hull_source: delete the nose-ward muzzle rule; gun facing is HullData's

The Blender scene cannot know which way a hardpoint points: HullData's
hardpoint rotation owns that (ruling aetheria-release:ruling:gun-facing-is-hulldata).
Deletes the forward list and its term in the muzzle check, the two facing
tests, and the smoke's nose-ward require. Pairing stays whole.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/blender/aetheria_ships/hull_source.py

@@ -344,13 +344,11 @@ def _checks(hull, own, judge):
     by_id = {a.id: a for a in hull.anchors}
     unmuzzled = [a.id for a in hull.anchors if a.role == "weapon-mount"
                  and not any(m.role == "weapon-muzzle" and m.parent == a.id for m in hull.anchors)]
-    forward = [m.id for m in hull.anchors if m.role == "weapon-muzzle" and m.parent in by_id
-               and by_id[m.parent].role == "weapon-mount" and m.position[1] >= by_id[m.parent].position[1]]
     orphans = [m.id for m in hull.anchors if m.role == "weapon-muzzle"
                and (m.parent not in by_id or by_id[m.parent].role != "weapon-mount")]
-    checks.append(Check("every weapon-mount has a muzzle nose-ward of it and no muzzle is orphaned",
-                        not (unmuzzled or forward or orphans),
-                        f"{len(unmuzzled)} without a muzzle, {len(forward)} not nose-ward, {len(orphans)} orphaned"))
+    checks.append(Check("every weapon-mount has a muzzle and no muzzle is orphaned",
+                        not (unmuzzled or orphans),
+                        f"{len(unmuzzled)} without a muzzle, {len(orphans)} orphaned"))
     return checks
 
 

tools/blender/tests/smoke_hull_source.py

@@ -215,7 +215,6 @@ def one_hull(scene, number, fixture, ship_id, extent, length, rows, body, palett
     for muzzle in roles["weapon-muzzle"]:
         mount = first[muzzle].parent
         require(mount.get("aetheria.role") == "weapon-mount" and first[muzzle].get("aetheria.order") == 1, "A muzzle is not ordered under its mount")
-        require(first[muzzle].matrix_world.translation.y < mount.matrix_world.translation.y, "A muzzle is not nose-ward of its mount")
     require(layout_rows(scene) == rows_before, "Build changed the layout buffer")
     check_poses(collection, root, runner)
     if fixture == "zh-ammo-tender":

tools/blender/tests/test_hull_source.py

@@ -57,7 +57,7 @@ class Fixture:
     def __init__(self):
         self.library = {"zhestokost": language()}
         self.hull_lang = None
-        # Body 6 wide, 10 long, 2 high (h/w 0.33, w/l 0.6); a bilateral plate on top; one gun with a muzzle nose-ward.
+        # Body 6 wide, 10 long, 2 high (h/w 0.33, w/l 0.6); a bilateral plate on top; one gun with a muzzle.
         self.parts = {
             "brief": ("", brief()),
             "primary": (box(-3, 3, -5, 5, 0, 2), ""),
@@ -221,20 +221,7 @@ class JudgementTests(unittest.TestCase):
             fixture.parts["brief"] = ("", brief(length=length))
             self.assertEqual(fixture.failed(), ["the length lies inside the brief's range"], length)
 
-    MUZZLE = "every weapon-mount has a muzzle nose-ward of it and no muzzle is orphaned"
-
-    def test_a_muzzle_aft_of_its_mount_is_refused(self):
-        fixture = Fixture()
-        fixture.parts["anchors"] = ("", echo("anchor", ["Gun.A", "weapon-mount", [0, 0, 3], 0, ""])
-                                    + echo("anchor", ["Gun.A.muzzle", "weapon-muzzle", [0, 1, 3], 0, "Gun.A"])
-                                    + echo("anchor", ["Th.A", "thruster-emitter", [1, 5, 1], 180, ""]))
-        self.assertEqual(fixture.failed(), [self.MUZZLE])
-
-    def test_a_muzzle_level_with_its_mount_is_not_nose_ward(self):
-        fixture = Fixture()
-        fixture.parts["anchors"] = ("", echo("anchor", ["Gun.A", "weapon-mount", [0, 0, 3], 0, ""])
-                                    + echo("anchor", ["Gun.A.muzzle", "weapon-muzzle", [1, 0, 3], 0, "Gun.A"]))
-        self.assertEqual(fixture.failed(), [self.MUZZLE])
+    MUZZLE = "every weapon-mount has a muzzle and no muzzle is orphaned"
 
     def test_a_mount_without_a_muzzle_and_a_muzzle_without_a_mount_are_refused(self):
         fixture = Fixture()