button press picking, rate limited

assets/coin.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dgo2frvws2o6f"
+path.s3tc="res://.godot/imported/coin.png-f04b9cd408b88aba3ab0966b4da32df0.s3tc.ctex"
+metadata={
+"imported_formats": ["s3tc_bptc"],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://assets/coin.png"
+dest_files=["res://.godot/imported/coin.png-f04b9cd408b88aba3ab0966b4da32df0.s3tc.ctex"]
+
+[params]
+
+compress/mode=2
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0

assets/coin_flower.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dw3x3h3f34sy3"
+path.bptc="res://.godot/imported/coin_flower.png-f7e515b96b6729484a68167e84f6e510.bptc.ctex"
+metadata={
+"imported_formats": ["s3tc_bptc"],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://assets/coin_flower.png"
+dest_files=["res://.godot/imported/coin_flower.png-f7e515b96b6729484a68167e84f6e510.bptc.ctex"]
+
+[params]
+
+compress/mode=2
+compress/high_quality=true
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0

assets/musics/mod118.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://bpmc2amg1kbfn"
+path="res://.godot/imported/mod118.ogg-227f261feb0690e0a8437a6b7afc3fd3.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/musics/mod118.ogg"
+dest_files=["res://.godot/imported/mod118.ogg-227f261feb0690e0a8437a6b7afc3fd3.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

assets/musics/mod147-medley.mp3.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="mp3"
+type="AudioStreamMP3"
+uid="uid://bknhw0jfylh6n"
+path="res://.godot/imported/mod147-medley.mp3-a64644be0457748ff3a2c3e975df9f1d.mp3str"
+
+[deps]
+
+source_file="res://assets/musics/mod147-medley.mp3"
+dest_files=["res://.godot/imported/mod147-medley.mp3-a64644be0457748ff3a2c3e975df9f1d.mp3str"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

assets/musics/mod170-toomanyfuckingdoors.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://cgv0sm3h1cttu"
+path="res://.godot/imported/mod170-toomanyfuckingdoors.ogg-c8c00bb4ac61939e013e8ce6fcf5df96.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/musics/mod170-toomanyfuckingdoors.ogg"
+dest_files=["res://.godot/imported/mod170-toomanyfuckingdoors.ogg-c8c00bb4ac61939e013e8ce6fcf5df96.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

assets/musics/sho.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://bxlatcfn5q4ty"
+path="res://.godot/imported/sho.ogg-b66af2140d9acc6f3e75264b00966446.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/musics/sho.ogg"
+dest_files=["res://.godot/imported/sho.ogg-b66af2140d9acc6f3e75264b00966446.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

assets/sfx/LICENSES

@@ -0,0 +1,2 @@
+land.wav - https://opengameart.org/content/3-item-sounds - CC-BY 3.0
+coinsplash.ogg - https://opengameart.org/content/coin-splash - No Rights Reserved

assets/sfx/coinsplash.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://dkxv7wbq8s1gs"
+path="res://.godot/imported/coinsplash.ogg-f4cc7a136a244c66d0c3ed8863b3a3e6.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/sfx/coinsplash.ogg"
+dest_files=["res://.godot/imported/coinsplash.ogg-f4cc7a136a244c66d0c3ed8863b3a3e6.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

assets/sfx/land.wav.import

@@ -0,0 +1,24 @@
+[remap]
+
+importer="wav"
+type="AudioStreamWAV"
+uid="uid://dy3ngeohp1uqf"
+path="res://.godot/imported/land.wav-6f339f0cb8abb44d119c317df4f4b636.sample"
+
+[deps]
+
+source_file="res://assets/sfx/land.wav"
+dest_files=["res://.godot/imported/land.wav-6f339f0cb8abb44d119c317df4f4b636.sample"]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=0

assets/shaders/interactivity_outline2.gdshader

@@ -0,0 +1,32 @@
+shader_type spatial;
+
+
+uniform float width : hint_range(0.0, 16.0);
+uniform vec4 outline_color : source_color;
+uniform sampler2D albedo_texture : source_color, filter_nearest;
+
+
+void vertex() {
+     MODELVIEW_MATRIX = VIEW_MATRIX * mat4(INV_VIEW_MATRIX[0], vec4(0, 1, 0, 0), INV_VIEW_MATRIX[2], MODEL_MATRIX[3]);
+}
+
+/* thanks gdquest */
+void fragment() {
+    vec2 size = vec2(width) / vec2(textureSize(albedo_texture, 0));
+
+    vec4 sprite_color = texture(albedo_texture, UV);
+
+    float alpha = sprite_color.a;
+    alpha += texture(albedo_texture, UV + vec2(0.0, -size.y)).a;
+    alpha += texture(albedo_texture, UV + vec2(size.x, -size.y)).a;
+    alpha += texture(albedo_texture, UV + vec2(size.x, 0.0)).a;
+    alpha += texture(albedo_texture, UV + vec2(size.x, size.y)).a;
+    alpha += texture(albedo_texture, UV + vec2(0.0, size.y)).a;
+    alpha += texture(albedo_texture, UV + vec2(-size.x, size.y)).a;
+    alpha += texture(albedo_texture, UV + vec2(-size.x, 0.0)).a;
+    alpha += texture(albedo_texture, UV + vec2(-size.x, -size.y)).a;
+
+    vec3 final_color = mix(outline_color.rgb, sprite_color.rgb, sprite_color.a);
+    ALBEDO = final_color;
+	ALPHA = clamp(alpha, 0.0, 1.0);
+}

assets/water-bomb.glb.import

@@ -0,0 +1,47 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://ba2mut58elwrh"
+path="res://.godot/imported/water-bomb.glb-e8fb14ce8e64d9818172ffab6efe431a.scn"
+
+[deps]
+
+source_file="res://assets/water-bomb.glb"
+dest_files=["res://.godot/imported/water-bomb.glb-e8fb14ce8e64d9818172ffab6efe431a.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/apply_root_scale=true
+nodes/root_scale=0.2
+nodes/import_as_skeleton_bones=false
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+_subresources={
+"materials": {
+"Sphere": {
+"use_external/enabled": true,
+"use_external/path": "res://assets/water_bomb_sphere_mat.tres"
+},
+"Top": {
+"use_external/enabled": true,
+"use_external/path": "res://assets/water_bomb_top_mat.tres"
+}
+}
+}
+gltf/naming_version=1
+gltf/embedded_image_handling=1

assets/water_bomb_sphere_mat.tres

@@ -0,0 +1,16 @@
+[gd_resource type="StandardMaterial3D" load_steps=3 format=3 uid="uid://ruycqsmlhsiw"]
+
+[ext_resource type="Shader" path="res://assets/shaders/interactivity_outline.gdshader" id="1_nmq18"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_gi5rt"]
+resource_local_to_scene = true
+render_priority = 0
+shader = ExtResource("1_nmq18")
+shader_parameter/color = Color(1, 1, 1, 0)
+shader_parameter/size = 1.24
+
+[resource]
+next_pass = SubResource("ShaderMaterial_gi5rt")
+albedo_color = Color(0.0936238, 0.825356, 1, 1)
+metallic = 0.8
+roughness = 0.4

assets/water_bomb_top_mat.tres

@@ -0,0 +1,16 @@
+[gd_resource type="StandardMaterial3D" load_steps=3 format=3 uid="uid://cm6b807gcxn4w"]
+
+[ext_resource type="Shader" path="res://assets/shaders/interactivity_outline.gdshader" id="1_wfrf5"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_phi16"]
+resource_local_to_scene = true
+render_priority = 0
+shader = ExtResource("1_wfrf5")
+shader_parameter/color = Color(1, 1, 1, 0)
+shader_parameter/size = 1.24
+
+[resource]
+next_pass = SubResource("ShaderMaterial_phi16")
+albedo_color = Color(0.207843, 0.211765, 0.8, 1)
+metallic = 0.2
+roughness = 0.5

data/coin.tres

@@ -0,0 +1,13 @@
+[gd_resource type="Resource" script_class="InventoryItem" load_steps=3 format=3 uid="uid://dbxrlw5ggh67j"]
+
+[ext_resource type="Texture2D" uid="uid://cb6qv3c0iojfl" path="res://icon.svg" id="1_eakc4"]
+[ext_resource type="Script" path="res://src/lib/inventory_item.gd" id="2_lrh23"]
+
+[resource]
+script = ExtResource("2_lrh23")
+icon = ExtResource("1_eakc4")
+name = "Coin"
+id = &"coin"
+stackable = true
+stack_limit = 100
+sells_for = 1

data/coin_flower.tres

@@ -0,0 +1,13 @@
+[gd_resource type="Resource" script_class="InventoryItem" load_steps=3 format=3 uid="uid://nrpcuqveh7io"]
+
+[ext_resource type="Texture2D" uid="uid://dw3x3h3f34sy3" path="res://assets/coin_flower.png" id="1_vrj0d"]
+[ext_resource type="Script" path="res://src/lib/inventory_item.gd" id="3_fe16f"]
+
+[resource]
+script = ExtResource("3_fe16f")
+icon = ExtResource("1_vrj0d")
+name = "Coin Flower"
+id = &"coin_flower"
+stackable = true
+stack_limit = 9
+sells_for = 2

data/meat.tres

@@ -0,0 +1,11 @@
+[gd_resource type="Resource" script_class="InventoryItem" load_steps=3 format=3 uid="uid://cbbclpp04ptlf"]
+
+[ext_resource type="Texture2D" uid="uid://cb6qv3c0iojfl" path="res://icon.svg" id="1_2wt7x"]
+[ext_resource type="Script" path="res://src/lib/inventory_item.gd" id="2_inc63"]
+
+[resource]
+script = ExtResource("2_inc63")
+icon = ExtResource("1_2wt7x")
+name = "Meat"
+id = &"meat"
+count = 0

data/water_bomb.tres

@@ -0,0 +1,17 @@
+[gd_resource type="Resource" script_class="InventoryItem" load_steps=5 format=3 uid="uid://cmeif37pci2ek"]
+
+[ext_resource type="Texture2D" uid="uid://cb6qv3c0iojfl" path="res://icon.svg" id="1_g8c3q"]
+[ext_resource type="PackedScene" uid="uid://tdsbo3e5ic86" path="res://src/ingame/water_bomb.tscn" id="1_t62t2"]
+[ext_resource type="PackedScene" uid="uid://ba2mut58elwrh" path="res://assets/water-bomb.glb" id="2_5cxkh"]
+[ext_resource type="Script" path="res://src/lib/inventory_item.gd" id="2_pe2p8"]
+
+[resource]
+script = ExtResource("2_pe2p8")
+icon = ExtResource("1_g8c3q")
+model = ExtResource("2_5cxkh")
+bomb = ExtResource("1_t62t2")
+name = "Water Bomb"
+id = &"water_bomb"
+stackable = false
+stack_limit = 8
+sells_for = 0

default_bus_layout.tres

@@ -1,10 +1,15 @@
 [gd_resource type="AudioBusLayout" format=3 uid="uid://dcxpomrfumov"]
 
 [resource]
-bus/0/volume_db = -8.00903
-bus/1/name = &"SoundEffects"
+bus/1/name = &"Music"
 bus/1/solo = false
 bus/1/mute = false
 bus/1/bypass_fx = false
-bus/1/volume_db = 0.0
+bus/1/volume_db = -4.25003
 bus/1/send = &"Master"
+bus/2/name = &"SoundEffects"
+bus/2/solo = false
+bus/2/mute = false
+bus/2/bypass_fx = false
+bus/2/volume_db = -10.0692
+bus/2/send = &"Master"

project.godot

@@ -28,6 +28,7 @@ window/stretch/aspect="expand"
 
 spawn_points=""
 voids=""
+sell_boxes=""
 
 [input]
 

scenes/water_bomb_model.tscn

@@ -1,23 +0,0 @@
-[gd_scene load_steps=4 format=3 uid="uid://s2a1pry5fw8f"]
-
-[ext_resource type="Shader" path="res://scenes/interactivity_outline.gdshader" id="1_m18kw"]
-
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_gi5rt"]
-resource_local_to_scene = true
-render_priority = 0
-shader = ExtResource("1_m18kw")
-shader_parameter/color = Color(1, 1, 1, 0)
-shader_parameter/size = 1.24
-
-[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_ptaep"]
-resource_local_to_scene = true
-next_pass = SubResource("ShaderMaterial_gi5rt")
-albedo_color = Color(0.0936238, 0.825356, 1, 1)
-metallic = 0.8
-roughness = 0.4
-
-[node name="Model" type="CSGSphere3D"]
-material_override = SubResource("StandardMaterial3D_ptaep")
-radius = 0.2
-radial_segments = 24
-rings = 12

src/ingame/bomb.gd

@@ -0,0 +1,158 @@
+class_name Bomb extends Node3D
+
+# TODO: have those in item db instead ?
+@export var _splash_small_sound: AudioStreamPlayer3D
+@export var _splash_small_quiet_sound: AudioStreamPlayer3D
+@export var _sell_sound: AudioStreamPlayer3D
+@export var _model: Node3D
+@export var _splash_particles: GPUParticles3D
+@export var _sell_particles: GPUParticles3D
+@export var _picking_area: Area3D
+@export var body: RigidBody3D
+@export var billboard := false
+
+## Initials to construct from
+@export var item_id := &"ID"
+@export var item_count := 0
+
+## Will be constructed as { item_id, item_count }, but could be edited after
+## Use set_item_bundle() if it's dynamically assigned, after adding to the scene
+@export var item_bundle: Dictionary
+
+## Effect of splhashing.
+@export_enum("none", "water") var splash_function := "none"
+
+## no longer exists and shouldn't be considered, but not ready to be freed yet
+var is_dead := false
+
+## something to ignore
+var sender_id: int
+var sender_body: PhysicsBody3D
+
+var _in_splash_range := {}
+
+
+func _ready() -> void:
+	body.process_mode = Node.PROCESS_MODE_DISABLED
+
+
+func _enter_tree() -> void:
+	if item_bundle.is_empty():
+		item_bundle = {
+			"item_id": item_id,
+			"count": item_count
+		}
+
+
+@rpc("authority", "call_local", "reliable")
+func set_item_bundle(p_item_bundle: Dictionary) -> void:
+	item_bundle = p_item_bundle
+	if _model.has_method("reflect_bundle"):
+		_model.reflect_bundle(item_bundle)
+
+
+func _process(delta: float) -> void:
+	# spin around, no need to replicate this
+	if not billboard:
+		_model.basis = _model.basis.rotated(Vector3(1, 0, 0), -((TAU*2) * delta))
+		_model.basis = _model.basis.orthonormalized()
+	
+	if not is_multiplayer_authority():
+		return
+	
+	# TODO: interpolate for non-authority clients
+	#		or, do we *really* care about synchronicity? could simulate it independently.
+	global_position = body.global_position
+
+
+@rpc("authority", "call_local", "reliable")
+func _disable_body() -> void:
+	# not using synchronizer for this because it ends up enabling processing
+	# on other clients
+	(func() -> void: body.process_mode = Node.PROCESS_MODE_DISABLED).call_deferred()
+	_picking_area.collision_layer = 0
+
+
+func _on_body_entered(p_body: Node3D) -> void:
+	if p_body == sender_body:
+		return
+
+	if p_body.is_in_group("voids"):
+		queue_free()
+		return
+	
+	if p_body.is_in_group("sell_boxes"):
+		var item := GameState.fetch().INVENTORY_ITEM_DB[item_bundle["item_id"]] as InventoryItem
+		if item.sells_for != 0:
+			get_node("/root/Main").add_inventory_item.rpc(&"coin", item.sells_for * item_bundle["count"])
+			if _sell_sound != null:
+				_sell_sound.play()
+				if _sell_particles != null:
+					_sell_particles.amount =  item.sells_for * item_bundle["count"]
+					_sell_particles.emitting = true
+				is_dead = true
+				_model.hide()
+				_disable_body.rpc()
+				await _sell_particles.finished
+			queue_free()
+		return
+	
+	if splash_function == "water":
+		for area: Area3D in _in_splash_range:
+			area.get_parent_node_3d().water.rpc_id(1, sender_id)
+	
+	if _splash_small_sound != null and sender_id != 0:
+		_splash_small_sound.play()
+	if _splash_small_quiet_sound:
+		_splash_small_quiet_sound.play()
+	if _splash_particles:
+		_splash_particles.emitting = true
+	
+	is_dead = true
+	_model.hide()
+	_disable_body.rpc()
+
+	if _splash_small_sound != null and sender_id != 0:
+		await _splash_small_sound.finished
+	if _splash_small_quiet_sound != null and _splash_small_quiet_sound.playing:
+		await _splash_small_quiet_sound.finished
+
+	queue_free()
+
+
+func _on_splash_area_entered(area: Area3D) -> void:
+	_in_splash_range[area] = true
+
+
+func _on_splash_area_exited(area: Area3D) -> void:
+	_in_splash_range.erase(area)
+
+
+@rpc("authority", "call_local", "reliable")
+func set_global_pos(new: Vector3) -> void:
+	global_position = new
+	body.global_position = new
+	body.reset_physics_interpolation()
+
+
+@rpc("any_peer", "call_local", "reliable")
+func get_picked_up() -> void:
+	if is_multiplayer_authority():
+		queue_free()
+
+
+func mark_interactive() -> void:
+	# TODO: whatever
+	if _model.scene_file_path == "res://assets/water-bomb.glb":
+		for submodel in _model.get_children():
+			(submodel as MeshInstance3D).mesh.surface_get_material(0).next_pass.set("shader_parameter/color", Color.WHITE)
+	elif _model.scene_file_path == "res://src/ingame/quad_viewmodel.tscn":
+		_model.mesh.material_override.set("shader_parameter/outline_color", Color.WHITE)
+
+
+func mark_non_interactive() -> void:
+	if _model.scene_file_path == "res://assets/water-bomb.glb":
+		for submodel in _model.get_children():
+			(submodel as MeshInstance3D).mesh.surface_get_material(0).next_pass.set("shader_parameter/color", Color(1, 1, 1, 0))
+	elif _model.scene_file_path == "res://src/ingame/quad_viewmodel.tscn":
+		_model.mesh.material_override.set("shader_parameter/outline_color", Color.BLACK)

src/ingame/ingame.gd

@@ -2,6 +2,7 @@ extends Node3D
 
 @export var _player_scene: PackedScene
 
+@export var _soundtrack: AudioStreamPlayer
 @export var _players: Node3D
 @export var _chat_panel: Panel
 @export var _chat_input: LineEdit
@@ -10,6 +11,16 @@ extends Node3D
 @export var _chat_panel_inactive: Panel
 @export var _chat_history_inactive: VBoxContainer
 @export var _chat_history_scroll_inactive: ScrollContainer
+@export var _coin_label: RichTextLabel
+
+## Things to yet play, so to not repeat ourselves much.
+const PLAYLIST: Array[String] = [
+	"res://assets/musics/mod118.ogg",
+	"res://assets/musics/mod147-medley.mp3",
+	"res://assets/musics/mod170-toomanyfuckingdoors.ogg",
+	"res://assets/musics/sho.ogg",
+]
+var _playlist_remaining: Array[String]
 
 
 func _ready() -> void:
@@ -39,6 +50,19 @@ func _ready() -> void:
 	if not OS.has_feature("dedicated_server"):
 		_add_player.call_deferred(1)
 
+	if not "--join" in OS.get_cmdline_args():
+		_soundtrack.finished.connect(_play_new_track)
+		_play_new_track()
+
+# TODO: sync what's played for peers, server controlled
+func _play_new_track():
+	if _playlist_remaining.size() == 0:
+		_playlist_remaining = PLAYLIST.duplicate()
+	var selection = _playlist_remaining.pick_random()
+	_playlist_remaining.erase(selection)
+	_soundtrack.stream = load(selection)
+	_soundtrack.play()
+
 
 func _exit_tree() -> void:
 	if not multiplayer.is_server():
@@ -60,6 +84,11 @@ func _input(event: InputEvent) -> void:
 		_deactivate_chat()
 
 
+func _process(_delta: float) -> void:
+	# this is fine but should this be done in response to a signal instead?
+	_coin_label.text = "COIN: %d" % GameState.get_item_count(&"coin")
+
+
 func _activate_chat() -> void:
 	_chat_panel.show()
 	_chat_panel_inactive.hide()
@@ -77,7 +106,7 @@ func _deactivate_chat() -> void:
 
 func _add_player(id: int) -> void:
 	print("add player %d" % id)
-	var character: CharacterBody3D = _player_scene.instantiate()
+	var character: Player = _player_scene.instantiate()
 	character.id = id
 	character.name = str(id)
 	_players.add_child(character, true)
@@ -109,20 +138,33 @@ func _submit_chat_message(text: String) -> void:
 
 @rpc("authority", "call_local", "reliable", 1)
 func _add_chat_message(username: String, text: String) -> void:
-	_chat_history.add_child(_make_chat_message(username, text))
-	_chat_history_inactive.add_child(_make_chat_message(username, text))
+	_chat_history.add_child(_make_chat_message(username, text, false))
+	_chat_history_inactive.add_child(_make_chat_message(username, text, true))
 
 
 func _on_chat_history_scroll_changed(history: ScrollContainer) -> void:
 	# keep history scrolled to the bottom
-	history.scroll_vertical = history.get_v_scroll_bar().max_value
+	history.scroll_vertical = int(history.get_v_scroll_bar().max_value)
 
 
-func _make_chat_message(username: String, text: String) -> RichTextLabel:
+func _fade_inactive_chat_message(p_label: RichTextLabel) -> void:
+	var start := Time.get_ticks_msec()
+	while true:
+		var now := Time.get_ticks_msec()
+		if now - start >= 10000: break
+		p_label.add_theme_color_override("default_color", Color(0, 0, 0, 1.0 - (now - start) / 10000.0 ))
+		await get_tree().process_frame
+	p_label.queue_free()
+
+
+func _make_chat_message(username: String, text: String, inactive: bool) -> RichTextLabel:
 	var label := RichTextLabel.new()
 	label.bbcode_enabled = true
 	label.fit_content = true
 	label.append_text("[color=red]%s[/color] %s" % [username.replace("[", "[lb]"), text.replace("[", "[lb]")])
+	if inactive:
+		label.add_theme_color_override("default_color", Color.BLACK)
+		_fade_inactive_chat_message(label)
 	return label
 
 
@@ -131,6 +173,6 @@ func _on_chat_message_submitted(new_text := "") -> void:
 		_deactivate_chat()
 		return
 	
-	_submit_chat_message.rpc_id(1, _chat_input.text)
+	_submit_chat_message.rpc_id(1, new_text)
 	_chat_input.clear()
 	_deactivate_chat()

src/ingame/ingame.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=13 format=3 uid="uid://oyvhcwq60v2"]
+[gd_scene load_steps=16 format=3 uid="uid://oyvhcwq60v2"]
 
 [ext_resource type="Script" path="res://src/ingame/ingame.gd" id="1_akuuj"]
 [ext_resource type="PackedScene" uid="uid://cs8c570bxh6u" path="res://src/ingame/player.tscn" id="2_w1gjc"]
@@ -32,9 +32,21 @@ sky = SubResource("Sky_ygvd3")
 ambient_light_color = Color(0, 0.164706, 0.278431, 1)
 ambient_light_energy = 2.0
 
-[node name="Ingame" type="Node3D" node_paths=PackedStringArray("_players", "_chat_panel", "_chat_input", "_chat_history_scroll", "_chat_history", "_chat_panel_inactive", "_chat_history_inactive", "_chat_history_scroll_inactive")]
+[sub_resource type="BoxShape3D" id="BoxShape3D_3215c"]
+size = Vector3(3, 1, 3)
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_vx5ut"]
+transparency = 1
+albedo_color = Color(1, 1, 0, 0.698039)
+
+[sub_resource type="BoxMesh" id="BoxMesh_gygr8"]
+material = SubResource("StandardMaterial3D_vx5ut")
+size = Vector3(3, 1, 3)
+
+[node name="Ingame" type="Node3D" node_paths=PackedStringArray("_soundtrack", "_players", "_chat_panel", "_chat_input", "_chat_history_scroll", "_chat_history", "_chat_panel_inactive", "_chat_history_inactive", "_chat_history_scroll_inactive", "_coin_label")]
 script = ExtResource("1_akuuj")
 _player_scene = ExtResource("2_w1gjc")
+_soundtrack = NodePath("Soundtrack")
 _players = NodePath("Players")
 _chat_panel = NodePath("UI/ChatPanel")
 _chat_input = NodePath("UI/ChatPanel/ChatInput")
@@ -43,10 +55,15 @@ _chat_history = NodePath("UI/ChatPanel/ChatHistoryScroll/ChatHistory")
 _chat_panel_inactive = NodePath("UI/ChatPanelInactive")
 _chat_history_inactive = NodePath("UI/ChatPanelInactive/ChatHistoryScroll/ChatHistory")
 _chat_history_scroll_inactive = NodePath("UI/ChatPanelInactive/ChatHistoryScroll")
+_coin_label = NodePath("UI/CoinLabel")
 
-[node name="UI" type="CanvasLayer" parent="." node_paths=PackedStringArray("_combo_timer")]
+[node name="Soundtrack" type="AudioStreamPlayer" parent="."]
+bus = &"Music"
+
+[node name="UI" type="CanvasLayer" parent="." node_paths=PackedStringArray("_combo_timer", "_combo_label")]
 script = ExtResource("3_p340v")
 _combo_timer = NodePath("ComboTimer")
+_combo_label = NodePath("Combo")
 
 [node name="ChatPanel" type="Panel" parent="UI"]
 visible = false
@@ -138,29 +155,30 @@ vertical_scroll_mode = 3
 [node name="ChatHistory" type="VBoxContainer" parent="UI/ChatPanelInactive/ChatHistoryScroll"]
 layout_mode = 2
 size_flags_horizontal = 3
-size_flags_vertical = 3
-
-[node name="Combo" type="Label" parent="UI"]
-visible = false
-self_modulate = Color(0.534784, 0.97046, 3.46541e-06, 1)
-anchors_preset = 8
-anchor_left = 0.5
-anchor_top = 0.5
-anchor_right = 0.5
-anchor_bottom = 0.5
-offset_left = -20.0
-offset_top = -11.5
-offset_right = 20.0
-offset_bottom = 11.5
-grow_horizontal = 2
-grow_vertical = 2
-size_flags_horizontal = 4
-text = "+5!"
+size_flags_vertical = 10
 
 [node name="ComboTimer" type="Timer" parent="UI"]
 wait_time = 3.0
 one_shot = true
 
+[node name="CoinLabel" type="RichTextLabel" parent="UI"]
+clip_contents = false
+offset_left = 16.0
+offset_top = 16.0
+offset_right = 192.0
+offset_bottom = 40.0
+theme_override_constants/outline_size = 6
+text = "Coins: 0"
+
+[node name="Combo" type="RichTextLabel" parent="UI"]
+clip_contents = false
+offset_left = 16.0
+offset_top = 32.0
+offset_right = 192.0
+offset_bottom = 56.0
+theme_override_colors/default_color = Color(0.695503, 0.695503, 0.695503, 1)
+theme_override_constants/outline_size = 6
+
 [node name="CSGBox3D" type="CSGBox3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 7.45058e-09, 0)
 collision_mask = 0
@@ -217,9 +235,6 @@ environment = SubResource("Environment_ijk14")
 transform = Transform3D(0.943957, 0.3178, 0.0891561, 0, -0.270113, 0.962829, 0.33007, -0.908868, -0.254975, 0, 0, 0)
 light_energy = 2.0
 
-[node name="SpawnPoint" type="Marker3D" parent="." groups=["spawn_points"]]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
-
 [node name="PlayerSpawner" type="MultiplayerSpawner" parent="."]
 _spawnable_scenes = PackedStringArray("res://src/ingame/player.tscn")
 spawn_path = NodePath("../Players")
@@ -288,6 +303,28 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -6.59598, 1.39617, -1.62022)
 [node name="Pipe" parent="." instance=ExtResource("4_mltw3")]
 transform = Transform3D(0.999929, -0.0119378, 0, -0.0119378, -0.999929, 8.74228e-08, -1.04363e-09, -8.74165e-08, -1, -7, 6.79123, 7)
 
+[node name="SpawnPoints" type="Node3D" parent="."]
+
+[node name="SpawnPoint" type="Marker3D" parent="SpawnPoints" groups=["spawn_points"]]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
+
+[node name="SpawnPoint2" type="Marker3D" parent="SpawnPoints" groups=["spawn_points"]]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -5.15702, 1.04855, 5.88574)
+
+[node name="SpawnPoint3" type="Marker3D" parent="SpawnPoints" groups=["spawn_points"]]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 2.43229, 0.627689, 7.20138)
+
+[node name="SellBox" type="StaticBody3D" parent="." groups=["sell_boxes"]]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8, 0, 0)
+collision_layer = 0
+collision_mask = 4
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="SellBox"]
+shape = SubResource("BoxShape3D_3215c")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="SellBox"]
+mesh = SubResource("BoxMesh_gygr8")
+
 [connection signal="text_submitted" from="UI/ChatPanel/ChatInput" to="." method="_on_chat_message_submitted"]
 [connection signal="pressed" from="UI/ChatPanel/ChatSendButton" to="." method="_on_chat_message_submitted"]
 [connection signal="timeout" from="UI/ComboTimer" to="UI" method="_on_combo_timer_timeout"]

src/ingame/item_bomb.tscn

@@ -0,0 +1,162 @@
+[gd_scene load_steps=17 format=3 uid="uid://bpvbnlhpth4w7"]
+
+[ext_resource type="Script" path="res://src/ingame/bomb.gd" id="1_27lur"]
+[ext_resource type="PackedScene" uid="uid://dxb5f3il2h1ur" path="res://src/ingame/quad_viewmodel.tscn" id="2_fy6j6"]
+[ext_resource type="AudioStream" uid="uid://dy3ngeohp1uqf" path="res://assets/sfx/land.wav" id="3_1vo65"]
+[ext_resource type="AudioStream" uid="uid://dkxv7wbq8s1gs" path="res://assets/sfx/coinsplash.ogg" id="4_fyu6c"]
+[ext_resource type="Texture2D" uid="uid://dgo2frvws2o6f" path="res://assets/coin.png" id="5_om8wy"]
+
+[sub_resource type="SceneReplicationConfig" id="SceneReplicationConfig_0ebrr"]
+properties/0/path = NodePath(".:position")
+properties/0/spawn = true
+properties/0/replication_mode = 1
+properties/1/path = NodePath(".:is_dead")
+properties/1/spawn = true
+properties/1/replication_mode = 2
+properties/2/path = NodePath(".:rotation")
+properties/2/spawn = true
+properties/2/replication_mode = 1
+properties/3/path = NodePath(".:item_bundle")
+properties/3/spawn = true
+properties/3/replication_mode = 2
+properties/4/path = NodePath("Model:visible")
+properties/4/spawn = true
+properties/4/replication_mode = 2
+properties/5/path = NodePath("SellParticles:emitting")
+properties/5/spawn = true
+properties/5/replication_mode = 2
+properties/6/path = NodePath("DropSound:playing")
+properties/6/spawn = true
+properties/6/replication_mode = 2
+properties/7/path = NodePath("SellSound:playing")
+properties/7/spawn = true
+properties/7/replication_mode = 2
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_v7dnr"]
+albedo_color = Color(0, 1, 1, 1)
+roughness = 0.2
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_rjbgm"]
+direction = Vector3(0, 1, 0)
+initial_velocity_min = 5.0
+initial_velocity_max = 5.0
+gravity = Vector3(0, -8, 0)
+collision_mode = 2
+
+[sub_resource type="SphereMesh" id="SphereMesh_bhdh4"]
+radius = 0.1
+height = 0.2
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_6c830"]
+radius = 0.2
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_y6453"]
+radius = 1.5
+
+[sub_resource type="Gradient" id="Gradient_qoklw"]
+offsets = PackedFloat32Array(0.0454545, 0.836364, 0.981818)
+colors = PackedColorArray(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)
+
+[sub_resource type="GradientTexture1D" id="GradientTexture1D_fdtmr"]
+gradient = SubResource("Gradient_qoklw")
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_yncjw"]
+lifetime_randomness = 0.2
+inherit_velocity_ratio = 0.1
+direction = Vector3(0, 1, 0)
+spread = 180.0
+initial_velocity_max = 3.0
+gravity = Vector3(0, 0, 0)
+linear_accel_min = -6.9
+linear_accel_max = -3.45
+color_ramp = SubResource("GradientTexture1D_fdtmr")
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_ooyci"]
+transparency = 1
+shading_mode = 0
+vertex_color_use_as_albedo = true
+albedo_texture = ExtResource("5_om8wy")
+
+[sub_resource type="QuadMesh" id="QuadMesh_4d5bh"]
+material = SubResource("StandardMaterial3D_ooyci")
+size = Vector2(0.25, 0.25)
+
+[node name="ItemBomb" type="Node3D" node_paths=PackedStringArray("_splash_small_sound", "_sell_sound", "_model", "_sell_particles", "_picking_area", "body")]
+script = ExtResource("1_27lur")
+_splash_small_sound = NodePath("DropSound")
+_sell_sound = NodePath("SellSound")
+_model = NodePath("Model")
+_sell_particles = NodePath("SellParticles")
+_picking_area = NodePath("PickingArea")
+body = NodePath("RigidBody3D")
+billboard = true
+
+[node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
+replication_config = SubResource("SceneReplicationConfig_0ebrr")
+
+[node name="Model" parent="." instance=ExtResource("2_fy6j6")]
+
+[node name="SplashParticles" type="GPUParticles3D" parent="."]
+visible = false
+material_override = SubResource("StandardMaterial3D_v7dnr")
+emitting = false
+amount = 32
+lifetime = 2.0
+one_shot = true
+explosiveness = 1.0
+randomness = 1.0
+process_material = SubResource("ParticleProcessMaterial_rjbgm")
+draw_pass_1 = SubResource("SphereMesh_bhdh4")
+
+[node name="RigidBody3D" type="RigidBody3D" parent="."]
+top_level = true
+collision_layer = 4
+collision_mask = 3
+contact_monitor = true
+max_contacts_reported = 1
+linear_damp_mode = 1
+linear_damp = 0.3
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="RigidBody3D"]
+shape = SubResource("SphereShape3D_6c830")
+
+[node name="SplashArea" type="Area3D" parent="RigidBody3D"]
+collision_layer = 0
+collision_mask = 8
+monitorable = false
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="RigidBody3D/SplashArea"]
+shape = SubResource("SphereShape3D_y6453")
+
+[node name="PickingArea" type="Area3D" parent="."]
+collision_layer = 16
+collision_mask = 0
+monitoring = false
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="PickingArea"]
+shape = SubResource("SphereShape3D_6c830")
+
+[node name="DropSound" type="AudioStreamPlayer3D" parent="."]
+stream = ExtResource("3_1vo65")
+volume_db = 10.0
+bus = &"SoundEffects"
+
+[node name="SellSound" type="AudioStreamPlayer3D" parent="."]
+stream = ExtResource("4_fyu6c")
+volume_db = 2.0
+bus = &"SoundEffects"
+
+[node name="SellParticles" type="GPUParticles3D" parent="."]
+emitting = false
+amount = 32
+lifetime = 2.0
+one_shot = true
+speed_scale = 0.5
+explosiveness = 1.0
+randomness = 0.4
+process_material = SubResource("ParticleProcessMaterial_yncjw")
+draw_pass_1 = SubResource("QuadMesh_4d5bh")
+
+[connection signal="body_entered" from="RigidBody3D" to="." method="_on_body_entered"]
+[connection signal="area_entered" from="RigidBody3D/SplashArea" to="." method="_on_splash_area_entered"]
+[connection signal="area_exited" from="RigidBody3D/SplashArea" to="." method="_on_splash_area_exited"]

src/ingame/pipe.gd

@@ -2,6 +2,7 @@ extends Node3D
 
 @export var _projectile_scene: PackedScene
 @export var _projectile_holder: Node
+@warning_ignore("unused_private_class_variable")
 @export var _production_timer: Timer
 
 
@@ -14,7 +15,7 @@ func _drop_water() -> void:
 	_projectile_holder.add_child(new_projectile, true)
 	new_projectile.set_multiplayer_authority(1)
 	new_projectile.body.process_mode = Node.PROCESS_MODE_INHERIT
-	new_projectile.set_global_pos(global_position)
+	new_projectile.set_global_pos.rpc(global_position)
 
 
 func _on_drop_timer_timeout() -> void:

src/ingame/pipe.tscn

@@ -3,13 +3,13 @@
 [ext_resource type="Script" path="res://src/ingame/pipe.gd" id="1_ckmpn"]
 [ext_resource type="PackedScene" uid="uid://tdsbo3e5ic86" path="res://src/ingame/water_bomb.tscn" id="2_3sfu2"]
 
-[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_bgwg2"]
-cull_mode = 2
-albedo_color = Color(0.0313726, 1, 1, 1)
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_ecwtt"]
+albedo_color = Color(0, 1, 1, 1)
 
-[sub_resource type="PlaneMesh" id="PlaneMesh_g3bb5"]
-lightmap_size_hint = Vector2i(12, 12)
-material = SubResource("StandardMaterial3D_bgwg2")
+[sub_resource type="SphereMesh" id="SphereMesh_504u5"]
+material = SubResource("StandardMaterial3D_ecwtt")
+height = 0.001
+rings = 1
 
 [node name="Pipe" type="Node3D" node_paths=PackedStringArray("_projectile_holder", "_production_timer")]
 script = ExtResource("1_ckmpn")
@@ -22,12 +22,12 @@ _spawnable_scenes = PackedStringArray("res://src/ingame/water_bomb.tscn")
 spawn_path = NodePath("../ProjectileHolder")
 
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]
-mesh = SubResource("PlaneMesh_g3bb5")
+mesh = SubResource("SphereMesh_504u5")
 
 [node name="ProjectileHolder" type="Node" parent="."]
 
 [node name="DropTimer" type="Timer" parent="."]
-wait_time = 2.0
+wait_time = 2.5
 autostart = true
 
 [connection signal="timeout" from="DropTimer" to="." method="_on_drop_timer_timeout"]

src/ingame/player.gd

@@ -1,11 +1,8 @@
-extends CharacterBody3D
-
+class_name Player extends CharacterBody3D
 
 const SPEED = 5.0
 const JUMP_VELOCITY = 4.5
 
-@export var _projectile_scene: PackedScene
-
 @export var _projectile_holder: Node
 @export var _projectile_point: Marker3D
 @export var _camera_pivot: Node3D
@@ -17,7 +14,7 @@ const JUMP_VELOCITY = 4.5
 @export var input_dir := Vector2()
 @export var input_jumped := false
 
-var _max_speed := 12
+var _max_speed := 16
 var _mouse_sensitivity := 0.008  # radians/pixel
 
 var _projectile_speed := 12.0
@@ -25,7 +22,14 @@ var _projectile_speed := 12.0
 var _interaction_selection: Node3D
 
 var controls_disabled := false
-var held_thing: String
+@export var held_thing := { "item_id": &"empty_hand", "count": 0 }
+
+## Whether picking input is pressed right now
+var _picking := false
+## Used to limit picking rate, potentially upgradable
+var _last_picked := 0
+var _picks_per_second := 3
+
 
 # What the others see.
 func _init_bystander() -> void:
@@ -41,6 +45,7 @@ func _ready() -> void:
 	$Model.hide()
 	_camera.make_current()
 	
+	# TODO: reliable rng
 	var spawn_point: Marker3D = get_tree().get_nodes_in_group("spawn_points").pick_random()
 	global_position = spawn_point.global_position
 	reset_physics_interpolation()
@@ -55,17 +60,21 @@ func _process(_delta: float) -> void:
 
 func _physics_process(delta: float) -> void:
 	## Process interactivity selection.
+	if id == multiplayer.get_unique_id():
 		var collider: Object = null
 		if _line_of_sight.is_colliding():
-		collider = _line_of_sight.get_collider(0)
+			var possible_collider = _line_of_sight.get_collider(0)
+			if empty_handed(): collider = possible_collider
+			elif possible_collider and \
+					GameState.are_bundles_stackable(held_thing, possible_collider.owner.item_bundle):
+				collider = possible_collider
 		if collider != _interaction_selection:
 			if _interaction_selection != null:
 				_interaction_selection.get_parent().mark_non_interactive()
 			if collider != null:
-			collider.get_parent().mark_interactive()
+				collider.owner.mark_interactive()
 		_interaction_selection = collider
 
-
 	# Add the gravity.
 	if not is_on_floor():
 		velocity += get_gravity() * delta
@@ -75,7 +84,6 @@ func _physics_process(delta: float) -> void:
 		velocity.y = JUMP_VELOCITY
 	
 	# Get the input direction and handle the movement/deceleration.
-	# As good practice, you should replace UI actions with custom gameplay actions.
 	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
 	if direction:
 		velocity.x = direction.x * SPEED
@@ -84,19 +92,61 @@ func _physics_process(delta: float) -> void:
 		velocity.x = move_toward(velocity.x, 0, SPEED)
 		velocity.z = move_toward(velocity.z, 0, SPEED)
 	
-	move_and_slide()
+	if velocity.length() > _max_speed:
+		velocity = velocity.clampf(0, _max_speed)
+	
+	$StairStepper.stair_step_up(direction)
+	
+	if move_and_slide() and is_on_floor():
+		for idx in range(get_slide_collision_count()):
+			var collision := get_slide_collision(idx)
+			if collision.get_collider().is_in_group("voids"):
+				# TODO: reliable rng
+				var spawn_point: Marker3D = get_tree().get_nodes_in_group("spawn_points").pick_random()
+				global_position = spawn_point.global_position
+				reset_physics_interpolation()
+
+	$StairStepper.stair_step_down()
 
 
 @rpc("any_peer", "call_local", "reliable")
-func hold_thing() -> void:
-	held_thing = "water"
-	_camera_pivot.get_node("HeldViewmodel").show()
+func hold_thing(p_bundle: Dictionary) -> void:
+	var item := GameState.fetch().INVENTORY_ITEM_DB[p_bundle["item_id"]] as InventoryItem
+	held_thing = p_bundle
+	var base_node := _camera_pivot.get_node("HeldViewmodel")
+	for child in base_node.get_children():
+		child.queue_free()
+	if item.model != null:
+		var model = item.model.instantiate()
+		base_node.add_child(model)
+	else:
+		# Create a icon sprite based one instead.
+		var model := preload("res://src/ingame/quad_viewmodel.tscn").instantiate()
+		model.reflect_bundle(p_bundle)
+		base_node.add_child(model)
+
+	if item.model != null and id == multiplayer.get_unique_id():
+		# Disable depth test and increase render priority.
+		# TODO: in more complex scenarios model scene might want to have its own callback for this.
+		for model in base_node.get_children():
+			for submodel in model.get_children():
+				var mesh := submodel.mesh.duplicate() as Mesh
+				var material := mesh.surface_get_material(0).duplicate()
+				material.render_priority += 1
+				material.no_depth_test = true
+				mesh.surface_set_material(0, material)
+				submodel.mesh = mesh
 
 
 @rpc("any_peer", "call_local", "reliable")
 func throw_thing() -> void:
-	held_thing = ""
-	_camera_pivot.get_node("HeldViewmodel").hide()
+	held_thing = { "item_id": &"empty_hand", "count": 0 }
+	for child in _camera_pivot.get_node("HeldViewmodel").get_children():
+		child.queue_free()
+
+
+func empty_handed() -> bool:
+	return held_thing["item_id"] == &"empty_hand"
 
 
 func _unhandled_input(event: InputEvent) -> void:
@@ -109,16 +159,19 @@ func _unhandled_input(event: InputEvent) -> void:
 		_camera_pivot.rotation.x = clamp(_camera_pivot.rotation.x, -1.2, 1.2)
 		return
 	
-	if event.is_action_pressed("pick") and held_thing == "":
-		if _interaction_selection != null:
-			_interaction_selection.get_parent().get_picked_up.rpc()
-			hold_thing.rpc()
+	if event.is_action_pressed("pick"):
+		_picking = true
+	if event.is_action_released("pick"):
+		_picking = false
 	
-	if event.is_action_pressed("fire") and held_thing != "":
-		var new_projectile: Node3D = _projectile_scene.instantiate()
+	if event.is_action_pressed("fire") and not empty_handed():
+		var item := GameState.fetch().INVENTORY_ITEM_DB[held_thing["item_id"]] as InventoryItem
+		var new_projectile: Node3D = item.bomb.instantiate()
 		_projectile_holder.add_child(new_projectile, true)
 		_set_projectile_authority.rpc(new_projectile.get_path(), id)
+		new_projectile.set_item_bundle.rpc(held_thing)
 		new_projectile.set_global_pos.rpc(_projectile_point.global_position)
+		new_projectile.rotation = rotation
 		new_projectile.sender_body = self
 		new_projectile.sender_id = id
 		
@@ -138,10 +191,23 @@ func _set_projectile_authority(path: NodePath, authority_id: int) -> void:
 
 
 func _process_input() -> void:
-	if controls_disabled:
+	if controls_disabled or id != multiplayer.get_unique_id():
 		input_dir = Vector2.ZERO
 		input_jumped = false
 		return
 	
 	input_dir = Input.get_vector("strafe_left", "strafe_right", "move_forward", "move_backward")
 	input_jumped = Input.is_action_just_pressed("jump")
+	
+	if _picking and (Time.get_ticks_msec() - _last_picked) >= (1000.0 / _picks_per_second) \
+			and _interaction_selection != null:
+		if empty_handed():
+			_last_picked = Time.get_ticks_msec()
+			_interaction_selection.owner.get_picked_up.rpc()
+			hold_thing.rpc(_interaction_selection.owner.item_bundle)
+		elif GameState.are_bundles_stackable(held_thing, _interaction_selection.owner.item_bundle):
+			_last_picked = Time.get_ticks_msec()
+			_interaction_selection.owner.get_picked_up.rpc()
+			var bundle := GameState.combine_bundles(held_thing, _interaction_selection.owner.item_bundle)
+			hold_thing.rpc(bundle)
+		#_line_of_sight.force_shapecast_update()

src/ingame/player.tscn

@@ -1,10 +1,8 @@
-[gd_scene load_steps=12 format=3 uid="uid://cs8c570bxh6u"]
+[gd_scene load_steps=8 format=3 uid="uid://cs8c570bxh6u"]
 
-[ext_resource type="Script" path="res://src/ingame/player.gd" id="1_isrmf"]
-[ext_resource type="PackedScene" uid="uid://tdsbo3e5ic86" path="res://src/ingame/water_bomb.tscn" id="2_naek4"]
+[ext_resource type="Script" path="res://src/ingame/player.gd" id="1_r8lgj"]
+[ext_resource type="Script" path="res://src/lib/player_character.gd" id="1_sba4x"]
 [ext_resource type="AudioStream" uid="uid://3dlhs18w1fa2" path="res://assets/sfx/boom.wav" id="3_u2hxa"]
-[ext_resource type="Shader" path="res://scenes/interactivity_outline.gdshader" id="4_a2qfj"]
-[ext_resource type="PackedScene" uid="uid://s2a1pry5fw8f" path="res://scenes/water_bomb_model.tscn" id="4_bfvih"]
 
 [sub_resource type="SceneReplicationConfig" id="SceneReplicationConfig_2xotl"]
 properties/0/path = NodePath(".:position")
@@ -25,6 +23,9 @@ properties/4/replication_mode = 2
 properties/5/path = NodePath("ShotSound:playing")
 properties/5/spawn = true
 properties/5/replication_mode = 2
+properties/6/path = NodePath(".:held_thing")
+properties/6/spawn = true
+properties/6/replication_mode = 2
 
 [sub_resource type="CapsuleMesh" id="CapsuleMesh_hi8jw"]
 
@@ -32,24 +33,9 @@ properties/5/replication_mode = 2
 
 [sub_resource type="SphereShape3D" id="SphereShape3D_rsfjy"]
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_nch7m"]
-resource_local_to_scene = true
-render_priority = 0
-shader = ExtResource("4_a2qfj")
-shader_parameter/color = Color(1, 1, 1, 0)
-shader_parameter/size = 1.24
-
-[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_x7r08"]
-resource_local_to_scene = true
-next_pass = SubResource("ShaderMaterial_nch7m")
-albedo_color = Color(0.0936238, 0.825356, 1, 1)
-metallic = 0.8
-roughness = 0.4
-
 [node name="Player" type="CharacterBody3D" node_paths=PackedStringArray("_projectile_holder", "_projectile_point", "_camera_pivot", "_camera", "_line_of_sight", "_shot_sound")]
 collision_layer = 2
-script = ExtResource("1_isrmf")
-_projectile_scene = ExtResource("2_naek4")
+script = ExtResource("1_r8lgj")
 _projectile_holder = NodePath("ProjectileHolder")
 _projectile_point = NodePath("ProjectilePoint")
 _camera_pivot = NodePath("CameraPivot")
@@ -57,11 +43,14 @@ _camera = NodePath("CameraPivot/Camera3D")
 _line_of_sight = NodePath("CameraPivot/LineOfSight")
 _shot_sound = NodePath("ShotSound")
 
+[node name="StairStepper" type="Node" parent="."]
+script = ExtResource("1_sba4x")
+
 [node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
 replication_config = SubResource("SceneReplicationConfig_2xotl")
 
 [node name="ProjectileSpawner" type="MultiplayerSpawner" parent="."]
-_spawnable_scenes = PackedStringArray("res://src/ingame/water_bomb.tscn")
+_spawnable_scenes = PackedStringArray("res://src/ingame/water_bomb.tscn", "res://src/ingame/item_bomb.tscn")
 spawn_path = NodePath("../ProjectileHolder")
 
 [node name="ProjectileHolder" type="Node" parent="."]
@@ -95,10 +84,6 @@ debug_shape_custom_color = Color(0.628721, 0, 0.256939, 1)
 
 [node name="HeldViewmodel" type="Node3D" parent="CameraPivot"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.2, -1)
-visible = false
-
-[node name="Model" parent="CameraPivot/HeldViewmodel" instance=ExtResource("4_bfvih")]
-material_override = SubResource("StandardMaterial3D_x7r08")
 
 [node name="ShotSound" type="AudioStreamPlayer3D" parent="."]
 stream = ExtResource("3_u2hxa")

src/ingame/quad_viewmodel.gd

@@ -0,0 +1,13 @@
+extends Node3D
+
+@export var mesh: MeshInstance3D
+@export var count_label: Label3D
+
+
+func reflect_bundle(p_bundle: Dictionary) -> void:
+	var item = GameState.fetch().INVENTORY_ITEM_DB[p_bundle["item_id"]]
+	mesh.material_override.set("shader_parameter/albedo_texture", item.icon)
+	if item.stackable:
+		count_label.text = str(p_bundle["count"]) + "\n=\n" + str(item.stack_limit)
+	else:
+		count_label.text = str(p_bundle["count"])

src/ingame/quad_viewmodel.tscn

@@ -0,0 +1,40 @@
+[gd_scene load_steps=6 format=3 uid="uid://dxb5f3il2h1ur"]
+
+[ext_resource type="Script" path="res://src/ingame/quad_viewmodel.gd" id="1_l2s4x"]
+[ext_resource type="Texture2D" uid="uid://dgo2frvws2o6f" path="res://assets/coin.png" id="2_k1r4m"]
+[ext_resource type="Shader" path="res://assets/shaders/interactivity_outline2.gdshader" id="2_xpghy"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_5wlqs"]
+resource_local_to_scene = true
+render_priority = 0
+shader = ExtResource("2_xpghy")
+shader_parameter/width = 1.0
+shader_parameter/outline_color = Color(0, 0, 0, 1)
+shader_parameter/albedo_texture = ExtResource("2_k1r4m")
+
+[sub_resource type="QuadMesh" id="QuadMesh_dxt6h"]
+size = Vector2(0.5, 0.5)
+
+[node name="QuadViewmodel" type="Node3D" node_paths=PackedStringArray("mesh", "count_label")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.309578, 0)
+script = ExtResource("1_l2s4x")
+mesh = NodePath("Mesh")
+count_label = NodePath("CountLabel")
+
+[node name="CountLabel" type="Label3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.0502154, 0)
+billboard = 1
+texture_filter = 0
+render_priority = 2
+outline_render_priority = 1
+text = "3
+=
+9"
+font_size = 30
+outline_size = 10
+line_spacing = -22.0
+
+[node name="Mesh" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.0495689, 0)
+material_override = SubResource("ShaderMaterial_5wlqs")
+mesh = SubResource("QuadMesh_dxt6h")

src/ingame/sprout.gd

@@ -2,7 +2,10 @@ extends Node3D
 
 @export var _need_water_drop: Sprite3D
 @export var _production_timer: Timer
-@export var _sprite: Sprite3D
+@export var _mesh: MeshInstance3D
+@export var _area: Area3D
+
+var item_bundle := { "item_id": &"coin_flower", "count": 1 }
 
 var needs_water := true
 var stage: int = 1
@@ -19,19 +22,16 @@ func _on_production_timer_timeout() -> void:
 	_need_water_drop.show()
 
 
-@rpc("authority", "call_local", "reliable")
-func _reflect_texture(p_stage: int) -> void:
-	_sprite.texture = load("res://assets/sprout%s.png" % p_stage)
-
-
 @rpc("authority", "call_local", "reliable")
 func _water_shared(sender_id: int) -> void:
 	if stage >= final_stage:
 		return
 	stage += 1
-	_sprite.texture = load("res://assets/sprout%s.png" % stage)
+	_mesh.material_override.set("shader_parameter/albedo_texture", load("res://assets/sprout%s.png" % stage))
 	if sender_id != 0:
 		GameState.fetch().player_data[sender_id].chain_water_combo(1)
+	if stage == final_stage:
+		_area.collision_layer |= 1 << 4
 
 
 @rpc("any_peer", "call_local", "reliable")
@@ -43,3 +43,21 @@ func water(sender_id: int) -> void:
 		if stage != final_stage:
 			needs_water = false
 			_production_timer.start()
+
+
+@rpc("any_peer", "call_local", "reliable")
+func get_picked_up() -> void:
+	assert(stage == final_stage)
+	stage = 1
+	_mesh.material_override.set("shader_parameter/albedo_texture", load("res://assets/sprout%s.png" % stage))
+	_area.collision_layer ^= 1 << 4
+	needs_water = true
+	_need_water_drop.show()
+
+
+func mark_interactive() -> void:
+	_mesh.material_override.set("shader_parameter/outline_color", Color.WHITE)
+
+
+func mark_non_interactive() -> void:
+	_mesh.material_override.set("shader_parameter/outline_color", Color.BLACK)

src/ingame/sprout.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=6 format=3 uid="uid://bysgtksvovyur"]
+[gd_scene load_steps=9 format=3 uid="uid://bysgtksvovyur"]
 
 [ext_resource type="Script" path="res://src/ingame/sprout.gd" id="1_snma1"]
 [ext_resource type="Texture2D" uid="uid://d35y5ckne72qe" path="res://assets/sprout1.png" id="2_ipgad"]
+[ext_resource type="Shader" path="res://assets/shaders/interactivity_outline2.gdshader" id="2_oa2it"]
 [ext_resource type="Texture2D" uid="uid://cwbl0r1e26eja" path="res://assets/drop.png" id="3_kghdv"]
 
 [sub_resource type="SceneReplicationConfig" id="SceneReplicationConfig_rs2qp"]
@@ -12,27 +13,36 @@ properties/1/path = NodePath("NeedWaterDrop:visible")
 properties/1/spawn = true
 properties/1/replication_mode = 2
 
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_3ul7y"]
+resource_local_to_scene = true
+render_priority = 0
+shader = ExtResource("2_oa2it")
+shader_parameter/width = 1.0
+shader_parameter/outline_color = Color(0, 0, 0, 1)
+shader_parameter/albedo_texture = ExtResource("2_ipgad")
+
+[sub_resource type="QuadMesh" id="QuadMesh_0x06e"]
+size = Vector2(0.5, 1)
+
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_cwbye"]
 radius = 0.3
 height = 0.8
 
-[node name="Sprout" type="Node3D" node_paths=PackedStringArray("_need_water_drop", "_production_timer", "_sprite")]
+[node name="Sprout" type="Node3D" node_paths=PackedStringArray("_need_water_drop", "_production_timer", "_mesh", "_area")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.00401986, -0.00383317, 0.00119042)
 script = ExtResource("1_snma1")
 _need_water_drop = NodePath("NeedWaterDrop")
 _production_timer = NodePath("ProductionTimer")
-_sprite = NodePath("Sprite3D")
+_mesh = NodePath("Mesh")
+_area = NodePath("Area3D")
 
 [node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
 replication_config = SubResource("SceneReplicationConfig_rs2qp")
 
-[node name="Sprite3D" type="Sprite3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.3, 0)
-pixel_size = 0.02
-billboard = 2
-shaded = true
-texture_filter = 2
-texture = ExtResource("2_ipgad")
+[node name="Mesh" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.25, 0)
+material_override = SubResource("ShaderMaterial_3ul7y")
+mesh = SubResource("QuadMesh_0x06e")
 
 [node name="NeedWaterDrop" type="Sprite3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.3, 0)

src/ingame/ui.gd

@@ -1,8 +1,17 @@
 extends CanvasLayer
 
 @export var _combo_timer: Timer
+@export var _combo_label: RichTextLabel
 
 var _id: int
+var _last_combo_time: float
+
+func _process(_delta: float) -> void:
+	var blend := Color(0.2, 0.2, 0.2, (Time.get_ticks_msec() - _last_combo_time) / 3000)
+	var color := Color.GOLD.blend(blend)
+	_combo_label.add_theme_color_override("default_color", color)
+	_combo_label.self_modulate = Color(1, 1, 1,
+		clamp(1 - (Time.get_ticks_msec() - _last_combo_time) / 3000, 0, 1))
 
 
 func _ready() -> void:
@@ -10,14 +19,15 @@ func _ready() -> void:
 	GameState.fetch().player_data[_id].water_combo_update.connect(
 		func(current: int):
 			if current == 0:
-				$Combo.hide()
+				_combo_label.hide()
 			else:
-				$Combo.show()
-				$Combo.text = "+" + str(current) + "!"
+				_combo_label.show()
+				_combo_label.text = "+" + str(current) + "!"
+				_last_combo_time = Time.get_ticks_msec()
 			_combo_timer.start()
 	)
 
 
 func _on_combo_timer_timeout() -> void:
 	GameState.fetch().player_data[_id].reset_water_combo()
-	$Combo.hide()
+	_combo_label.hide()

src/ingame/water_bomb.gd

@@ -1,88 +0,0 @@
-extends Node3D
-
-@export var _splash_small_sound: AudioStreamPlayer3D
-@export var _splash_small_quiet_sound: AudioStreamPlayer3D
-@export var _model: Node3D
-@export var _splash_particles: GPUParticles3D
-@export var _picking_area: Area3D
-@export var body: RigidBody3D
-## no longer exists and shouldn't be considered, but not ready to be freed yet
-@export var is_dead := false
-
-var _in_splash_range := {}
-
-## something to ignore
-var sender_id: int
-var sender_body: PhysicsBody3D
-
-func _ready() -> void:
-	body.process_mode = Node.PROCESS_MODE_DISABLED
-
-
-func _process(delta: float) -> void:
-	if not is_multiplayer_authority():
-		return
-	
-	global_position = body.global_position
-
-
-@rpc("authority", "call_local", "reliable")
-func _disable_body() -> void:
-	# not using synchronizer for this because it ends up enabling processing
-	# on other clients
-	(func() -> void: body.process_mode = Node.PROCESS_MODE_DISABLED).call_deferred()
-
-
-func _on_body_entered(p_body: Node3D) -> void:
-	if p_body == sender_body:
-		return
-
-	if p_body.is_in_group("voids"):
-		queue_free()
-		return
-	
-	for area: Area3D in _in_splash_range:
-		area.get_parent_node_3d().water.rpc_id(1, sender_id)
-	
-	_splash_small_sound.play()
-	_splash_small_quiet_sound.play()
-	_splash_particles.emitting = true
-	
-	is_dead = true
-	_model.hide()
-	_picking_area.collision_layer = 0
-	_disable_body.rpc()
-	
-	await _splash_small_sound.finished
-	if _splash_small_quiet_sound.playing:
-		await _splash_small_quiet_sound.finished
-	queue_free()
-
-
-func _on_splash_area_entered(area: Area3D) -> void:
-	_in_splash_range[area] = true
-
-
-func _on_splash_area_exited(area: Area3D) -> void:
-	_in_splash_range.erase(area)
-
-
-@rpc("authority", "call_local", "reliable")
-func set_global_pos(new: Vector3) -> void:
-	global_position = new
-	body.global_position = new
-	body.reset_physics_interpolation()
-
-
-@rpc("any_peer", "call_local", "reliable")
-func get_picked_up() -> void:
-	if is_multiplayer_authority():
-		queue_free()
-
-
-func mark_interactive() -> void:
-	($Model as CSGSphere3D).material_override.next_pass.set("shader_parameter/color", Color.WHITE)
-
-
-func mark_non_interactive() -> void:
-	($Model as CSGSphere3D).material_override.next_pass.set("shader_parameter/color", Color(1, 1, 1, 0))

src/ingame/water_bomb.tscn

@@ -1,11 +1,9 @@
-[gd_scene load_steps=15 format=3 uid="uid://tdsbo3e5ic86"]
+[gd_scene load_steps=11 format=3 uid="uid://tdsbo3e5ic86"]
 
-[ext_resource type="Script" path="res://src/ingame/water_bomb.gd" id="1_lk5fq"]
-[ext_resource type="PackedScene" uid="uid://s2a1pry5fw8f" path="res://scenes/water_bomb_model.tscn" id="2_0lxuq"]
+[ext_resource type="Script" path="res://src/ingame/bomb.gd" id="1_lk5fq"]
 [ext_resource type="AudioStream" uid="uid://dtjpv2b74g24m" path="res://assets/sfx/splash-small.wav" id="2_0wk8g"]
+[ext_resource type="PackedScene" uid="uid://ba2mut58elwrh" path="res://assets/water-bomb.glb" id="2_v2imr"]
 [ext_resource type="AudioStream" uid="uid://blgrl2wl05feq" path="res://assets/sfx/splash-small-quiet.wav" id="3_hgy7l"]
-[ext_resource type="Shader" path="res://scenes/interactivity_outline.gdshader" id="3_vfl1p"]
-[ext_resource type="Script" path="res://src/lib/item_component.gd" id="5_rpnf2"]
 
 [sub_resource type="SceneReplicationConfig" id="SceneReplicationConfig_0ebrr"]
 properties/0/path = NodePath(".:position")
@@ -26,20 +24,9 @@ properties/4/replication_mode = 2
 properties/5/path = NodePath("SplashParticles:emitting")
 properties/5/spawn = true
 properties/5/replication_mode = 2
-
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_cpgfr"]
-resource_local_to_scene = true
-render_priority = 0
-shader = ExtResource("3_vfl1p")
-shader_parameter/color = Color(1, 1, 1, 0)
-shader_parameter/size = 1.24
-
-[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_dykfn"]
-resource_local_to_scene = true
-next_pass = SubResource("ShaderMaterial_cpgfr")
-albedo_color = Color(0.0936238, 0.825356, 1, 1)
-metallic = 0.8
-roughness = 0.4
+properties/6/path = NodePath(".:rotation")
+properties/6/spawn = true
+properties/6/replication_mode = 1
 
 [sub_resource type="StandardMaterial3D" id="StandardMaterial3D_v7dnr"]
 albedo_color = Color(0, 1, 1, 1)
@@ -70,12 +57,15 @@ _model = NodePath("Model")
 _splash_particles = NodePath("SplashParticles")
 _picking_area = NodePath("PickingArea")
 body = NodePath("RigidBody3D")
+item_id = &"water_bomb"
+item_count = 1
+splash_function = "water"
 
 [node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
 replication_config = SubResource("SceneReplicationConfig_0ebrr")
 
-[node name="Model" parent="." instance=ExtResource("2_0lxuq")]
-material_override = SubResource("StandardMaterial3D_dykfn")
+[node name="Model" parent="." instance=ExtResource("2_v2imr")]
+transform = Transform3D(-0.994881, 0, -0.101056, 0, 1, 0, 0.101056, 0, -0.994881, 0, 0, 0)
 
 [node name="SplashParticles" type="GPUParticles3D" parent="."]
 material_override = SubResource("StandardMaterial3D_v7dnr")
@@ -124,10 +114,6 @@ monitoring = false
 [node name="CollisionShape3D" type="CollisionShape3D" parent="PickingArea"]
 shape = SubResource("SphereShape3D_6c830")
 
-[node name="ItemComponent" type="Node" parent="."]
-script = ExtResource("5_rpnf2")
-id = "water"
-
 [connection signal="body_entered" from="RigidBody3D" to="." method="_on_body_entered"]
 [connection signal="area_entered" from="RigidBody3D/SplashArea" to="." method="_on_splash_area_entered"]
 [connection signal="area_exited" from="RigidBody3D/SplashArea" to="." method="_on_splash_area_exited"]

src/lib/game_state.gd

@@ -1,7 +1,18 @@
-class_name GameState
-extends Resource
+class_name GameState extends Resource
 
+# TODO: build dynamically?
+var INVENTORY_ITEM_DB := {
+	&"meat": load("res://data/meat.tres"),
+	&"water_bomb": load("res://data/water_bomb.tres"),
+	&"coin_flower": load("res://data/coin_flower.tres"),
+	&"coin": load("res://data/coin.tres"),
+}
+
+## keys are multiplayer ID ints, values are PlayerData
 @export var player_data := {}
+## keys are InventoryItem resource IDs (from db),
+## values are { "item": InventoryItem, "count": int }
+@export var inventory := {}
 
 static var _instance := GameState.new()
 
@@ -12,3 +23,25 @@ static func save() -> void:
 
 static func fetch() -> GameState:
 	return _instance
+
+
+static func get_item_count(p_item_id: StringName) -> int:
+	if GameState.fetch().inventory.has(p_item_id):
+		return GameState.fetch().inventory[p_item_id]["count"]
+	else:
+		return 0
+
+
+# TODO: better place for those?
+static func are_bundles_stackable(p_a_bundle: Dictionary, p_b_bundle: Dictionary) -> bool:
+	var item = GameState.fetch().INVENTORY_ITEM_DB[p_a_bundle["item_id"]]
+	return p_a_bundle["item_id"] == p_b_bundle["item_id"] and \
+		item.stackable and p_a_bundle["count"] + p_b_bundle["count"] <= item.stack_limit
+
+
+static func combine_bundles(p_a_bundle: Dictionary, p_b_bundle: Dictionary) -> Dictionary:
+	assert(are_bundles_stackable(p_a_bundle, p_b_bundle))
+	return {
+		"item_id": p_a_bundle["item_id"],
+		"count": p_a_bundle["count"] + p_b_bundle["count"],
+	}

src/lib/inventory_item.gd

@@ -0,0 +1,12 @@
+class_name InventoryItem extends Resource
+
+@export var icon: Texture2D = preload("res://icon.svg")
+@export var model: PackedScene
+@export var bomb: PackedScene = preload("res://src/ingame/item_bomb.tscn")
+@export var name := "NAME"
+@export var id := &"ID"
+
+@export var stackable := false
+@export var stack_limit := 8
+
+@export var sells_for := 0

src/lib/item_component.gd

@@ -1,17 +0,0 @@
-class_name ItemComponent
-extends Node
-
-## Base identity, properties are defined in item db.
-@export var id: String
-
-
-func mark_interactive() -> void:
-	var parent := get_parent()
-	if parent.has_method("mark_interactive"):
-		parent.mark_interactive()
-
-
-func mark_non_interactive(delta: float) -> void:
-	var parent := get_parent()
-	if parent.has_method("mark_non_interactive"):
-		parent.mark_non_interactive()

src/lib/player_character.gd

@@ -0,0 +1,156 @@
+class_name StairStepper extends Node
+# MIT License
+#
+# Copyright (c) 2024 JKWall
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+
+## Credits:
+# Special thanks to Majikayo Games for original solution to stair_step_down!
+# (https://youtu.be/-WjM1uksPIk)
+#
+# Special thanks to Myria666 for their paper on Quake movement mechanics (used for stair_step_up)!
+# (https://github.com/myria666/qMovementDoc)
+#
+# Special thanks to Andicraft for their help with implementation stair_step_up!
+# (https://github.com/Andicraft)
+
+## Notes:
+# 0. All shape colliders are supported. Although, I would recommend Capsule colliders for enemies
+#		as it works better with the Navigation Meshes. Its up to you what shape you want to use
+#		for players.
+#
+# 1. To adjust the step-up/down height, just change the MAX_STEP_UP/MAX_STEP_DOWN values below.
+#
+# 2. This uses Jolt Physics as the default Godot Physics has a few bugs:
+#	1: Small gaps that you should be able to fit through both ways will block you in Godot Physics.
+#		You can see this demonstrated with the floating boxes in front of the big stairs.
+#	2: Walking into some objects may push the player downward by a small amount which causes
+#		jittering and causes the floor to be detected as a step.
+#	TLDR: This still works with default Godot Physics, although it feels a lot better in Jolt Physics.
+
+@export var MAX_STEP_UP := 0.5			# Maximum height in meters the player can step up.
+@export var MAX_STEP_DOWN := -0.5		# Maximum height in meters the player can step down.
+
+var was_grounded: bool = true
+var is_grounded: bool = true
+
+
+func _physics_process(_delta: float) -> void:
+	was_grounded = is_grounded
+	is_grounded = owner.is_on_floor()
+
+
+# Function: Handle walking down stairs
+func stair_step_down():
+	if owner.is_on_floor():
+		return
+
+	# If we're falling from a step
+	if owner.velocity.y <= 0 and was_grounded:
+		# Initialize body test variables
+		var body_test_result = PhysicsTestMotionResult3D.new()
+		var body_test_params = PhysicsTestMotionParameters3D.new()
+
+		body_test_params.from = owner.global_transform			## We get the player's current global_transform
+		body_test_params.motion = Vector3(0, MAX_STEP_DOWN, 0)	## We project the player downward
+
+		if PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result):
+			# Enters if a collision is detected by body_test_motion
+			# Get distance to step and move player downward by that much
+			owner.position.y += body_test_result.get_travel().y
+			owner.apply_floor_snap()
+			is_grounded = true
+
+
+# Function: Handle walking up stairs
+func stair_step_up(wish_dir: Vector3):
+	if wish_dir == Vector3.ZERO:
+		return
+
+	# 0. Initialize testing variables
+	var body_test_params = PhysicsTestMotionParameters3D.new()
+	var body_test_result = PhysicsTestMotionResult3D.new()
+
+	var test_transform = owner.global_transform				## Storing current global_transform for testing
+	var distance = wish_dir * 0.1						## Distance forward we want to check
+	body_test_params.from = owner.global_transform		## Self as origin point
+	body_test_params.motion = distance					## Go forward by current distance
+
+	# Pre-check: Are we colliding?
+	if !PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result):
+		## If we don't collide, return
+		return
+
+	# 1. Move test_transform to collision location
+	var remainder = body_test_result.get_remainder()							## Get remainder from collision
+	test_transform = test_transform.translated(body_test_result.get_travel())	## Move test_transform by distance traveled before collision
+
+	# 2. Move test_transform up to ceiling (if any)
+	var step_up = MAX_STEP_UP * Vector3.UP
+	body_test_params.from = test_transform
+	body_test_params.motion = step_up
+	PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result)
+	test_transform = test_transform.translated(body_test_result.get_travel())
+
+	# 3. Move test_transform forward by remaining distance
+	body_test_params.from = test_transform
+	body_test_params.motion = remainder
+	PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result)
+	test_transform = test_transform.translated(body_test_result.get_travel())
+
+	# 3.5 Project remaining along wall normal (if any)
+	## So you can walk into wall and up a step
+	if body_test_result.get_collision_count() != 0:
+		remainder = body_test_result.get_remainder().length()
+
+		### Uh, there may be a better way to calculate this in Godot.
+		var wall_normal = body_test_result.get_collision_normal()
+		var dot_div_mag = wish_dir.dot(wall_normal) / (wall_normal * wall_normal).length()
+		var projected_vector = (wish_dir - dot_div_mag * wall_normal).normalized()
+
+		body_test_params.from = test_transform
+		body_test_params.motion = remainder * projected_vector
+		PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result)
+		test_transform = test_transform.translated(body_test_result.get_travel())
+
+	# 4. Move test_transform down onto step
+	body_test_params.from = test_transform
+	body_test_params.motion = MAX_STEP_UP * -Vector3.UP
+
+	# Return if no collision
+	if !PhysicsServer3D.body_test_motion(owner.get_rid(), body_test_params, body_test_result):
+		return
+
+	test_transform = test_transform.translated(body_test_result.get_travel())
+
+	# 5. Check floor normal for un-walkable slope
+	var surface_normal = body_test_result.get_collision_normal()
+	var temp_floor_max_angle = owner.floor_max_angle + deg_to_rad(20)
+	if (snappedf(surface_normal.angle_to(Vector3.UP), 0.001) > temp_floor_max_angle):
+		return
+
+
+	# 6. Move player up
+	var global_pos = owner.global_position
+	#var step_up_dist = test_transform.origin.y - global_pos.y
+
+	global_pos.y = test_transform.origin.y
+	owner.global_position = global_pos

src/lib/player_data.gd

@@ -5,6 +5,7 @@ extends Resource
 
 ## How many plants are watered in a time window.
 var _water_combo: int
+@warning_ignore("unused_signal")
 signal water_combo_update(current: int)
 
 

src/main/main.gd

@@ -35,6 +35,9 @@ func _on_player_joined(id: int) -> void:
 		_register_player.rpc_id(id, username)
 	
 	if _game_started:
+		for item_id in GameState.fetch().inventory:
+			set_inventory_item_count.rpc_id(id, item_id, GameState.fetch().inventory[item_id].count)
+		
 		_start_game.rpc_id(id)
 
 
@@ -86,7 +89,7 @@ func _add_chat_message(username: String, text: String) -> void:
 	
 	# keep chat scrolled to the bottom
 	await _chat_history_scroll.get_v_scroll_bar().changed
-	_chat_history_scroll.scroll_vertical = _chat_history_scroll.get_v_scroll_bar().max_value
+	_chat_history_scroll.scroll_vertical = int(_chat_history_scroll.get_v_scroll_bar().max_value)
 
 
 @rpc("authority", "call_local", "reliable")
@@ -173,3 +176,39 @@ func _on_chat_message_submitted(text := "") -> void:
 	
 	_submit_chat_message.rpc_id(1, _chat_input.text)
 	_chat_input.clear()
+
+
+## Make sure it exists and all.
+func prepate_inventory_idem(item_id: StringName) -> void:
+	if not GameState.fetch().inventory.has(item_id):
+		GameState.fetch().inventory[item_id] = {
+			"item": GameState.fetch().INVENTORY_ITEM_DB[item_id],
+			"count": 0,
+		}
+
+
+# TODO: made any_peer to have access from projectiles
+@rpc("any_peer", "call_local", "reliable")
+func add_inventory_item(item_id: StringName, amount: int) -> void:
+	prepate_inventory_idem(item_id)
+	GameState.fetch().inventory[item_id]["count"] += amount
+
+
+@rpc("any_peer", "call_local", "reliable")
+func remove_inventory_item(item_id: StringName, amount: int) -> void:
+	assert(GameState.fetch().inventory.has(item_id))
+	
+	GameState.fetch().inventory[item_id]["count"] -= amount
+	assert(GameState.fetch().inventory[item_id]["count"] >= 0)
+	
+	if GameState.fetch().inventory[item_id]["count"] == 0:
+		GameState.fetch().inventory.erase(item_id)
+
+
+@rpc("any_peer", "call_local", "reliable")
+func set_inventory_item_count(item_id: StringName, value: int) -> void:
+	prepate_inventory_idem(item_id)
+	GameState.fetch().inventory[item_id]["count"] = value
+	
+	if GameState.fetch().inventory[item_id]["count"] == 0:
+		GameState.fetch().inventory.erase(item_id)