The official Blender project repository.
Charles Flèche
0df5d8220b
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When importing an USD, the Blender object names do not necessarily match
Prim names:
```
#usda 1.0
def Xform "xform1"
{
def Mesh "MyObject" # Will be imported as "MyObject"
}
def Xform "xform2"
{
def Mesh "MyObject" # Will be imported as "MyObject.001"
}
def Xform "xform2"
{
def Mesh "MyObject" # Will be imported as "MyObject.002"
}
```
This makes it difficult in the [USD Import Hooks]
(https://docs.blender.org/api/current/bpy.types.USDHook.html) to link a
Blender object back to its source Prim for additional processing. A
typical use cases for games is to generate UVs, create and apply a
material on the fly when importing a collision shape that does not have
a visual representation (hence no materials) based on some Prim
attributes, but that the artist needs to differenciate in Blender's
viewport.
The Import context exposes a new method `get_prim_map()` that returns a
`dict` of `prim path` / `list of Blender ID`.
For example, given the following USD scene,
```
/
|--XformThenCube [def Xform]
| `--Cube [def Cube]
|--XformThenXformCube [def Xform]
| `--XformIntermediate [def Xform]
| `--Cube [def Mesh]
|--Cube [def Cube]
`--Material [def Material]
`--Principled_BSDF [def Shader]
```
the `get_prim_map()` method will return a map as:
```python
@static_method
def on_import(import_context):
pprint(import_context.get_prim_map())
```
```json
{
"/Cube": [bpy.data.objects["Cube.002"], bpy.data.meshes["Cube.002"]],
"/XformThenCube": [bpy.data.objects["XformThenCube"]],
"/XformThenCube/Cube": [bpy.data.objects["Cube"], bpy.data.meshes["Cube"]],
"/XformThenXformCube": [bpy.data.objects["XformThenXformCube"]],
"/XformThenXformCube/XformIntermediate": [bpy.data.objects["XformIntermediate"]],
"/XformThenXformCube/XformIntermediate/Cube": [bpy.data.objects["Cube.001"], bpy.data.meshes["Cube.001"]],
"/Material": [bpy.data.materials["Material"]],
}
```
Co-authored-by: Odréanne Breton <odreanne.breton@ubisoft.com>
Co-authored-by: Sttevan Carnali Joga <sttevan.carnali-joga@ubisoft.com>
Co-authored-by: Charles Flèche <charles.fleche@ubisoft.com>
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| .gitea | ||
| .github | ||
| build_files | ||
| doc | ||
| extern | ||
| intern | ||
| lib | ||
| locale | ||
| release | ||
| scripts | ||
| source | ||
| tests | ||
| tools | ||
| .clang-format | ||
| .clang-tidy | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitignore | ||
| .gitmodules | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| COPYING | ||
| GNUmakefile | ||
| make.bat | ||
| pyproject.toml | ||
| README.md | ||
Blender
Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing.
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