Initial test

Rapier wins! At least with boxes...

.gitignore

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+bin/
+target/
+lib/
+logs/

addons/3d_batcher/batched_mesh_instance.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/3d_batcher/gd_3d_batcher.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+class_name = "BatchedMeshInstance"
+library = ExtResource( 1 )
+script_class_name = "BatchedMeshInstance"

addons/3d_batcher/batched_mesh_manager.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/3d_batcher/gd_3d_batcher.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+resource_name = "BatchedMeshManager"
+class_name = "BatchedMeshManager"
+library = ExtResource( 1 )
+script_class_name = "BatchedMeshManager"

addons/3d_batcher/gd_3d_batcher.gdnlib

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+[resource]
+
+entry/X11.64="res://addons/3d_batcher/lib/libgd_3d_batcher.so"
+dependency/X11.64=[  ]
+
+[general]
+
+singleton=false
+load_once=true
+symbol_prefix="godot_"
+reloadable=true
+
+[entry]
+
+OSX.64="res://addons/3d_batcher/lib/libgd_3d_batcher.dylib"
+Windows.64="res://addons/3d_batcher/lib/gd_3d_batcher.dll"
+X11.64="res://addons/3d_batcher/lib/libgd_3d_batcher.so"
+
+[dependencies]
+
+OSX.64=[  ]
+Windows.64=[  ]
+X11.64=[  ]

addons/3d_batcher/plugin.cfg

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+[plugin]
+
+name="3D Batcher"
+description="Automatically batch nodes with the same mesh and material."
+author="David Hoppenbrouwers"
+version="0.1"
+script="plugin.gd"

addons/3d_batcher/plugin.gd

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+tool
+extends EditorPlugin
+
+
+const AUTOLOAD_SCRIPT := "batched_mesh_manager.gdns"
+
+var autoload = null
+
+
+func _enter_tree() -> void:
+	autoload = preload(AUTOLOAD_SCRIPT).new()
+	add_child(autoload)
+
+
+func _exit_tree() -> void:
+	autoload.queue_free()
+	autoload = null

addons/rapier3d/box.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/rapier3d/rapier3d.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+class_name = "Box"
+library = ExtResource( 1 )
+script_class_name = "Rapier3D_Box"

addons/rapier3d/rapier3d.gdnlib

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+[general]
+
+singleton=false
+load_once=true
+symbol_prefix="gd_rapier3d_"
+reloadable=true
+
+[entry]
+
+X11.64="res://addons/rapier3d/lib/libgodot_rapier3d.so"
+
+[dependencies]
+
+X11.64=[  ]

addons/rapier3d/rapier3d.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/rapier3d/rapier3d.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+class_name = "Rapier3D"
+library = ExtResource( 1 )
+script_class_name = "Rapier3D"

addons/rapier3d/rigid_body.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/rapier3d/rapier3d.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+class_name = "RigidBody"
+library = ExtResource( 1 )
+script_class_name = "Rapier3D_RigidBody"

addons/rapier3d/rustfmt.toml

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+hard_tabs = true

addons/rapier3d/static_body.gdns

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+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://addons/rapier3d/rapier3d.gdnlib" type="GDNativeLibrary" id=1]
+
+[resource]
+resource_name = "StaticBody"
+class_name = "StaticBody"
+library = ExtResource( 1 )
+script_class_name = "Rapier3D_StaticBody"

box_godot.tscn

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+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://addons/3d_batcher/batched_mesh_instance.gdns" type="Script" id=3]
+
+[sub_resource type="BoxShape" id=1]
+extents = Vector3( 0.5, 0.5, 0.5 )
+
+[sub_resource type="SpatialMaterial" id=2]
+vertex_color_use_as_albedo = true
+
+[sub_resource type="CubeMesh" id=3]
+material = SubResource( 2 )
+size = Vector3( 1, 1, 1 )
+
+[node name="Box" type="RigidBody"]
+input_ray_pickable = false
+
+[node name="Shape" type="CollisionShape" parent="."]
+shape = SubResource( 1 )
+
+[node name="Mesh" type="Spatial" parent="."]
+script = ExtResource( 3 )
+mesh = SubResource( 3 )
+use_color = true
+color = Color( 1, 1, 1, 1 )

box_rapier3d.tscn

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+[gd_scene load_steps=6 format=2]
+
+[ext_resource path="res://addons/rapier3d/box.gdns" type="Script" id=1]
+[ext_resource path="res://addons/rapier3d/rigid_body.gdns" type="Script" id=2]
+[ext_resource path="res://addons/3d_batcher/batched_mesh_instance.gdns" type="Script" id=3]
+
+[sub_resource type="SpatialMaterial" id=2]
+vertex_color_use_as_albedo = true
+
+[sub_resource type="CubeMesh" id=1]
+material = SubResource( 2 )
+size = Vector3( 1, 1, 1 )
+
+[node name="Box" type="Spatial"]
+script = ExtResource( 2 )
+__meta__ = {
+"_edit_group_": true
+}
+
+[node name="Shape" type="Spatial" parent="."]
+script = ExtResource( 1 )
+extents = Vector3( 0.5, 0.5, 0.5 )
+
+[node name="Mesh" type="Spatial" parent="."]
+script = ExtResource( 3 )
+mesh = SubResource( 1 )
+use_color = true
+color = Color( 1, 1, 1, 1 )

boxes.gd

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+extends Node
+
+
+export var x := 10
+export var y := 10
+export var z := 10
+export var origin := Vector3.ONE
+export var offset := Vector3.ONE
+export var box_rapier3d: PackedScene
+export var box_godot: PackedScene
+export var use_rapier3d := true
+export var colors := PoolColorArray([Color.white, Color.red, Color.green, Color.blue, Color.yellow, Color.magenta])
+
+
+func _ready():
+	var i := 0
+	for a in x:
+		for b in y:
+			for c in z:
+				var n: Spatial = (box_rapier3d if use_rapier3d else box_godot).instance()
+				n.get_node("Mesh").color = colors[i % len(colors)]
+				i += 1
+				n.translation = Vector3(a, b, c) * offset + origin
+				add_child(n)

boxes.tscn

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+[gd_scene load_steps=10 format=2]
+
+[ext_resource path="res://addons/rapier3d/rapier3d.gdns" type="Script" id=1]
+[ext_resource path="res://addons/rapier3d/static_body.gdns" type="Script" id=2]
+[ext_resource path="res://addons/rapier3d/box.gdns" type="Script" id=3]
+[ext_resource path="res://box_rapier3d.tscn" type="PackedScene" id=4]
+[ext_resource path="res://boxes.gd" type="Script" id=5]
+[ext_resource path="res://box_godot.tscn" type="PackedScene" id=6]
+[ext_resource path="res://stats.gd" type="Script" id=7]
+
+[sub_resource type="CubeMesh" id=1]
+size = Vector3( 100, 1, 100 )
+
+[sub_resource type="BoxShape" id=2]
+extents = Vector3( 50, 0.5, 50 )
+
+[node name="Node" type="Node"]
+script = ExtResource( 5 )
+x = 16
+y = 16
+z = 16
+box_rapier3d = ExtResource( 4 )
+box_godot = ExtResource( 6 )
+
+[node name="Floor Rapier3D" type="Spatial" parent="."]
+script = ExtResource( 2 )
+__meta__ = {
+"_edit_group_": true
+}
+
+[node name="Shape" type="Spatial" parent="Floor Rapier3D"]
+script = ExtResource( 3 )
+extents = Vector3( 50, 0.5, 50 )
+
+[node name="MeshInstance" type="MeshInstance" parent="Floor Rapier3D"]
+mesh = SubResource( 1 )
+material/0 = null
+
+[node name="Floor Godot" type="StaticBody" parent="."]
+
+[node name="Shape" type="CollisionShape" parent="Floor Godot"]
+shape = SubResource( 2 )
+
+[node name="Rapier" type="Node" parent="."]
+script = ExtResource( 1 )
+
+[node name="Camera" type="Camera" parent="."]
+transform = Transform( 0, -0.5, 0.866025, 0, 0.866025, 0.5, -1, 0, 0, 41, 25, 3 )
+
+[node name="DirectionalLight" type="DirectionalLight" parent="."]
+transform = Transform( -0.965926, -0.12941, 0.224144, 0, 0.866025, 0.5, -0.258819, 0.482963, -0.836516, 0, 7, -13 )
+shadow_enabled = true
+
+[node name="Stats" type="Panel" parent="."]
+margin_right = 186.0
+margin_bottom = 94.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="Stats" type="Label" parent="Stats"]
+process_priority = 10
+margin_right = 120.0
+margin_bottom = 35.0
+script = ExtResource( 7 )
+__meta__ = {
+"_edit_use_anchors_": false
+}

default_env.tres

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+[gd_resource type="Environment" load_steps=2 format=2]
+
+[sub_resource type="ProceduralSky" id=1]
+
+[resource]
+background_mode = 2
+background_sky = SubResource( 1 )
+ambient_light_energy = 0.3

export_presets.cfg

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+[preset.0]
+
+name="Linux/X11"
+platform="Linux/X11"
+runnable=true
+custom_features=""
+export_filter="all_resources"
+include_filter=""
+exclude_filter=""
+export_path="bin/rapier_test.x86_64"
+patch_list=PoolStringArray(  )
+script_export_mode=1
+script_encryption_key=""
+
+[preset.0.options]
+
+texture_format/bptc=false
+texture_format/s3tc=true
+texture_format/etc=false
+texture_format/etc2=false
+texture_format/no_bptc_fallbacks=true
+binary_format/64_bits=true
+binary_format/embed_pck=false
+custom_template/release=""
+custom_template/debug=""