[x3d-public] Can you get this X3D animation imported into Blender?

[John Carlson]

Followup, not solved yet.

For the base Blender .wrl importer, I made the following changes:

diff --git a/io_scene_x3d/import_x3d.py b/io_scene_x3d/import_x3d.py
index 4c215516..0d8337a1 100644
--- a/io_scene_x3d/import_x3d.py
+++ b/io_scene_x3d/import_x3d.py
@@ -3347,9 +3347,9 @@ def translateOrientationInterpolator(node, action,
ancestry):

         mtx = translateRotation((x, y, z, w))
         eul = mtx.to_euler()
-        rot_x.keyframe_points.insert(time, eul.x)
-        rot_y.keyframe_points.insert(time, eul.y)
-        rot_z.keyframe_points.insert(time, eul.z)
+        rot_x.keyframe_points.insert(time * 250, eul.x)  # end to 250
frames so we can see the motion
+        rot_y.keyframe_points.insert(time * 250, eul.y)
+        rot_z.keyframe_points.insert(time * 250, eul.z)

     for fcu in (rot_x, rot_y, rot_z):
         for kf in fcu.keyframe_points:
@@ -3611,7 +3611,7 @@ def load_with_profiler(
     import cProfile
     import pstats
     pro = cProfile.Profile()
-    pro.runctx("load_web3d(context, filepath, PREF_FLAT=True, "
+    pro.runctx("load_web3d(context, filepath, PREF_FLAT=False, "
                "PREF_CIRCLE_DIV=16, global_matrix=global_matrix)",
                globals(), locals())
     st = pstats.Stats(pro)
@@ -3628,7 +3628,7 @@ def load(context,

     # loadWithProfiler(operator, context, filepath, global_matrix)
     load_web3d(context, filepath,
-               PREF_FLAT=True,
+               PREF_FLAT=False,
                PREF_CIRCLE_DIV=16,
                global_matrix=global_matrix,
                )
===============================================================================
The latter allows Object EMPTYs to be created (Transforms) so there can be
local rotations (looks like  a Blender requirement).  This also offsets the
box on the right too much, and there's an extra bend due to the EMPTY.  But
looking at the object hierarchy (not the transforms) looks okay.  But look
closely at the location.  Those have not changed, so everything is locally
transformed.

What I am seeing is 2 ninety degree rotations.  Two systems treat them
differently.  One rotates the objects by 90 degrees, and children, but in
Blender, Transforms are given an actual location.  So one can subtract the
offset between the Transform and the box, but then first and third cubes
land on top of each other.

It's still an interesting puzzle to look at.  This is by no means solved.
I think it's similar to the rotation/revolution problem around the sun:

https://www.youtube.com/watch?v=FUHkTs-Ipfg (Veritasium)

Ideally, there would be no offset between the "TransformTargetChild" and
the Shape in Blender.  Somehow, the shape is inheriting the offset of its
parent, and offseting 4 m from the transform.  Hmm

                        <Transform DEF="TransformTargetChild"
translation="4 0 0">
                                <Shape>
                                        <Box/>
                                </Shape>
                        </Transform>

I am also attaching my current test files, the major change was to change
set_rotation to rotation in two places to match the importer (oops, extend
the importer).

If someone wants to play with my "improved" Blender addon, let me know,
otherwise, I'd like to see this fixed in the original Blender plugin.  I
don't have a solution yet.

John



On Tue, Jun 4, 2024 at 9:45 PM John Carlson <yottzumm at gmail.com> wrote:

> One thing you will notice right away, perhaps, is that the ROUTEs aren’t
> imported.  Perhaps converting to VRML97 will work, I’ve not tried that, I
> just went full steam ahead at importing XML.
>
> John
>
> On Tue, Jun 4, 2024 at 8:37 PM John Carlson <yottzumm at gmail.com> wrote:
>
>> Challenge:
>>
>> Can you get this X3D animation and box translations imported into Blender
>> properly?
>>
>> If you can, I'll give you a big fat kiss  (kidding!).
>>
>> Looks simple, right?
>>
>> Please provide any diffs to your favorite X3D Blender importer.
>>
>> Attached example (run in your favorite X3D browser to see
>> desired results).
>>
>> Thanks!  This will likely help out my efforts a lot!
>>
>> John
>>
>
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