feat(objects): mesh transform helper

specklepy/objects/geometry.py

@@ -391,6 +391,15 @@ class Mesh(
     area: float = None
     volume: float = None
 
+    def transform_to(self, transform: "Transform") -> "Mesh":
+        mesh = Mesh(vertices=transform.apply_to_points_values(self.vertices))
+        for attr in set(self.get_serializable_attributes()) - {"vertices"}:
+            orig_val = getattr(self, attr, None)
+            if orig_val:
+                setattr(mesh, attr, orig_val)
+
+        return mesh
+
 
 class Surface(Base, speckle_type=GEOMETRY + "Surface"):
     degreeU: int = None

tests/test_transforms.py

@@ -1,7 +1,7 @@
 from typing import List
 import pytest
 from specklepy.api import operations
-from specklepy.objects.geometry import Point, Vector
+from specklepy.objects.geometry import Mesh, Point, Vector
 from specklepy.objects.other import (
     Transform,
     BlockInstance,
@@ -43,6 +43,15 @@ def vector_value():
     return [1, 1, 2]
 
 
+@pytest.fixture()
+def mesh():
+    return Mesh(
+        vertices=[-7, 5, 1, -8, 4, 0, -7, 3, 0, -6, 4, 0],
+        faces=[1, 1, 2, 3, 0],
+        units="feet",
+    )
+
+
 @pytest.fixture()
 def transform():
     """Translates to [1, 2, 0] and scales z by 0.5"""
@@ -130,3 +139,13 @@ def test_transform_serialisation(transform: Transform):
     deserialized = operations.deserialize(serialized)
 
     assert transform.get_id() == deserialized.get_id()
+
+
+def test_mesh_transform(mesh: Mesh, transform: Transform):
+    new_mesh = mesh.transform_to(transform)
+
+    assert mesh.vertices != new_mesh.vertices
+
+    new_mesh.vertices = mesh.vertices
+
+    assert mesh.get_id() == new_mesh.get_id()