First pass at SharedMesh export

korman/exporter/mesh.py

@@ -270,6 +270,10 @@ class MeshConverter(_MeshManager):
                 dspan.composeGeometry(True, True)
             inc_progress()
 
+    def _is_shared_mesh(self, bo):
+        cm = bo.plasma_modifiers.clothing_mesh
+        return cm.enabled
+
     def _export_geometry(self, bo, mesh, materials, geospans):
         # Recall that materials is a mapping of exported materials to blender material indices.
         # Therefore, geodata maps blender material indices to working geometry data.
@@ -491,7 +495,7 @@ class MeshConverter(_MeshManager):
                 drawables = self._export_mesh(bo)
 
         # Create the DrawInterface
-        if drawables:
+        if drawables and not self._is_shared_mesh(bo):
             diface = self._mgr.find_create_object(plDrawInterface, bl=bo)
             for dspan_key, idx in drawables:
                 diface.addDrawable(dspan_key, idx)
@@ -517,6 +521,15 @@ class MeshConverter(_MeshManager):
         # Step 2: Export Blender mesh data to Plasma GeometrySpans
         self._export_geometry(bo, mesh, materials, geospans)
 
+        if self._is_shared_mesh(bo):
+            # Step 3: Add plGeometrySpans to a plSharedMesh object
+            shared = self._mgr.find_create_object(plSharedMesh, bl=bo)
+            shared.flags |= plSharedMesh.kDontSaveMorphState
+            for geospan, pass_index in geospans:
+                geospan.props |= (plGeometrySpan.kRequiresBlending | plGeometrySpan.kPropForceShadow)
+                shared.addSpan(geospan)
+            return shared
+        else:
             # Step 3: Add plGeometrySpans to the appropriate DSpan and create indices
             _diindices = {}
             for geospan, pass_index in geospans:

korman/properties/modifiers/avatar.py

@@ -24,6 +24,19 @@ from ...helpers import find_modifier
 from ... import idprops
 
 
+class PlasmaClothingMeshModifier(PlasmaModifierProperties):
+    pl_id = "clothing_mesh"
+
+    bl_category = "Avatar"
+    bl_label = "Clothing Mesh"
+    bl_description = "Mesh for a Clothing Item"
+    bl_icon = "MOD_CLOTH"
+
+    def export(self, exporter, bo, so):
+        # This is handled in the mesh exporter code
+        pass
+
+
 class PlasmaLadderModifier(PlasmaModifierProperties):
     pl_id = "laddermod"
 

korman/ui/modifiers/avatar.py

@@ -17,6 +17,9 @@ import bpy
 
 from ...helpers import find_modifier
 
+def clothing_mesh(modifier, layout, context):
+    pass
+
 def laddermod(modifier, layout, context):
     layout.label(text="Avatar climbs facing negative Y.")