3D tutorial with brownian-ish motion enemies

3d-tutorial/3d_squash_the_creeps_starter/main.gd

@@ -0,0 +1,15 @@
+extends Node
+
+@export var mob_scene: PackedScene
+
+
+func _on_mob_timer_timeout() -> void:
+	var mob = mob_scene.instantiate()
+
+	var mob_spawn_location = get_node("SpawnPath/SpawnLocation")
+	mob_spawn_location.progress_ratio = randf()
+
+	var player_position = $Player.position
+	mob.initialize(mob_spawn_location.position, player_position)
+
+	add_child(mob)

3d-tutorial/3d_squash_the_creeps_starter/main.gd.uid

@@ -0,0 +1 @@
+uid://cfb7xo35cn5fo

3d-tutorial/3d_squash_the_creeps_starter/main.tscn

@@ -1,6 +1,8 @@
-[gd_scene load_steps=4 format=3 uid="uid://2wap0283yk0r"]
+[gd_scene load_steps=9 format=3 uid="uid://2wap0283yk0r"]
 
+[ext_resource type="Script" uid="uid://cfb7xo35cn5fo" path="res://main.gd" id="1_0xm2m"]
 [ext_resource type="PackedScene" uid="uid://ceuu150fmggvr" path="res://player.tscn" id="1_ig7tw"]
+[ext_resource type="PackedScene" uid="uid://defdm2qdva75q" path="res://mob.tscn" id="2_h2yge"]
 
 [sub_resource type="BoxShape3D" id="BoxShape3D_7dm0k"]
 size = Vector3(60, 2, 60)
@@ -8,10 +10,28 @@ size = Vector3(60, 2, 60)
 [sub_resource type="BoxMesh" id="BoxMesh_ig7tw"]
 size = Vector3(60, 2, 60)
 
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_ig7tw"]
+albedo_color = Color(0.48985153, 0.33837724, 0.8704828, 1)
+
+[sub_resource type="CylinderMesh" id="CylinderMesh_ig7tw"]
+material = SubResource("StandardMaterial3D_ig7tw")
+
+[sub_resource type="Curve3D" id="Curve3D_ig7tw"]
+closed = true
+_data = {
+"points": PackedVector3Array(0, 0, 0, 0, 0, 0, -13.082657, 0, 14.897789, 0, 0, 0, 0, 0, 0, 14.178589, 0, 15.103276, 0, 0, 0, 0, 0, 0, 14.178589, 0, -15.240269, 0, 0, 0, 0, 0, 0, -13.01416, 0, -15.171773),
+"tilts": PackedFloat32Array(0, 0, 0, 0)
+}
+point_count = 4
+
 [node name="Main" type="Node"]
+script = ExtResource("1_0xm2m")
+mob_scene = ExtResource("2_h2yge")
 
 [node name="Ground" type="StaticBody3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -1, 0)
+collision_layer = 4
+collision_mask = 0
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="Ground"]
 shape = SubResource("BoxShape3D_7dm0k")
@@ -20,7 +40,7 @@ shape = SubResource("BoxShape3D_7dm0k")
 mesh = SubResource("BoxMesh_ig7tw")
 
 [node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, -0.50000006, 0.8660254, 0, -0.8660254, -0.50000006, 0, 15, 0)
+transform = Transform3D(1, 0, 0, 0, 0.8660254, 0.5, 0, -0.5, 0.8660254, 0, 15, 5)
 shadow_enabled = true
 
 [node name="Player" parent="." instance=ExtResource("1_ig7tw")]
@@ -32,3 +52,32 @@ transform = Transform3D(1, 0, 0, 0, 0.70710677, 0.70710677, 0, -0.70710677, 0.70
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 19)
 projection = 1
 size = 19.0
+
+[node name="Cyllinders" type="Node3D" parent="."]
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="Cyllinders"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -13, 0, -15)
+mesh = SubResource("CylinderMesh_ig7tw")
+
+[node name="MeshInstance3D2" type="MeshInstance3D" parent="Cyllinders"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -13, 0, 15)
+mesh = SubResource("CylinderMesh_ig7tw")
+
+[node name="MeshInstance3D3" type="MeshInstance3D" parent="Cyllinders"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 14, 0, -15)
+mesh = SubResource("CylinderMesh_ig7tw")
+
+[node name="MeshInstance3D4" type="MeshInstance3D" parent="Cyllinders"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 14, 0, 15)
+mesh = SubResource("CylinderMesh_ig7tw")
+
+[node name="SpawnPath" type="Path3D" parent="."]
+curve = SubResource("Curve3D_ig7tw")
+
+[node name="SpawnLocation" type="PathFollow3D" parent="SpawnPath"]
+transform = Transform3D(-0.007537449, 0, -0.9999705, 0, 1, 0, 0.9999705, 0, -0.007537449, -13.082657, 0, 14.897789)
+
+[node name="MobTimer" type="Timer" parent="."]
+autostart = true
+
+[connection signal="timeout" from="MobTimer" to="." method="_on_mob_timer_timeout"]

3d-tutorial/3d_squash_the_creeps_starter/mob.gd

@@ -0,0 +1,40 @@
+extends CharacterBody3D
+
+signal squashed
+
+@export var min_speed = 10
+@export var max_speed = 18
+
+# In code timer for brownian motion
+var T: float = 0.5
+var Tinit: float = 1.0
+var dt: float = 0.05
+var t: float = 0.0
+
+func _physics_process(_delta):
+	if t > T and Tinit < 0:
+		t = 0
+		set_new_velocity()
+	t += dt
+	Tinit -= dt
+	 
+	move_and_slide()
+
+func initialize(start_position, player_position):
+	look_at_from_position(start_position, player_position, Vector3.UP)
+	
+	set_new_velocity()
+
+func set_new_velocity() -> void:
+	rotate_y(randf_range(-PI / 4, PI / 4))
+	var random_speed = randi_range(min_speed, max_speed)
+	velocity = Vector3.FORWARD * random_speed
+	velocity = velocity.rotated(Vector3.UP, rotation.y)
+
+func _on_visible_on_screen_notifier_3d_screen_exited() -> void:
+	queue_free()
+
+
+func squash():
+	squashed.emit()
+	queue_free()

3d-tutorial/3d_squash_the_creeps_starter/mob.gd.uid

@@ -0,0 +1 @@
+uid://c5wp01kn08qxe

3d-tutorial/3d_squash_the_creeps_starter/mob.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=4 format=3 uid="uid://defdm2qdva75q"]
+
+[ext_resource type="PackedScene" uid="uid://bicorb7we351t" path="res://art/mob.glb" id="1_dy6sc"]
+[ext_resource type="Script" uid="uid://c5wp01kn08qxe" path="res://mob.gd" id="1_nokgg"]
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_nokgg"]
+size = Vector3(1.9155884, 0.7798462, 1.6226807)
+
+[node name="Mob" type="CharacterBody3D" groups=["mob"]]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.22412324, 0)
+collision_layer = 2
+collision_mask = 0
+script = ExtResource("1_nokgg")
+
+[node name="Pivot" type="Node3D" parent="."]
+
+[node name="Character" parent="Pivot" instance=ExtResource("1_dy6sc")]
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.020843506, 0.4449278, 0.06854248)
+shape = SubResource("BoxShape3D_nokgg")
+
+[node name="VisibleOnScreenNotifier3D" type="VisibleOnScreenNotifier3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.007541895, 0.34551716, 0.3237151)
+aabb = AABB(-1.1488216, -0.65816104, -1.7166415, 2.2976432, 1.2323378, 3.433283)
+
+[connection signal="screen_exited" from="VisibleOnScreenNotifier3D" to="." method="_on_visible_on_screen_notifier_3d_screen_exited"]

3d-tutorial/3d_squash_the_creeps_starter/player.gd

@@ -2,7 +2,8 @@ extends CharacterBody3D
 
 @export var speed = 14
 @export var fall_acc = 75
-@export var jump_impulse = 40
+@export var jump_impulse = 50
+@export var bounce_impulse = 40
 
 var target_vel = Vector3.ZERO
 
@@ -35,5 +36,22 @@ func _physics_process(delta: float) -> void:
 	if is_on_floor() and Input.is_action_just_pressed("jump"):
 		target_vel.y = jump_impulse
 		
+	# Iterate through all collisions that occurred this frame
+	for index in range(get_slide_collision_count()):
+		var collision = get_slide_collision(index)
+
+		# Avoid calling collision again after deleting
+		if collision.get_collider() == null:
+			continue
+
+		if collision.get_collider().is_in_group("mob"):
+			var mob = collision.get_collider()
+			# hitting it from above.
+			if Vector3.UP.dot(collision.get_normal()) > 0.1:
+				mob.squash()
+				if !is_on_floor():  # TODO: This does not seem to work here
+					target_vel.y = bounce_impulse
+				break
+		
 	velocity = target_vel
 	move_and_slide()

3d-tutorial/3d_squash_the_creeps_starter/player.tscn

@@ -7,11 +7,14 @@
 radius = 1.0
 
 [node name="Player" type="CharacterBody3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.3503281, 0)
+collision_mask = 6
 script = ExtResource("1_onrkg")
 
 [node name="Pivot" type="Node3D" parent="."]
 
 [node name="Character" parent="Pivot" instance=ExtResource("1_4flbx")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.1, 0)
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)

3d-tutorial/3d_squash_the_creeps_starter/project.godot

@@ -12,9 +12,15 @@ config_version=5
 
 config/name="Squash the Creeps (3D)"
 config/description="In this game, your goal is to chase and kick out the creeps!"
+run/main_scene="uid://2wap0283yk0r"
 config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
+[display]
+
+window/size/viewport_width=720
+window/size/viewport_height=540
+
 [filesystem]
 
 import/blender/enabled=false
@@ -51,6 +57,12 @@ jump={
 ]
 }
 
+[layer_names]
+
+3d_physics/layer_1="players"
+3d_physics/layer_2="enemies"
+3d_physics/layer_3="world"
+
 [rendering]
 
 anti_aliasing/quality/msaa_3d=2