friction and sand pit

objects/canny_cat.gd

@@ -11,6 +11,8 @@ extends CharacterBody3D
 @export_group("Movement")
 @export var gravity: float
 @export var friction: float
+@export var friction_coef: float
+@export var friction_pow: float
 @export var stop_threshold: float
 
 @export_group("Camera", "camera_")
@@ -101,13 +103,18 @@ func _apply_gravity(delta: float) -> void:
 
 func _slow_to_stop(delta: float) -> void:
 	if is_on_floor():
-		var new_velocity = velocity
+		var new_velocity = velocity * Vector3(1.0, 0.0, 1.0)
-		new_velocity.y = 0.0
+		
+		#new_velocity = lerp(new_velocity, Vector3.ZERO, friction_coef * delta)
+		#new_velocity = lerp(
+			#new_velocity, Vector3.ZERO,
+			#power_scale * pow(friction_coef / new_velocity.length(), friction_pow * delta)
+		#)
 		new_velocity = new_velocity.move_toward(Vector3.ZERO, friction * delta)
 		if new_velocity.length_squared() <= stop_threshold * stop_threshold:
 			new_velocity = Vector3.ZERO
-		new_velocity.y = velocity.y
+		velocity.x = new_velocity.x
-		velocity = new_velocity
+		velocity.z = new_velocity.z
 
 func _bounce_on_walls(delta: float = 0.0) -> void:
 	var h_vel = (prev_velocity * Vector3(1.0, 0.0, 1.0))

objects/canny_cat.tscn

@@ -45,7 +45,9 @@ power_scale = 20.0
 power_sensitivity = 0.01
 power_threshold = 0.2
 gravity = 10.0
-friction = 5.0
+friction = 10.0
+friction_coef = 0.01
+friction_pow = 60.0
 stop_threshold = 0.1
 camera_low_angle = 0.349066
 camera_high_angle = 1.0472

objects/sand_pit.gd

@@ -0,0 +1,30 @@
+extends CSGPolygon3D
+
+
+@export var friction: float
+
+@export_group("Node References")
+@export var collision_polygon: CollisionPolygon3D
+
+
+var _players: Array[Player] = []
+
+
+func _ready() -> void:
+	collision_polygon.polygon = polygon
+	collision_polygon.depth = depth
+
+
+func _physics_process(delta: float) -> void:
+	for player in _players:
+		player.velocity = lerp(player.velocity, Vector3.ZERO, friction * delta)
+
+
+func _on_body_entered(body: Node3D) -> void:
+	if body is Player:
+		_players.append(body)
+
+
+func _on_body_exited(body: Node3D) -> void:
+	if body is Player:
+		_players.erase(body)

objects/sand_pit.tscn

@@ -0,0 +1,31 @@
+[gd_scene load_steps=4 format=3 uid="uid://bfic5n608nc5j"]
+
+[ext_resource type="Texture2D" uid="uid://djx2x3jjn01w2" path="res://assets/textures/world/sand.png" id="1_yg8om"]
+[ext_resource type="Script" path="res://objects/sand_pit.gd" id="2_vtyum"]
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_r0cip"]
+shading_mode = 2
+specular_mode = 2
+albedo_texture = ExtResource("1_yg8om")
+metallic_specular = 0.0
+uv1_triplanar = true
+uv1_world_triplanar = true
+texture_filter = 0
+
+[node name="SandPit" type="CSGPolygon3D" node_paths=PackedStringArray("collision_polygon")]
+process_physics_priority = 100
+transform = Transform3D(1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 0, 0, 0)
+depth = 0.03
+material = SubResource("StandardMaterial3D_r0cip")
+script = ExtResource("2_vtyum")
+friction = 9.0
+collision_polygon = NodePath("Area3D/CollisionPolygon3D")
+
+[node name="Area3D" type="Area3D" parent="."]
+collision_layer = 0
+collision_mask = 16
+
+[node name="CollisionPolygon3D" type="CollisionPolygon3D" parent="Area3D"]
+
+[connection signal="body_entered" from="Area3D" to="." method="_on_body_entered"]
+[connection signal="body_exited" from="Area3D" to="." method="_on_body_exited"]

test_scene.tscn

@@ -1,9 +1,10 @@
-[gd_scene load_steps=8 format=3 uid="uid://dllug6vijj18o"]
+[gd_scene load_steps=9 format=3 uid="uid://dllug6vijj18o"]
 
 [ext_resource type="PackedScene" uid="uid://cybm74xwbsivx" path="res://objects/canny_cat.tscn" id="1_8qiqb"]
 [ext_resource type="MeshLibrary" uid="uid://cbs170roel08g" path="res://assets/mesh_libraries/w1/w1_floors.meshlib" id="2_ohutf"]
 [ext_resource type="MeshLibrary" uid="uid://bqxgr3arh0i7f" path="res://assets/mesh_libraries/w1/w1_walls.meshlib" id="3_k3r2h"]
 [ext_resource type="PackedScene" uid="uid://cdpgby3r6xe4n" path="res://objects/goal_post.tscn" id="4_71ems"]
+[ext_resource type="PackedScene" uid="uid://bfic5n608nc5j" path="res://objects/sand_pit.tscn" id="5_7n16u"]
 
 [sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_akirf"]
 
@@ -26,18 +27,7 @@ mesh_library = ExtResource("2_ohutf")
 cell_size = Vector3(1, 1, 1)
 cell_center_y = false
 data = {
-"cells": PackedInt32Array(0, 0, 0, 0, 65535, 0, 65535, 65535, 0, 65535, 0, 0, 65534, 0, 0, 65534, 65535, 0, 65534, 65534, 0, 65535, 65534, 0, 0, 65534, 0, 1, 65534, 0, 1, 65535, 0, 1, 0, 0, 0, 1, 0, 65535, 1, 0, 65534, 1, 0, 1, 1, 0, 1, 2, 0, 0, 2, 0, 65535, 2, 0, 65534, 2, 0, 65533, 2, 0, 65533, 1, 0, 65533, 0, 0, 65533, 65535, 0, 65533, 65534, 0, 65533, 65533, 0, 65534, 65533, 0, 0, 65533, 0, 65535, 65533, 0, 2, 0, 0, 2, 1, 0, 3, 2, 0, 3, 1, 0, 0, 65532, 0, 65535, 65532, 0, 65534, 65532, 0, 65533, 65532, 0, 65532, 65532, 0, 65532, 65533, 0, 65532, 65534, 0, 65532, 65535, 0, 65532, 1, 0, 65532, 0, 0, 65532, 2, 0, 65532, 3, 0, 65533, 3, 0, 65534, 3, 0, 65535, 3, 0, 1, 3, 0, 2, 3, 0, 3, 3, 0, 0, 3, 0, 4, 3, 0, 4, 2, 0, 4, 1, 0, 2, 2, 0, 5, 4, 0, 4, 4, 0, 3, 4, 0, 2, 4, 0, 1, 4, 0, 0, 4, 0, 0, 5, 0, 65535, 5, 0, 65534, 5, 0, 65533, 5, 0, 65533, 4, 0, 65532, 4, 0, 65534, 4, 0, 65535, 4, 0, 3, 5, 0, 4, 5, 0, 5, 5, 0, 2, 5, 0, 1, 5, 0, 65532, 5, 0, 65531, 5, 0, 65531, 4, 0, 65531, 3, 0, 65531, 2, 0, 65531, 1, 0, 65530, 1, 0, 65530, 0, 0, 65530, 65535, 0, 65530, 65534, 0, 65530, 65533, 0, 65531, 65534, 0, 65531, 65535, 0, 65531, 0, 0, 65531, 65533, 0, 65531, 65532, 0, 65531, 65531, 0, 65532, 65531, 0, 65533, 65531, 0, 65534, 65531, 0, 65535, 65531, 0, 0, 65531, 0, 6, 65531, 0, 5, 1, 0, 5, 2, 0, 5, 3, 0, 6, 0, 0, 6, 65535, 0, 6, 65534, 0, 5, 0, 0, 7, 65535, 0, 7, 65534, 0, 8, 65533, 0, 8, 65534, 0, 7, 0, 0, 6, 1, 0, 6, 2, 0, 6, 4, 0, 6, 3, 0, 7, 2, 0, 7, 1, 0, 8, 1, 0, 8, 0, 0)
+"cells": PackedInt32Array(0, 65535, 0, 65535, 65535, 0, 65535, 0, 1441792, 65534, 0, 0, 65534, 65535, 0, 65534, 65534, 0, 65535, 65534, 0, 0, 65534, 0, 1, 65534, 0, 1, 65535, 0, 1, 0, 1441792, 65535, 1, 0, 65534, 1, 0, 1, 2, 0, 0, 2, 0, 65535, 2, 0, 65534, 2, 0, 65533, 2, 0, 65533, 1, 0, 65533, 0, 0, 65533, 65535, 0, 65533, 65534, 0, 65533, 65533, 0, 65534, 65533, 0, 0, 65533, 0, 65535, 65533, 0, 2, 1, 1441792, 3, 2, 0, 3, 1, 0, 0, 65532, 0, 65535, 65532, 0, 65534, 65532, 0, 65533, 65532, 0, 65532, 65532, 0, 65532, 65533, 0, 65532, 65534, 0, 65532, 65535, 0, 65532, 1, 0, 65532, 0, 0, 65532, 2, 0, 65532, 3, 0, 65533, 3, 0, 65534, 3, 0, 65535, 3, 0, 1, 3, 0, 2, 3, 0, 3, 3, 0, 0, 3, 0, 4, 3, 0, 4, 2, 0, 4, 1, 0, 2, 2, 0, 5, 4, 0, 4, 4, 0, 3, 4, 0, 2, 4, 0, 1, 4, 0, 0, 4, 0, 0, 5, 0, 65535, 5, 0, 65534, 5, 0, 65533, 5, 0, 65533, 4, 0, 65532, 4, 0, 65534, 4, 0, 65535, 4, 0, 3, 5, 0, 4, 5, 0, 5, 5, 0, 2, 5, 0, 1, 5, 0, 65532, 5, 0, 65531, 5, 0, 65531, 4, 0, 65531, 3, 0, 65531, 2, 0, 65531, 1, 0, 65530, 1, 0, 65530, 0, 0, 65530, 65535, 0, 65530, 65534, 0, 65530, 65533, 0, 65531, 65534, 0, 65531, 65535, 0, 65531, 0, 0, 65531, 65533, 0, 65531, 65532, 0, 65531, 65531, 0, 65532, 65531, 0, 65533, 65531, 0, 65534, 65531, 0, 65535, 65531, 0, 0, 65531, 0, 6, 65531, 0, 5, 1, 0, 5, 2, 0, 5, 3, 0, 6, 0, 0, 6, 65535, 0, 6, 65534, 0, 5, 0, 0, 7, 65535, 0, 7, 65534, 0, 8, 65533, 0, 8, 65534, 0, 7, 0, 0, 6, 1, 0, 6, 2, 0, 6, 4, 0, 6, 3, 0, 7, 2, 0, 7, 1, 0, 8, 1, 0, 8, 0, 0, 1, 1, 1441792, 0, 1, 1441792, 3, 0, 1441792, 4, 0, 1441792, 4, 65535, 1441792, 3, 65535, 1441792, 2, 65534, 1441792, 2, 65533, 1441792, 1, 65533, 1441792, 1, 65532, 1441792, 1, 65531, 1441792, 2, 65531, 1441792, 2, 65530, 1441792, 3, 65530, 1441792, 3, 65531, 1441792, 2, 65532, 1441792, 4, 65532, 1441792, 4, 65531, 1441792, 5, 65531, 1441792, 5, 65532, 1441792, 5, 65533, 1441792, 5, 65534, 1441792, 5, 65535, 1441792, 4, 65534, 1441792, 4, 65533, 1441792, 6, 65533, 1441792, 6, 65532, 1441792, 3, 65532, 1441792, 3, 65533, 1441792, 3, 65534, 1441792, 2, 65535, 1441792, 2, 0, 1441792, 0, 0, 1441792)
-}
-metadata/_editor_floor_ = Vector3(0, 0, 0)
-
-[node name="FrictionFloor" type="GridMap" parent="." groups=["friction_floor"]]
-mesh_library = ExtResource("2_ohutf")
-cell_size = Vector3(1, 1, 1)
-cell_center_y = false
-collision_layer = 2
-collision_mask = 0
-data = {
-"cells": PackedInt32Array(4, 0, 1, 3, 0, 1, 3, 65535, 1, 2, 65535, 1, 2, 65534, 1, 2, 65533, 1, 1, 65533, 1, 1, 65532, 1, 1, 65531, 1, 2, 65531, 1, 2, 65530, 1, 3, 65530, 1, 3, 65531, 1, 3, 65532, 1, 2, 65532, 1, 4, 65532, 1, 4, 65531, 1, 5, 65531, 1, 5, 65532, 1, 5, 65533, 1, 6, 65532, 1, 6, 65533, 1, 4, 65533, 1, 3, 65533, 1, 3, 65534, 1, 4, 65534, 1, 5, 65534, 1, 5, 65535, 1, 4, 65535, 1)
 }
 metadata/_editor_floor_ = Vector3(0, 0, 0)
 
@@ -59,20 +49,6 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.926551, 3.63641)
 [node name="GoalPost" parent="." instance=ExtResource("4_71ems")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -2, -2.38419e-07, -4)
 
-[node name="CanvasLayer" type="CanvasLayer" parent="."]
+[node name="CSGPolygon3D" parent="." instance=ExtResource("5_7n16u")]
-
+transform = Transform3D(1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 2, 0, -4)
-[node name="SubViewportContainer" type="SubViewportContainer" parent="CanvasLayer"]
+polygon = PackedVector2Array(0, -1, 1, -1, 3, 0, 3, 2, 2, 3, -1, 2, -2, 0)
-custom_minimum_size = Vector2(128, 128)
-stretch = true
-
-[node name="s" type="SubViewport" parent="CanvasLayer/SubViewportContainer"]
-transparent_bg = true
-handle_input_locally = false
-size = Vector2i(128, 128)
-render_target_update_mode = 4
-
-[node name="Camera3D" type="Camera3D" parent="CanvasLayer/SubViewportContainer/s"]
-transform = Transform3D(1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 2.545, 10, 0)
-projection = 1
-current = true
-size = 20.0