[Blender] Support bundled ZIP format distrubtion

.gitignore

@@ -16,3 +16,4 @@ rendered
 particles_*
 sim_*
 *.bin
+/build

blender/__init__.py

@@ -24,12 +24,35 @@
     pass
 
 if use_blender:
-    from . import addon
+    import sys
+    import os
 
-    def register():
-        addon.register()
+    bundle_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'bundle')
 
-    def unregister():
-        addon.unregister()
+    if os.path.exists(bundle_path):
+        def register():
+            print('Found Taichi-Elements/bundle at', bundle_path)
+            if bundle_path not in sys.path:
+                sys.path.insert(0, bundle_path)
+            # import addon after path is inserted, so that `import taichi` works
+            from . import addon
+            addon.register()
+
+        def unregister():
+            from . import addon
+            addon.unregister()
+            if bundle_path in sys.path:
+                sys.path.remove(bundle_path)
+
+    else:
+        print('Cannot find Taichi-Elements/bundle, assuming PyPI install.')
+
+        from . import addon
+
+        def register():
+            addon.register()
+
+        def unregister():
+            addon.unregister()
 
 # Otherwise act as a PyPI package

blender/requirements.txt

@@ -0,0 +1,6 @@
+astor
+colorama
+dill
+pybind11>=2.5.0
+sourceinspect>=0.0.3
+taichi

make_bundle.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+rm -rf build/Taichi-Elements
+mkdir -p build/Taichi-Elements/bundle
+python3 -m pip install --no-deps -r blender/requirements.txt -t build/Taichi-Elements/bundle
+cp -r blender/* build/Taichi-Elements
+cp -r engine build/Taichi-Elements
+rm -rf build/Taichi-Elements/bundle/include
+rm -rf build/Taichi-Elements/bundle/*.dist-info
+rm -rf build/Taichi-Elements/bundle/bin
+rm -f build/Taichi-Elements.zip
+cd build && zip -r Taichi-Elements.zip Taichi-Elements