chaoticbob / cinder-3dtools Goto Github PK

I'll put that also in a PR but in the meantime here's my version of the left/right hand conversion. I believe that it is correct:

# rescale the position and negate the z component
self.translation = [ trans.x * _c4d.UNIT_SCALE,  trans.y * _c4d.UNIT_SCALE, -trans.z * _c4d.UNIT_SCALE ]
# extract the HPB angles, invert x and y and negate the z component
hpb = self.obj.GetRelRot()
xyz = c4d.Vector( hpb.y, hpb.x, -hpb.z )
# transform each component into rotation matrices
rotX = c4d.utils.RotAxisToMatrix( c4d.Vector( 1, 0, 0 ), xyz.x )
rotY = c4d.utils.RotAxisToMatrix( c4d.Vector( 0, 1, 0 ), xyz.y )
rotZ = c4d.utils.RotAxisToMatrix( c4d.Vector( 0, 0, 1 ), xyz.z )
# apply the transform in reversed YXZ order
rh_mat = rotZ * rotX * rotY
# transform the resulting matrix to a quaternion
quat = c4d.Quaternion()
quat.SetHPB( c4d.utils.MatrixToHPB( rh_mat ) )
self.rotation = [quat.v.x, quat.v.y, quat.v.z, quat.w]

Here's a really basic scene that has some issues with material parsing. There's 5 cubes and 5 materials, but once loaded by gltf::File, it appears that only one of the 5 materials get assigned to the last mesh.

https://gist.github.com/simongeilfus/58683a4540bcb575cf5841f0a36a27f7#file-materials_c4d-json
https://www.dropbox.com/s/q90nrltyl8olqx2/Materials_c4d.rar?dl=0

Is there an easy way to append a bitmap buffer instead of a file path? Having this would allow to export pretty much any material from Cinema4D including procedural ones or substance designer materials.

I have the material bitmap rendering code ready, so if someone can point me in the right direction I could easily add this feature.

This is a bit confusing but C4D's diffusion has nothing to do with the diffuse color. It is quite different and often used to add an ambient occlusion map to a material.

https://github.com/ryanbartley/Cinder-3DTools/blob/GltfExport/pysrc/cinder/C4DObjects.py#L95

I've corrected that locally in my fork, I will put that in a PR asap.