cq_toplevel: implement --render-phone-only CLI option to render just the phone without any case

cq_toplevel.py

@@ -46,7 +46,13 @@ def svg_export_options(view: str):
 
 def model():
     render_phone = os.environ.get("CASE_RENDER_PHONE", "") not in ("", "0")
+    render_phone_only = os.environ.get("CASE_RENDER_PHONE_ONLY", "") not in ("", "0")
+
     phone = pinephone.PinePhone()
+
+    if render_phone_only:
+        return case.orient_for_printing(phone)
+
     battery = ldtek_battery.LdtekBattery()
     return case.case(phone, battery=battery, render_phone=render_phone)
 
@@ -55,7 +61,8 @@ def main():
     logging.getLogger().setLevel(logging.INFO)
 
     parser = argparse.ArgumentParser(description="toplevel cadquery interface")
-    parser.add_argument("--render-phone", action="store_true", help="include the phone model itself in the stl; useful to confirm fit visually before printing")
+    parser.add_argument("--render-phone", action="store_true", help="render the case and also the phone within it; useful to confirm fit visually before printing")
+    parser.add_argument("--render-phone-only", action="store_true", help="render *only* the phone, not even the case")
     parser.add_argument("--export-stl")
     parser.add_argument("--export-svg")
     parser.add_argument("--export-vtk")
@@ -66,6 +73,9 @@ def main():
     if args.render_phone:
         os.environ["CASE_RENDER_PHONE"] = "1"
 
+    if args.render_phone_only:
+        os.environ["CASE_RENDER_PHONE_ONLY"] = "1"
+
     logger.info("computing model ...")
     model_ = model()