Purge usage of mathutils in grid API functions

The only thing left is add_representation which is Blender specific
anyway and is slowly being refactored out.

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

@@ -474,7 +474,7 @@ class UpdateRepresentation(bpy.types.Operator, tool.Ifc.Operator):
 
         if product.is_a("IfcGridAxis"):
             # Grid geometry does not follow the "representation" paradigm and needs to be treated specially
-            ifcopenshell.api.grid.create_axis_curve(self.file, axis_curve=obj, grid_axis=product)
+            tool.Model.create_axis_curve(obj, product)
             return
         elif product.is_a("IfcRelSpaceBoundary"):
             # TODO refactor

src/bonsai/bonsai/bim/module/model/grid.py

@@ -50,7 +50,7 @@ def add_object(self, context):
             "grid.create_grid_axis", tool.Ifc.get(), axis_tag=tag, uvw_axes="UAxes", grid=grid
         )
         tool.Ifc.link(result, obj)
-        ifcopenshell.api.run("grid.create_axis_curve", tool.Ifc.get(), axis_curve=obj, grid_axis=result)
+        tool.Model.create_axis_curve(obj, result)
         tool.Collector.assign(obj)
 
     for i in range(0, self.total_v):
@@ -69,7 +69,7 @@ def add_object(self, context):
             "grid.create_grid_axis", tool.Ifc.get(), axis_tag=tag, uvw_axes="VAxes", grid=grid
         )
         tool.Ifc.link(result, obj)
-        ifcopenshell.api.run("grid.create_axis_curve", tool.Ifc.get(), axis_curve=obj, grid_axis=result)
+        tool.Model.create_axis_curve(obj, result)
         tool.Collector.assign(obj)
 
     tool.Root.reload_grid_decorator()

src/bonsai/bonsai/tool/model.py

@@ -1978,3 +1978,11 @@ class Model(bonsai.core.tool.Model):
         x_angle = Vector((0, 1)).angle_signed(Vector((y, z)))
 
         return x_angle
+
+    @classmethod
+    def create_axis_curve(cls, obj: bpy.types.Object, grid_axis: ifcopenshell.entity_instance):
+        m = tool.Surveyor.get_absolute_matrix(obj)
+        points = [m @ np.array(v.co.to_4d()) for v in obj.data.vertices[0:2]]
+        ifcopenshell.api.grid.create_axis_curve(
+            tool.Ifc.get(), p1=points[0], p2=points[1], is_si=True, grid_axis=grid_axis
+        )