item selection

scenes/interactivity_outline.gdshader

@@ -0,0 +1,14 @@
+shader_type spatial;
+render_mode blend_mix, cull_front, unshaded;
+
+uniform vec4 color : source_color = vec4(1,0,0,1);
+uniform float size : hint_range(1.0, 1.5, 0.01) = 1.05;
+
+void vertex() {
+	VERTEX *= size;
+}
+
+void fragment() {
+	ALBEDO = color.rgb;
+	ALPHA = color.a;
+}

scenes/water_bomb_model.tscn

@@ -1,6 +1,17 @@
-[gd_scene load_steps=2 format=3 uid="uid://s2a1pry5fw8f"]
+[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

src/ingame/player.gd

@@ -21,6 +21,8 @@ var _max_speed := 12
 var _mouse_sensitivity := 0.008  # radians/pixel
 
 var _projectile_speed := 12.0
+## Could be only one thing at a time to consider.
+var _interaction_selection: Node3D
 
 var controls_disabled := false
 var held_thing: String
@@ -52,6 +54,18 @@ func _process(_delta: float) -> void:
 
 
 func _physics_process(delta: float) -> void:
+	## Process interactivity selection.
+	var collider: Object = null
+	if _line_of_sight.is_colliding():
+		collider = _line_of_sight.get_collider(0)
+	if collider != _interaction_selection:
+		if _interaction_selection != null:
+			_interaction_selection.get_parent().mark_non_interactive()
+		if collider != null:
+			collider.get_parent().mark_interactive()
+	_interaction_selection = collider
+
+
 	# Add the gravity.
 	if not is_on_floor():
 		velocity += get_gravity() * delta
@@ -96,12 +110,8 @@ func _unhandled_input(event: InputEvent) -> void:
 		return
 	
 	if event.is_action_pressed("pick") and held_thing == "":
-		if _line_of_sight.is_colliding():
-			if id != 1:
-				print("test")
-			# TODO: bad
-			var picked = _line_of_sight.get_collider(0).get_parent()
-			picked.get_picked_up.rpc()
+		if _interaction_selection != null:
+			_interaction_selection.get_parent().get_picked_up.rpc()
 			hold_thing.rpc()
 	
 	if event.is_action_pressed("fire") and held_thing != "":

src/ingame/water_bomb.gd

@@ -77,3 +77,11 @@ func set_global_pos(new: Vector3) -> void:
 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

@@ -1,9 +1,11 @@
-[gd_scene load_steps=11 format=3 uid="uid://tdsbo3e5ic86"]
+[gd_scene load_steps=15 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="AudioStream" uid="uid://dtjpv2b74g24m" path="res://assets/sfx/splash-small.wav" id="2_0wk8g"]
 [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")
@@ -25,6 +27,20 @@ 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
+
 [sub_resource type="StandardMaterial3D" id="StandardMaterial3D_v7dnr"]
 albedo_color = Color(0, 1, 1, 1)
 roughness = 0.2
@@ -59,6 +75,7 @@ body = NodePath("RigidBody3D")
 replication_config = SubResource("SceneReplicationConfig_0ebrr")
 
 [node name="Model" parent="." instance=ExtResource("2_0lxuq")]
+material_override = SubResource("StandardMaterial3D_dykfn")
 
 [node name="SplashParticles" type="GPUParticles3D" parent="."]
 material_override = SubResource("StandardMaterial3D_v7dnr")
@@ -107,6 +124,10 @@ 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/item_component.gd

@@ -0,0 +1,17 @@
+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()