Wrong quantities on BoM #162
Description
I'm finding this difficulty when using the BoM feature. To make the assembly easier and avoid writing the same code several times I was defining some sub-assemblies within a variable and then adding several of those sub-assemblies onto a base part. Proceeding this way generated the right SCAD code but the wrong BoM. Would it be possible (though I don't see how to be honest with you, so this is maybe more of a rant than an issue itself) to implement a fix for this? The following example illustrates (I hope) the problem. If I were to modify the example file like this:
diff --git a/solid/examples/bom_scad.py b/solid/examples/bom_scad.py
index a059a66..84047fb 100755
--- a/solid/examples/bom_scad.py
+++ b/solid/examples/bom_scad.py
@@ -93,15 +93,17 @@ def doohickey(c):
def assembly():
+ short_screw = m3_12()
+ nut = m3_nut()
return union()(
doohickey(c='blue'),
- translate((-10, 0, doohickey_h / 2))(m3_12()),
+ translate((-10, 0, doohickey_h / 2))(short_screw),
translate((0, 0, doohickey_h / 2))(m3_16()),
- translate((10, 0, doohickey_h / 2))(m3_12()),
+ translate((10, 0, doohickey_h / 2))(short_screw),
# Nuts
- translate((-10, 0, -nut_height - doohickey_h / 2))(m3_nut()),
- translate((0, 0, -nut_height - doohickey_h / 2))(m3_nut()),
- translate((10, 0, -nut_height - doohickey_h / 2))(m3_nut()),
+ translate((-10, 0, -nut_height - doohickey_h / 2))(nut),
+ translate((0, 0, -nut_height - doohickey_h / 2))(nut),
+ translate((10, 0, -nut_height - doohickey_h / 2))(nut),
)
The example now produces, as expected I guess, the right SCAD assembly with all the parts on it but the wrong quantities on the BoM:
[...]
Or, Spreadsheet-ready TSV:
Description Count Unit Price Total Price link leftover
M3x16 Bolt 1 € 0.12 € 0.12 http://example.io/M3x160
M3x12 Bolt 1 US$ 0.09 US$ 0.09 0
M3 Nut 1 R$ 0.04 R$ 0.04
doohickey 1
Total Cost, € € 0.12
Total Cost, US$ US$ 0.09
Total Cost, R$ R$ 0.04