The experimental cutting tool now supports a bisect mode for batch cuts

src/bonsai/bonsai/bim/module/misc/operator.py

@@ -125,15 +125,25 @@ class SplitAlongEdge(bpy.types.Operator, tool.Ifc.Operator):
         "Will unassign element from a type if type has a representation."
     )
     bl_options = {"REGISTER", "UNDO"}
+    mode: bpy.props.StringProperty()
 
     @classmethod
     def poll(cls, context):
-        return context.selected_objects and tool.Ifc.get()
+        return context.selected_objects
 
     def _execute(self, context):
         cutter = context.active_object
         objs = [o for o in context.selected_objects if o != cutter]
 
+        if not tool.Ifc.get():
+            if self.mode == "BOOLEAN":
+                tool.Misc.boolean_objects_with_cutter(objs, cutter)
+            elif self.mode == "BISECT":
+                tool.Misc.bisect_objects_with_cutter(objs, cutter)
+                for obj in objs:
+                    bpy.data.objects.remove(obj)
+            return
+
         objs_to_cut = []
         # Splitting only works on meshes
         for obj in objs:
@@ -169,7 +179,11 @@ class SplitAlongEdge(bpy.types.Operator, tool.Ifc.Operator):
 
             objs_to_cut.append(obj)
 
-        new_objs = tool.Misc.split_objects_with_cutter(objs_to_cut, cutter)
+        if self.mode == "BOOLEAN":
+            new_objs = tool.Misc.boolean_objects_with_cutter(objs_to_cut, cutter)
+        elif self.mode == "BISECT":
+            new_objs = tool.Misc.bisect_objects_with_cutter(objs_to_cut, cutter)
+
         for obj in new_objs:
             bonsai.core.root.copy_class(tool.Ifc, tool.Collector, tool.Geometry, tool.Root, obj=obj)
             bpy.ops.bim.update_representation(obj=obj.name)

src/bonsai/bonsai/bim/module/misc/ui.py

@@ -39,8 +39,9 @@ class BIM_PT_misc_utilities(bpy.types.Panel):
         row = layout.split(factor=0.2, align=True)
         row.prop(props, "total_storeys", text="")
         row.operator("bim.resize_to_storey").total_storeys = props.total_storeys
-        row = layout.row()
-        row.operator("bim.split_along_edge")
+        row = layout.row(align=True)
+        row.operator("bim.split_along_edge", text="Split Along Edge").mode = "BOOLEAN"
+        row.operator("bim.split_along_edge", text="Bisect At Faces").mode = "BISECT"
         row = layout.row()
         row.operator("bim.get_connected_system_elements")
         row = layout.row()

src/bonsai/bonsai/tool/misc.py

@@ -99,7 +99,7 @@ class Misc(bonsai.core.tool.Misc):
         bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
 
     @classmethod
-    def split_objects_with_cutter(
+    def boolean_objects_with_cutter(
         cls, objs: list[bpy.types.Object], cutter: bpy.types.Object
     ) -> list[bpy.types.Object]:
         cutter_mesh = cutter.data
@@ -144,3 +144,74 @@ class Misc(bonsai.core.tool.Misc):
         bm.free()
         bm_flipped.free()
         return new_objs
+
+    @classmethod
+    def bisect_objects_with_cutter(
+        cls, objs: list[bpy.types.Object], cutter: bpy.types.Object
+    ) -> list[bpy.types.Object]:
+        cutter_mesh = cutter.data
+        assert isinstance(cutter_mesh, bpy.types.Mesh)
+
+        bm = bmesh.new()
+        bm.from_mesh(cutter_mesh)
+        bm.faces.ensure_lookup_table()
+
+        planes = []
+        for face in bm.faces:
+            no = face.normal.to_4d()
+            no.w = 0.0
+            no = cutter.matrix_world @ no
+            co = cutter.matrix_world @ face.verts[0].co
+            planes.append((co, no))
+
+        bm.free()
+
+        new_objs = []
+        for obj in objs:
+            if not isinstance(obj.data, bpy.types.Mesh) or obj == cutter:
+                continue
+            matrix_i = obj.matrix_world.inverted()
+            bm_obj = bmesh.new()
+            bm_obj.from_mesh(obj.data)
+
+            bms = [bm_obj.copy()]
+            for co, no in planes:
+                co = matrix_i @ co
+                no = (matrix_i @ no).to_3d()
+                new_bms = []
+                for bm in bms:
+                    bm1 = bm.copy()
+                    bm2 = bm.copy()
+                    geom = bm1.verts[:] + bm1.edges[:] + bm1.faces[:]
+                    bisect1 = bmesh.ops.bisect_plane(
+                        bm1, geom=geom, dist=0.0001, plane_co=co, plane_no=no, clear_inner=True
+                    )
+                    if not bisect1["geom"] or not [g for g in bisect1["geom"] if isinstance(g, bmesh.types.BMFace)]:
+                        new_bms.append(bm)
+                        continue
+                    edges = [g for g in bisect1["geom_cut"] if isinstance(g, bmesh.types.BMEdge)]
+                    bmesh.ops.triangle_fill(bm1, use_dissolve=True, edges=edges)
+                    geom = bm2.verts[:] + bm2.edges[:] + bm2.faces[:]
+                    bisect2 = bmesh.ops.bisect_plane(
+                        bm2, geom=geom, dist=0.0001, plane_co=co, plane_no=no, clear_outer=True
+                    )
+                    if not bisect2["geom"] or not [g for g in bisect2["geom"] if isinstance(g, bmesh.types.BMFace)]:
+                        new_bms.append(bm)
+                        continue
+                    edges = [g for g in bisect2["geom_cut"] if isinstance(g, bmesh.types.BMEdge)]
+                    bmesh.ops.triangle_fill(bm2, use_dissolve=True, edges=edges)
+
+                    new_bms.append(bm1)
+                    new_bms.append(bm2)
+                bms = new_bms
+
+            for bm in bms:
+                mesh = obj.data
+                new_obj = obj.copy()
+                new_obj.data = mesh.copy()
+                bm.to_mesh(new_obj.data)
+                for collection in obj.users_collection:
+                    collection.objects.link(new_obj)
+                new_objs.append(new_obj)
+
+        return new_objs