Some external tools seem to have issues with the definition
of Collada <transparency> - a float value in range (0,1).
However it is possible to use the <transparent> color as a container
for the <transparency> value. This seems to be a more reliable
method to export transparency values from Blender PBSDF Shaders.
The relevant documentation is in the collada 1.14 reference manual,
page 7-5 about the usage of transparent and transparency.
This fix makes export and import of the <transparency>
and <transparent> values more convenient and more reliable.
Reviewers: brecht, jesterking
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D5305
Fixed: The Collada Exporter only supports export of
Lambert Shaders. But Shininess is not supported with
Lambert Shaders. The exporter must not add Shininess
to the Shader data!
Fixed: The Collada Importer adds an illegal value of -1
for reflectivity when this parameters is not defined in
the imported collada data. Now reflectivity is only
set when the import data contains a valid value.
Discarded: The Collada Importer handles shininess in a
dubious way. I have discarded import for now.
This needs to be reworked carefully in 2.81.
Differential Revision: https://developer.blender.org/D5262
- added import of transparency and emission into principled BSDF Shader
- added support for importing all default collada material parameters
* diffuse
* emission
* index_of_refraction
* shininess (mapped to BSDF Roughness)
* reflectivity (mapped to BSDF Metallic)
* transparency + transparent mapped to BSDF Alpha)
* ambient (creates unconnected texture node)
* specular (creates unconnected texture node)
* reflective(creates unconnected texture node)
- added support for exporting collada material parameters:
* diffuse
* emission
* index_of_refraction
* shininess (mapped to BSDF Roughness)
* reflectivity (mapped to BSDF Metallic)
* transparency + transparent mapped to BSDF Alpha)
- prepared support for exporting the following parameters
but currently commented out:
* ambient (creates unconnected texture node)
* specular (creates unconnected texture node)
* reflective(creates unconnected texture node)
Problem: For now we only allow export of principled BSDF based
materials. I am not sure from where to get ambient, specular
and reflective as those values are not included in the
principled BSDF Shader (wip).
1.) The Blender order of applying transforms is:
Scale
Rotation
Transformation
Reasoning: This order ensures there is no shearing, which happens
when you do scaling after rotation, see also:
https://blender.stackexchange.com/questions/1806
The Collada exporter now exports in the order how the transforms
need to be applied upon import.
2.) Also removed obsolete #if 0 lines
Currently we can not export Decompsed Transforms in combination with
Armature asnimations. As a temporary workaround enforce export
of transformations as Matrix for armature objects.
The collada exporter allows to export transforms either as Matrix
or as a decomposition of Translation, Rotation aand Scale.
The decomposition option was falsely named "TransRotLoc".
I renamed it to the much more descriptive word "Decomposed".
The tooltip already contains sufficient information, so there
is no need to change that.
When exporting an object we can choose the transformation type 'Matrix'
or 'trans/rot/scale' When exporting an animation we have the same choice
regarding the used transformation type.
However we must make sure that animations and objects use the same
transformation type within one colleda export. The user interface is
now reworked such that the correct settings are always guaranteed.
I also reworked the tool tips
Added new feature: Collada: global axis rotation upon export (UI)
The new feature allows to specify the target rest coordinate system upon export.
This allows for example to export a character that is in Blender orientation (Y forward)
to match the Secondlife orientation where (-X forward)
- Refactor:Added new utility methods to collada_utils
Made BCMatrix class more powerfull
moved Blender related structures into new BlenderContext class
added class wrapper to encapsulate ExportSettings structure
Added blender context getters to ExportSettings
added access methods to BlenderContext into ExportSettings class
Moved class BCMatrix into BlenderContext
moved utility functions from collada_util into BlenderContext
replace own function for parenting by a call to ED_object_parent_set()
- Cleanup: removed obsolete parameters from methods
renamed parameters for better understanding
cleanup whitespace and indentation
removed obsolete comments
