Marcin: Created page with "#!/usr/bin/env python3 import sys from pathlib import Path import yaml import FreeCAD CAD_DIR = Path("cad_library") def ft_to_in(ft): return ft * 12.0 def nominal_to_actual_lumber(nominal): table = { "2x2": (1.5, 1.5), "2x3": (1.5, 2.5), "2x4": (1.5, 3.5), "2x6": (1.5, 5.5), "2x8": (1.5, 7.25), "2x10": (1.5, 9.25), "2x12": (1.5, 11.25), } return table[nominal] def load_yaml(path): with op..."

2026-03-11T02:28:10Z

Created page with "#!/usr/bin/env python3 import sys from pathlib import Path import yaml import FreeCAD CAD_DIR = Path("cad_library") def ft_to_in(ft): return ft * 12.0 def nominal_to_actual_lumber(nominal): table = { "2x2": (1.5, 1.5), "2x3": (1.5, 2.5), "2x4": (1.5, 3.5), "2x6": (1.5, 5.5), "2x8": (1.5, 7.25), "2x10": (1.5, 9.25), "2x12": (1.5, 11.25), } return table[nominal] def load_yaml(path): with op..."

New page

#!/usr/bin/env python3

import sys
from pathlib import Path
import yaml
import FreeCAD

CAD_DIR = Path("cad_library")

def ft_to_in(ft):
return ft * 12.0

def nominal_to_actual_lumber(nominal):
table = {
"2x2": (1.5, 1.5),
"2x3": (1.5, 2.5),
"2x4": (1.5, 3.5),
"2x6": (1.5, 5.5),
"2x8": (1.5, 7.25),
"2x10": (1.5, 9.25),
"2x12": (1.5, 11.25),
}
return table[nominal]

def load_yaml(path):
with open(path, "r") as f:
return yaml.safe_load(f)

def count_objects(doc, prefix):
count = 0
for obj in doc.Objects:
if obj.Name.startswith(prefix):
count += 1
return count

def validate_instance(instance):

instance_id = instance["id"]
params = instance["parameters"]

width_ft = params["nominal_width_ft"]
height_ft = params["nominal_height_ft"]
stud_nominal = params["stud_lumber_nominal"]
osb_thickness = params["osb_thickness_in"]

width_in_expected = ft_to_in(width_ft)
height_in_expected = ft_to_in(height_ft)

stud_thickness, stud_depth = nominal_to_actual_lumber(stud_nominal)

file_path = CAD_DIR / f"{instance_id}.FCStd"

if not file_path.exists():
return [f"{instance_id}: CAD file not found"]

doc = FreeCAD.openDocument(str(file_path))

errors = []

bbox = None

for obj in doc.Objects:
if hasattr(obj, "Shape"):
bb = obj.Shape.BoundBox
if bbox is None:
bbox = bb
else:
bbox.add(bb)

if bbox is None:
errors.append(f"{instance_id}: no geometry found")
return errors

width_actual = bbox.XLength
height_actual = bbox.ZLength
thickness_actual = bbox.YLength

if abs(width_actual - width_in_expected) > 0.25:
errors.append(
f"{instance_id}: width mismatch expected {width_in_expected} got {width_actual}"
)

if abs(height_actual - height_in_expected) > 0.25:
errors.append(
f"{instance_id}: height mismatch expected {height_in_expected} got {height_actual}"
)

expected_thickness = stud_depth + osb_thickness

if abs(thickness_actual - expected_thickness) > 0.25:
errors.append(
f"{instance_id}: thickness mismatch expected {expected_thickness} got {thickness_actual}"
)

stud_count = count_objects(doc, "stud_")

if stud_count < 2:
errors.append(f"{instance_id}: invalid stud count {stud_count}")

osb_count = count_objects(doc, "osb")

if osb_count != 1:
errors.append(f"{instance_id}: expected 1 OSB panel, found {osb_count}")

FreeCAD.closeDocument(doc.Name)

return errors

def main():

if len(sys.argv) != 2:
print("Usage: validate_wall_geometry.py instances.yaml")
sys.exit(1)

instances_doc = load_yaml(sys.argv[1])

instances = instances_doc["instances"]

all_errors = []

for inst in instances:
errs = validate_instance(inst)
all_errors.extend(errs)

if all_errors:
print("Geometry validation FAILED:")
for e in all_errors:
print(" ", e)
sys.exit(1)

print(f"Geometry validation passed for {len(instances)} modules")

if __name__ == "__main__":
main()

Validate wall geometry.py - Revision history