blend2bam

blend2bam is a CLI tool to convert Blender 2.80+ blend files to Panda3D BAM files. It also supplies a Python file loader to add "native" blend file support to Panda3D.

Features

The following are supported:

• Static Meshes
• Materials¹
• Textures
• Lights
• Skinned Meshes
• Shape Keys
• Skeletal Mesh Animations
• Shape Key Animations ²
• Separate Animation Files
• Collision Shapes ³
• Tags from Custom Properties
• Convert Particle Systems to Meshes

¹ The focus is on PBR materials with limited support for "legacy" materials. For legacy materials, only diffuse color (pulled from base color) and normal maps are supported.

² Shape key animations require Panda3D 1.10.6+

³ Collision shapes are generated from Blender's rigid body properties and shapes can be built for either Bullet or Panda3D's builtin collision system

Some notable missing features are:

• Object Animations
• Multiple Diffuse/Base Color Textures

The conversion guide provides information on how Blender data gets converted to Panda3D data and any gotchas.

Installation

Use pip to install the panda3d-blend2bam package:

pip install panda3d-blend2bam

Blender 2.80+ is required for blend2bam (ideally available on the system PATH). If it is not, the directory containing blender can be specified with --blender-dir (see CLI usage).

Usage

CLI

usage: blend2bam [-h] [--version] [-v] [-m {legacy,pbr}] [--physics-engine {builtin,bullet}] [--srcdir SRCDIR] [--blender-dir BLENDER_DIR] [--blender-bin BLENDER_BIN]
                 [--append-ext] [--no-srgb] [--textures {ref,copy,embed}] [--animations {embed,separate,skip}] [--invisible-collisions-collection INVISIBLE_COLLISIONS_COLLECTION]
                 [--allow-double-sided-materials] src [src ...] dst

CLI tool to convert Blender blend files to Panda3D BAM files

positional arguments:
  src                   source path
  dst                   destination path

options:
  -h, --help            show this help message and exit
  --version             show program's version number and exit
  -v, --verbose         print out extra information (default: False)
  -m {legacy,pbr}, --material-mode {legacy,pbr}
                        control how materials are exported (default: pbr)
  --physics-engine {builtin,bullet}
                        the physics engine to build collision solids for (default: builtin)
  --srcdir SRCDIR       a common source directory to use when specifying multiple source files (default: None)
  --blender-dir BLENDER_DIR
                        directory that contains the blender binary (default: )
  --blender-bin BLENDER_BIN
                        name of the blender binary to use (default: blender)
  --append-ext          append extension on the destination instead of replacing it (batch mode only) (default: False)
  --no-srgb             do not load textures as sRGB textures (default: False)
  --textures {ref,copy,embed}
                        how to handle external textures (default: ref)
  --animations {embed,separate,skip}
                        how to handle animation data (default: embed)
  --invisible-collisions-collection INVISIBLE_COLLISIONS_COLLECTION
                        name of a collection in blender whose collision objects will be exported without a visible geom node (default: InvisibleCollisions)
  --allow-double-sided-materials
                        allow exporting double-sided materials (otherwise force all materials to be single-sided) (default: False)

Python File Loader

blend2bam also supports Panda3D's Python file loader API (requires Panda3D 1.10.4+) to seamlessly adds blend file support to Panda3D's Loader classes. This does not add support to pview, which is a C++ application that does not support Python file loaders.

Running Tests

First install blend2bam in editable mode along with test extras:

pip install -e .[test]

Then run the test suite with pytest:

python -m pytest

Building Wheels

Install build:

pip install --upgrade build

and run:

python -m build

License

MIT