plugins: gap review fixes -- Blender's float32 gap at 0.4 is in range, Onshape's gap bounds are the site's 0.1-0.4, Cura README

plugins/blender/support_fins/schema.py

@@ -72,7 +72,10 @@ def dialog_values(schema, read):
     for s in specs(schema):
         v = read(s["name"])
         if s["kind"] == "float":
-            v = float(v) / 100.0 if s["percent"] else float(v)
+            # Blender keeps a FloatProperty as float32: the gap's 0.4 max reads back as
+            # 0.4000000059604645, which the engine refuses as out of range. Six places
+            # drops that noise and nothing a dialog can set.
+            v = round(float(v) / 100.0 if s["percent"] else float(v), 6)
         elif s["kind"] == "bool":
             v = bool(v)
         values[s["key"]] = v

plugins/blender/tests/test_schema.py

@@ -14,6 +14,7 @@ Pinned:
 """
 import json
 import pathlib
+import struct
 import sys
 import zipfile
 import xml.etree.ElementTree as ET
@@ -90,10 +91,14 @@ def test_the_engine_takes_what_the_panel_sends(engine):
     by_name = {s["name"]: s for s in SPECS}
     defaults = host.host_options(ctx, schema.dialog_values(SCHEMA, lambda n: by_name[n]["default"]))
     assert defaults["gap"] == 0.2 and "sway" not in defaults      # sway off: not sent
-    tops = {s["name"]: s.get("max", s.get("soft_max")) if s["kind"] == "float" else s["default"] for s in SPECS}
+    # as Blender hands them back: a FloatProperty is float32, so the gap's 0.4 max
+    # reads as 0.4000000059604645 -- and must still be in range
+    f32 = lambda x: struct.unpack("f", struct.pack("f", x))[0]
+    tops = {s["name"]: f32(s.get("max", s.get("soft_max"))) if s["kind"] == "float" else s["default"] for s in SPECS}
     tops["sway_on"] = True
     opts = host.host_options(ctx, schema.dialog_values(SCHEMA, lambda n: tops[n]))
     assert opts["coverage"] == 1.0 and opts["sway"]["reach"] == 0.5     # 100 % and 50 % arrive / 100
+    assert opts["gap"] == 0.4
 
 
 def test_a_key_clash_is_refused():

plugins/cura/README.md

@@ -83,8 +83,8 @@ python3 plugins/cura/build.py && python3 -m pytest -q plugins/cura/tests/
 ```
 
 The tests cover the frame mapping (Cura is Y-up, the engine Z-up), the part → engine → fins
-round trip, and the settings layer (`SupportFins/settings.py`: saved values, Match Cura, the
-dialog's rows, stale fins), without Cura. For the Cura side (menu, background job, scene, undo), drop a
+round trip, and the settings layer (`SupportFins/settings.py`: saved values, the dialog's rows,
+stale fins), without Cura. For the Cura side (menu, background job, scene, undo), drop a
 `dev_autorun.json` next to the built plugin and open a model:
 
 ```sh

plugins/onshape/supportFins.fs

@@ -101,9 +101,10 @@ const NOZZLE_BOUNDS =
     (inch)       : 0.016
 } as LengthBoundSpec;
 
+// the site's Support gap field: 0.1-0.4 mm, default 0.2
 const GAP_BOUNDS =
 {
-    (millimeter) : [0.05, 0.2, 2.0],
+    (millimeter) : [0.1, 0.2, 0.4],
     (inch)       : 0.008
 } as LengthBoundSpec;