New feature to quickly add an Ifc Grid system object

src/ifcblenderexport/blenderbim/bim/module/model/grid.py

@@ -0,0 +1,74 @@
+import bpy
+import math
+from bpy.types import Operator
+from bpy.props import FloatVectorProperty, FloatProperty, IntProperty
+from bpy_extras.object_utils import AddObjectHelper, object_data_add
+from mathutils import Vector
+
+def add_object(self, context):
+    obj = object_data_add(context, None, operator=self)
+    obj.name = 'IfcGrid/Grid'
+    name = obj.name.split('/')[1]
+
+    default_collection = obj.users_collection[0]
+    default_collection.objects.unlink(obj)
+
+    collection = bpy.data.collections.new('IfcGrid/' + name)
+    bpy.context.view_layer.active_layer_collection.collection.children.link(collection)
+    collection.objects.link(obj)
+
+    axes_collection = bpy.data.collections.new('UAxes')
+    collection.children.link(axes_collection)
+    for i in range(0, self.total_u):
+        verts = [Vector((-2, i*self.u_spacing, 0)), Vector((((self.total_v-1)*self.v_spacing)+2, i*self.u_spacing, 0))]
+        edges = [[0, 1]]
+        faces = []
+        mesh = bpy.data.meshes.new(name="Grid Axis")
+        mesh.from_pydata(verts, edges, faces)
+        obj = object_data_add(context, mesh, operator=self)
+        tag = chr(ord('A')+i)
+        obj.name = 'IfcGridAxis/' + tag
+        default_collection.objects.unlink(obj)
+        axes_collection.objects.link(obj)
+        attribute = obj.BIMObjectProperties.attributes.add()
+        attribute.name = 'AxisTag'
+        attribute.string_value = tag
+
+    axes_collection = bpy.data.collections.new('VAxes')
+    collection.children.link(axes_collection)
+    for i in range(0, self.total_v):
+        verts = [Vector((i*self.v_spacing, -2, 0)), Vector((i*self.v_spacing, ((self.total_u-1)*self.u_spacing)+2, 0))]
+        edges = [[0, 1]]
+        faces = []
+        mesh = bpy.data.meshes.new(name="Grid Axis")
+        mesh.from_pydata(verts, edges, faces)
+        obj = object_data_add(context, mesh, operator=self)
+        tag = str(i+1).zfill(2)
+        obj.name = 'IfcGridAxis/' + tag
+        default_collection.objects.unlink(obj)
+        axes_collection.objects.link(obj)
+        attribute = obj.BIMObjectProperties.attributes.add()
+        attribute.name = 'AxisTag'
+        attribute.string_value = tag
+
+
+
+class BIM_OT_add_object(Operator, AddObjectHelper):
+    bl_idname = "mesh.add_grid"
+    bl_label = "Grid"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    u_spacing: FloatProperty(name='U Spacing', default=10)
+    total_u: IntProperty(name='Number of U Grids', default=3)
+    v_spacing: FloatProperty(name='V Spacing', default=10)
+    total_v: IntProperty(name='Number of V Grids', default=3)
+
+    def execute(self, context):
+        add_object(self, context)
+        return {'FINISHED'}
+
+
+def add_object_button(self, context):
+    self.layout.operator(
+        BIM_OT_add_object.bl_idname,
+        icon='PLUGIN')