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perf(ship): merge non-tinted hull meshes into one node

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Hull/Canopy/EngineGlowL/EngineGlowR are runtime-baked into one ArrayMesh
in _ready via SurfaceTool.append_from, dropping 4 MeshInstance3D children
to 1 (Nose/TailFin stay separate, they're retinted per-team). Skipped in
headless mode like the goal/arena_boundary visual builds, since physics
only cares about CollisionShape3D.

All 6 source surfaces (hull, canopy, engine_l x2, engine_r x2) carry
distinct materials, so this doesn't literally cut draw calls 6 to 3 as
TODO.md assumed — Godot still issues one draw call per surface regardless
of node count. The real win is scene-tree/transform overhead, not batching.
This commit is contained in:
Josh Creek
2026-08-04 18:16:02 +01:00
parent 7b086fbd8f
commit 96ff503fa8
3 changed files with 57 additions and 24 deletions
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Game/objects/ship.tscn
-20
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@@ -1,12 +1,8 @@
[gd_scene load_steps=13 format=3 uid="uid://p07epxnh8wwp"]
[ext_resource type="Script" uid="uid://dyq1n7q1bqjps" path="res://scripts/ship.gd" id="1_efag7"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_hull.res" id="2_hull"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_nose.res" id="3_nose"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_canopy.res" id="4_canopy"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_tailfin.res" id="5_talfin"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_engine_l.res" id="6_enginel"]
[ext_resource type="ArrayMesh" path="res://assets/models/ship_engine_r.res" id="7_enginer"]
[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_ship"]
friction = 0.1
@@ -21,29 +17,13 @@ physics_material_override = SubResource("PhysicsMaterial_ship")
inertia = Vector3(1, 1, 1)
script = ExtResource("1_efag7")
[node name="Hull" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, 0)
mesh = ExtResource("2_hull")
[node name="Nose" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, 0)
mesh = ExtResource("3_nose")
[node name="Canopy" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0.31, -0.55)
mesh = ExtResource("4_canopy")
[node name="TailFin" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0.24, 0.72)
mesh = ExtResource("5_talfin")
[node name="EngineGlowL" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, -0.42, -0.05, 0.95)
mesh = ExtResource("6_enginel")
[node name="EngineGlowR" type="MeshInstance3D" parent="."]
transform = Transform3D(-1, 0, 0, 0, 1, 0, 0, 0, -1, 0.42, -0.05, 0.95)
mesh = ExtResource("7_enginer")
[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
shape = SubResource("BoxShape3D_dsjou")