make it easier to tell where the ball is going

elements/gravity.tscn

@@ -0,0 +1,164 @@
+[gd_scene load_steps=7 format=3 uid="uid://dw0xl8644x166"]
+
+[ext_resource type="Texture2D" uid="uid://ctjugvy1v3y6b" path="res://graphics/arrow.svg" id="1_4mbho"]
+
+[sub_resource type="GDScript" id="GDScript_wuka5"]
+script/source = "extends HSlider
+
+# Maybe change it so it's not a slider, but just a value that... depends on the mouse position?
+# Or a value that's only high if the user is pressing shift, à la catch the beat
+
+func _on_value_changed(value: float) -> void:
+	PhysicsServer3D.area_set_param(get_viewport().find_world_3d().space, PhysicsServer3D.AREA_PARAM_GRAVITY, value)
+
+func _on_focus_entered() -> void:
+	release_focus()
+"
+
+[sub_resource type="GDScript" id="GDScript_my602"]
+script/source = "extends TextureRect
+
+func _ready() -> void:
+	# set the indicator to be fully transparent when it first spawns
+	self.self_modulate = Color(1, 1, 1, 0)
+
+func _input(ev: InputEvent) -> void:
+	if ev is InputEventKey and ev.is_pressed():
+		var k = ev.keycode
+		if k == KEY_UP or k == KEY_RIGHT or k == KEY_LEFT or k == KEY_DOWN:
+			var direction = Vector3()
+			if k == KEY_UP:
+				direction = Vector3.UP
+				self.rotation_degrees = -90
+			elif k == KEY_LEFT:
+				direction = Vector3.LEFT
+				self.rotation_degrees = -180
+			elif k == KEY_RIGHT:
+				direction = Vector3.RIGHT
+				self.rotation_degrees = 0
+			elif k == KEY_DOWN:
+				direction = Vector3.DOWN
+				self.rotation_degrees = 90
+			PhysicsServer3D.area_set_param(
+				get_viewport().find_world_3d().space,
+				PhysicsServer3D.AREA_PARAM_GRAVITY_VECTOR,
+				direction
+			)
+			
+			if $AnimationPlayer.is_playing():
+				$AnimationPlayer.stop()
+			$AnimationPlayer.play(\"grow_fadeout\")
+"
+
+[sub_resource type="Animation" id="Animation_6rwl4"]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:scale")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Vector2(0.3, 0.3)]
+}
+tracks/1/type = "value"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath(".:self_modulate")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Color(1, 1, 1, 0.501961)]
+}
+
+[sub_resource type="Animation" id="Animation_ll6d0"]
+resource_name = "grow_fadeout"
+length = 0.2
+step = 0.2
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:scale")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.2),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Vector2(0.3, 0.3), Vector2(0.8, 0.8)]
+}
+tracks/1/type = "value"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath(".:self_modulate")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"times": PackedFloat32Array(0, 0.142857),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Color(1, 1, 1, 0.501961), Color(1, 1, 1, 0)]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_0w0ne"]
+_data = {
+"RESET": SubResource("Animation_6rwl4"),
+"grow_fadeout": SubResource("Animation_ll6d0")
+}
+
+[node name="Gravity" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Strength" type="HSlider" parent="."]
+layout_mode = 1
+anchors_preset = -1
+anchor_left = 0.2
+anchor_top = 0.9
+anchor_right = 0.8
+anchor_bottom = 1.0
+offset_right = -0.00012207
+grow_horizontal = 2
+grow_vertical = 0
+size_flags_horizontal = 4
+size_flags_vertical = 1
+min_value = 10.0
+max_value = 40.0
+step = 0.2
+value = 10.0
+script = SubResource("GDScript_wuka5")
+metadata/_edit_use_anchors_ = true
+
+[node name="Direction" type="TextureRect" parent="."]
+self_modulate = Color(1, 1, 1, 0.501961)
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+scale = Vector2(0.3, 0.3)
+pivot_offset = Vector2(576, 324)
+texture = ExtResource("1_4mbho")
+expand_mode = 3
+stretch_mode = 5
+script = SubResource("GDScript_my602")
+metadata/_edit_use_anchors_ = true
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="Direction"]
+libraries = {
+"": SubResource("AnimationLibrary_0w0ne")
+}
+
+[connection signal="focus_entered" from="Strength" to="Strength" method="_on_focus_entered"]
+[connection signal="value_changed" from="Strength" to="Strength" method="_on_value_changed"]

elements/player.tscn

@@ -0,0 +1,35 @@
+[gd_scene load_steps=4 format=3 uid="uid://cnnvwotv33u1b"]
+
+[ext_resource type="PackedScene" uid="uid://dw0xl8644x166" path="res://elements/gravity.tscn" id="1_h0h2o"]
+[ext_resource type="PackedScene" uid="uid://df5m716pd6mej" path="res://elements/sphere.tscn" id="2_ophnk"]
+
+[sub_resource type="GDScript" id="GDScript_bnqcw"]
+script/source = "extends Node
+
+func _process(delta: float) -> void:
+	## Keep the ball at the center of the camera, at a distance
+	$Camera.position = $Sphere.position + Vector3(0, 0, 20)
+	
+	## Angle of the camera, so the player can see where the ball is going
+	var velocity: Vector3 = $Sphere.linear_velocity
+	var desired_x = max(min(velocity.y / 2, 20), -20)
+	var desired_y = max(min(-velocity.x / 2, 45), -45)
+	var difference_x = $Camera.rotation_degrees.x - desired_x
+	var difference_y = $Camera.rotation_degrees.y - desired_y
+	$Camera.rotation_degrees.x -= max(min(difference_x / 4, 3), -3)
+	$Camera.rotation_degrees.y -= max(min(difference_y / 4, 3), -3)
+	
+	## FOV of the camera, so it unzooms more at higher velocities
+	const default_fov = 75
+	var total_velocity = abs(velocity.x) + abs(velocity.y)
+	$Camera.fov = default_fov + (total_velocity / 12)
+"
+
+[node name="Player" type="Node"]
+script = SubResource("GDScript_bnqcw")
+
+[node name="Gravity" parent="." instance=ExtResource("1_h0h2o")]
+
+[node name="Sphere" parent="." instance=ExtResource("2_ophnk")]
+
+[node name="Camera" type="Camera3D" parent="."]

elements/sphere.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=7 format=3 uid="uid://df5m716pd6mej"]
+[gd_scene load_steps=9 format=3 uid="uid://df5m716pd6mej"]
 
 [sub_resource type="PhysicsMaterial" id="PhysicsMaterial_vumbr"]
 bounce = 0.8
@@ -85,6 +85,16 @@ fill_to = Vector2(0.504762, 1)
 [sub_resource type="StandardMaterial3D" id="StandardMaterial3D_14eku"]
 albedo_texture = SubResource("GradientTexture2D_vxsyc")
 
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_4tofj"]
+direction = Vector3(0, 0, 0)
+gravity = Vector3(0, 0, 0)
+
+[sub_resource type="SphereMesh" id="SphereMesh_1m3ut"]
+radius = 0.2
+height = 0.4
+radial_segments = 8
+rings = 4
+
 [node name="Sphere" type="RigidBody3D"]
 axis_lock_linear_z = true
 physics_material_override = SubResource("PhysicsMaterial_vumbr")
@@ -97,3 +107,8 @@ shape = SubResource("SphereShape3D_xfgrm")
 radial_segments = 20
 rings = 10
 material = SubResource("StandardMaterial3D_14eku")
+
+[node name="GPUParticles3D" type="GPUParticles3D" parent="."]
+amount = 16
+process_material = SubResource("ParticleProcessMaterial_4tofj")
+draw_pass_1 = SubResource("SphereMesh_1m3ut")