list while writing normals, so
their indices will be the same.

Adds a writer method option, `fprintf`, which is faster than `fstream`.
With fstream, 478 MB of an ico-sphere with 8 subsurf takes 22 seconds.
with fprintf, the same takes 13 seconds.
With fstream, a 44 MB of cube with 8 subsurf take 2.3 seconds.
with fprintf, the same takes 1.4 seconds.

Adds timing info of the full export directly in console.

Removed unused and repeated headers from `wavefront_obj.cc`.

Differential Revision: https://developer.blender.org/D7959

Move iteration variable inside the loops.

To limit the scope & for better naming, moved the variables
`MVert *vertex` and `const Polygon &polygon` inside the loops.

Formatting, edit comments, remove extra io::obj

Changes here:

Made variables `vertex` & `polygon` for better readability in writer.
`data_to_export->mvert`
`data_to_export->polygon_list`

Edited comments as per review in D7918.

Removed extraneous `io::obj::` being used in the same namespace.