Added modular coin machine and power station. Updated Player code to handle inventory.

Player.gd

@@ -1,14 +0,0 @@
-extends KinematicBody
-
-const SPEED = 3.0
-
-
-# Called when the node enters the scene tree for the first time.
-func _ready():
-	pass # Replace with function body.
-
-func _physics_process(delta):
-	var input = Vector3(Input.get_axis("left", "right"), 0.0, Input.get_axis("up", "down"))
-	var motion = Plane.PLANE_XZ.project(get_viewport().get_camera().global_transform.basis.xform(input)).normalized() * SPEED
-
-	move_and_slide(motion)

project.godot

@@ -11,7 +11,7 @@ config_version=4
 [application]
 
 config/name="project-dung"
-run/main_scene="res://Prototype.tscn"
+run/main_scene="res://scenes/Prototype.tscn"
 config/icon="res://icon.png"
 
 [display]

scenes/Prototype.tscn

@@ -0,0 +1,10 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://scenes/player.tscn" type="PackedScene" id=1]
+[ext_resource path="res://scenes/moon.tscn" type="PackedScene" id=2]
+
+[node name="Prototype" type="Spatial"]
+
+[node name="moon" parent="." instance=ExtResource( 2 )]
+
+[node name="Player" parent="." instance=ExtResource( 1 )]

scenes/coin_machine.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://scripts/coin_machine.gd" type="Script" id=1]
+
+[sub_resource type="SphereShape" id=1]
+
+[node name="coin_machine" type="Area"]
+script = ExtResource( 1 )
+
+[node name="CollisionShape" type="CollisionShape" parent="."]
+transform = Transform( 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0 )
+shape = SubResource( 1 )

scenes/dev-akshay.tscn

@@ -0,0 +1,15 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://scenes/player.tscn" type="PackedScene" id=1]
+[ext_resource path="res://scenes/moon.tscn" type="PackedScene" id=2]
+[ext_resource path="res://scenes/power_station.tscn" type="PackedScene" id=3]
+
+[node name="dev_akshay" type="Spatial"]
+
+[node name="moon" parent="." instance=ExtResource( 2 )]
+
+[node name="power_station" parent="." instance=ExtResource( 3 )]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0.00300264, 1.00556, -4.18269 )
+time_to_generate = 5.0
+
+[node name="Player" parent="." instance=ExtResource( 1 )]

scenes/player.tscn

@@ -1,7 +1,6 @@
 [gd_scene load_steps=5 format=2]
 
-[ext_resource path="res://Player.gd" type="Script" id=1]
+[ext_resource path="res://scripts/Player.gd" type="Script" id=1]
-[ext_resource path="res://moon.tscn" type="PackedScene" id=2]
 
 [sub_resource type="CapsuleMesh" id=1]
 radius = 0.2
@@ -11,22 +10,25 @@ mid_height = 0.85
 radius = 0.210213
 height = 0.85525
 
-[node name="Prototype" type="Spatial"]
+[sub_resource type="SphereShape" id=3]
 
-[node name="moon" parent="." instance=ExtResource( 2 )]
+[node name="Player" type="KinematicBody"]
-
-[node name="Player" type="KinematicBody" parent="."]
 script = ExtResource( 1 )
 
-[node name="MeshInstance" type="MeshInstance" parent="Player"]
+[node name="MeshInstance" type="MeshInstance" parent="."]
 transform = Transform( 0.994286, 0, 0, 0, -4.34616e-08, -0.994286, 0, 0.994286, -4.34616e-08, 0, 0.666587, 0 )
 mesh = SubResource( 1 )
 skeleton = NodePath("../..")
 
-[node name="CollisionShape" type="CollisionShape" parent="Player"]
+[node name="CollisionShape" type="CollisionShape" parent="."]
 transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 0, 0.641703, 0 )
 shape = SubResource( 2 )
 
-[node name="Camera" type="Camera" parent="Player"]
+[node name="Camera" type="Camera" parent="."]
 transform = Transform( 1, 0, 0, 0, 0.5, 0.866025, 0, -0.866025, 0.5, 0, 5.44166, 3.39746 )
 fov = 50.0
+
+[node name="TriggerVolume" type="Area" parent="."]
+
+[node name="CollisionShape" type="CollisionShape" parent="TriggerVolume"]
+shape = SubResource( 3 )

scenes/power_station.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://scripts/power_station.gd" type="Script" id=1]
+[ext_resource path="res://scenes/coin_machine.tscn" type="PackedScene" id=2]
+
+[sub_resource type="CubeMesh" id=1]
+
+[node name="power_station" type="Spatial"]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0 )
+script = ExtResource( 1 )
+time_to_generate = 1.0
+
+[node name="coin_machine" parent="." instance=ExtResource( 2 )]
+transform = Transform( 4, 0, 0, 0, 2, 0, 0, 0, 4, 0, 0, 0 )
+coins_required = 0
+
+[node name="MeshInstance" type="MeshInstance" parent="."]
+mesh = SubResource( 1 )
+
+[connection signal="coin_requirement_met" from="coin_machine" to="." method="_on_coin_machine_coin_requirement_met"]

scripts/Player.gd

@@ -0,0 +1,63 @@
+extends KinematicBody
+
+const SPEED = 3.0
+
+export var inventory = { "ore" : 0 }
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+func _physics_process(delta):
+	var input = Vector3(Input.get_axis("left", "right"), 0.0, Input.get_axis("up", "down"))
+	var motion = Plane.PLANE_XZ.project(get_viewport().get_camera().global_transform.basis.xform(input)).normalized() * SPEED
+
+	move_and_slide(motion)
+
+func can_afford(item_name, item_amount):
+	assert(item_amount > 0)
+	var current_amount : int = 0
+	if(inventory.has(item_name)):
+		current_amount = inventory[item_name]
+	return current_amount >= item_amount
+	
+func modify_inventory(item_name, item_amount):
+	if item_amount == 0:
+		return true
+		
+	var is_op_valid : bool = true
+	
+	# Note(asr): check if you can afford the item if we are removing
+	# for item grants op is always valid
+	if item_amount < 0:
+		is_op_valid = can_afford(item_name, abs(item_amount))
+		
+	if not is_op_valid:
+		return false
+	
+	var current_amount : int = 0
+	if inventory.has(item_name):
+		current_amount = inventory[item_name]
+	# Note(asr): clamp to 0. can't have negative items
+	var new_amount : int = max(current_amount + item_amount, 0)
+	inventory[item_name] = new_amount
+	print("inventory updated: ", item_name, " : ", new_amount)
+	return true
+
+func _unhandled_input(event):
+	if event.is_action_pressed("action"):
+		for area in $TriggerVolume.get_overlapping_areas():
+			if try_trigger_interact(area):
+				break
+		
+func try_trigger_interact(area):
+	var owner = area
+	if area.has_meta("owner"):
+		owner = area.get_meta("owner")
+	
+	if not owner.has_method("on_player_interact"):
+		return false
+		
+	owner.on_player_interact(self)
+	print("player interacted with ", owner)
+	return true

scripts/coin_machine.gd

@@ -0,0 +1,16 @@
+extends Area
+
+export var coins_required : int = 1
+
+signal coin_requirement_met;
+
+func _ready():
+	assert(coins_required >= 0)
+	set_meta("owner", self)
+
+func on_player_interact(player):
+	assert(player.has_method("modify_inventory"))
+	if not player.modify_inventory("coins", -coins_required):
+		return
+		
+	emit_signal("coin_requirement_met", player)

scripts/power_station.gd

@@ -0,0 +1,31 @@
+extends Spatial
+
+export var max_charge_capacity : int = 1
+export var time_to_generate : float = 120
+
+var current_holding : int = 0
+var current_timer : float = 0
+
+func _ready():
+	pass # Replace with function body.
+
+func _process(delta):
+	current_timer += delta
+	if current_timer >= time_to_generate:
+		generate_charge()
+		current_timer = 0
+
+func generate_charge():
+	if current_holding >= max_charge_capacity:
+		return
+	current_holding += 1
+	print("power station: charge generated")
+
+func collect_charges_from_station():
+	var charges_to_return : int = current_holding
+	current_holding = 0
+	return charges_to_return
+
+func _on_coin_machine_coin_requirement_met(player):
+	assert(player.has_method("modify_inventory"))
+	player.modify_inventory("coins", collect_charges_from_station())