update Collada Importer: reworked export and import of Materials

- 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 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/collada/BlenderTypes.h b/source/blender/collada/BlenderTypes.h
index 22ad9b8c1e0..0e024be2374 100644
--- a/source/blender/collada/BlenderTypes.h
+++ b/source/blender/collada/BlenderTypes.h
@@ -23,6 +23,7 @@
 
 typedef float(Vector)[3];
 typedef float(Quat)[4];
+typedef float(Color)[4];
 typedef float(Matrix)[4][4];
 typedef double(DMatrix)[4][4];