Add Plane.reverse() Issue #546

gumyr · Feb 10, 2024 · 594e5f8 · 594e5f8
1 parent 4641d1d
commit 594e5f8
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diff --git a/src/build123d/geometry.py b/src/build123d/geometry.py
@@ -26,6 +26,7 @@
  limitations under the License.
 
 """
+
 from __future__ import annotations
 
 # pylint has trouble with the OCP imports
@@ -1953,6 +1954,10 @@ def __repr__(self):
  z_dir_str = ", ".join((f"{v:.2f}" for v in self.z_dir.to_tuple()))
  return f"Plane(o=({origin_str}), x=({x_dir_str}), z=({z_dir_str}))"
 
+ def reverse(self) -> Plane:
+ """Reverse z direction of plane"""
+ return -self
+
  @property
  def origin(self) -> Vector:
  """Get the Plane origin"""

diff --git a/tests/test_direct_api.py b/tests/test_direct_api.py
@@ -2248,6 +2248,13 @@ def test_plane_neg(self):
  self.assertVectorAlmostEquals(
  p2.y_dir, (-p.z_dir).cross(p.x_dir).normalized(), 6
  )
+ p3 = p.reverse()
+ self.assertVectorAlmostEquals(p3.origin, p.origin, 6)
+ self.assertVectorAlmostEquals(p3.x_dir, p.x_dir, 6)
+ self.assertVectorAlmostEquals(p3.z_dir, -p.z_dir, 6)
+ self.assertVectorAlmostEquals(
+ p3.y_dir, (-p.z_dir).cross(p.x_dir).normalized(), 6
+ )
 
  def test_plane_mul(self):
  p = Plane(origin=(1, 2, 3), x_dir=(1, 0, 0), z_dir=(0, 0, 1))