Morph targets vertices array in Blender exporter wrong

[inear]

In the Blender Export 4.4 there is an issue with the vertices of morph targets. They are parsed as triplets of arrays: [[x,y,z],[x,y,z],...] but should be one singel array [x,y,z,x,y,z].

I'm not good enough with python to make the change, but I think it's extend([vertex.co.x, vertex.co.y, vertex.co.z]) that should be extend((vertex.co.x, vertex.co.y, vertex.co.z)) on line 409 in mesh.py.

I't worked for me when changing in the exported json object directly.

[inear]

No, it was the morph.append([co.x, co.y, co.z]) in def blend_shapes( that should be extend instead. But let me know if I'm using "blend shapes" and "morph targets" in a wrong way. I don't understand the difference since both output morph-targets.

[AndrewRayCode]

Just hit this too, all of the examples use a flat array of verts. @mrdoob this isn't an enhancement, it's currently impossible to export morph targets from blender. Ping @phfatmonkey

Did this ever work? How did any of the example files like http://threejs.org/examples/models/animated/horse.js with a flat list of verts get built? the blend file for that example isn't in this repo.

[AndrewRayCode]

I made a small script to flatten the vertex array of your output json file. It modifies the file in place. use at your own risk! https://gist.github.com/DelvarWorld/15340499495afea654e45d9ace113d28

[mrdoob]

Did this ever work? How did any of the example files like http://threejs.org/examples/models/animated/horse.js with a flat list of verts get built? the blend file for that example isn't in this repo.

That file was not done with Blender. It was done in Maya, exported as a series of OBJs and combined using the converter: https://github.com/mrdoob/three.js/blob/master/utils/converters/obj/convert_obj_three.py

[donmccurdy]

Closing as duplicate of #8710, which has more recent updates.