added btlx ref edges to Beam

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Added `ref_frame` attribute to `Beam`.
 * Added `ref_sides` attribute to `Beam`.
+* Added `ref_edges` attribute to `Beam`.
 
 ### Changed
 

src/compas_timber/elements/beam.py

@@ -57,6 +57,8 @@ class Beam(Element):
         Reference frame for machining processes according to BTLx standard.
     ref_sides : tuple(:class:`~compas.geometry.Frame`)
         A tuple containing the 6 frames representing the sides of the beam according to BTLx standard.
+    ref_edges : tuple(:class:`~compas.geometry.Line`)
+        A tuple containing the 4 lines representing the long edges of the beam according to BTLx standard.
     faces : list(:class:`~compas.geometry.Frame`)
         A list of frames representing the 6 faces of this beam.
         0: +y (side's frame normal is equal to the beam's Y positive direction)
@@ -190,6 +192,17 @@ def ref_sides(self):
             Frame(rs6_point, self.ref_frame.zaxis, -self.ref_frame.yaxis, name="RS_6"),
         )
 
+    @property
+    def ref_edges(self):
+        # so tuple is not created every time
+        ref_sides = self.ref_sides
+        return (
+            Line(ref_sides[0].point, ref_sides[0].point + ref_sides[0].xaxis * self.blank_length, name="RE_1"),
+            Line(ref_sides[1].point, ref_sides[1].point + ref_sides[1].xaxis * self.blank_length, name="RE_2"),
+            Line(ref_sides[2].point, ref_sides[2].point + ref_sides[2].xaxis * self.blank_length, name="RE_3"),
+            Line(ref_sides[3].point, ref_sides[3].point + ref_sides[3].xaxis * self.blank_length, name="RE_4"),
+        )
+
     @property
     def centerline(self):
         return Line(self.centerline_start, self.centerline_end)

tests/compas_timber/test_btlx.py

@@ -65,3 +65,31 @@ def test_beam_ref_faces_attribute(mock_beam):
         ref_side = mock_beam.ref_sides[index]
         assert ref_side_frames_expected[index] == ref_side
         assert ref_side.name == "RS_{}".format(index + 1)
+
+
+def test_beam_ref_edges(mock_beam):
+
+    ref_edges_expected = (
+        Line(
+            Point(x=-48.67193560518159, y=20.35704602012424, z=0.0005429194857271558),
+            Point(x=-38.61153715338159, y=24.06100004952424, z=0.5005429194857273),
+        ),
+        Line(
+            Point(x=-48.7156552451492, y=20.340949685829152, z=0.9994570805142728),
+            Point(x=-38.6552567933492, y=24.04490371522915, z=1.499457080514273),
+        ),
+        Line(
+            Point(x=-48.37015592401841, y=19.402530686075757, z=0.9994570805142728),
+            Point(x=-38.309757472218415, y=23.106484715475755, z=1.499457080514273),
+        ),
+        Line(
+            Point(x=-48.3264362840508, y=19.41862702037084, z=0.000542919485727154),
+            Point(x=-38.2660378322508, y=23.12258104977084, z=0.5005429194857273),
+        ),
+    )
+    assert len(mock_beam.ref_edges) == 4
+
+    for index in range(4):
+        ref_edge = mock_beam.ref_edges[index]
+        assert ref_edges_expected[index] == ref_edge
+        assert ref_edge.name == "RE_{}".format(index + 1)