Overly complex method of painting a bar

levels/sandbox/sandbox.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=37 format=3 uid="uid://16ds4fvv72xk"]
+[gd_scene load_steps=39 format=3 uid="uid://16ds4fvv72xk"]
 
 [ext_resource type="PackedScene" uid="uid://c2omlx4ptrc01" path="res://src/world/gunk_body/gunk_body.tscn" id="1_a67lu"]
 [ext_resource type="PackedScene" uid="uid://bwe2jdmvinhqd" path="res://src/player/player.tscn" id="1_h436a"]
@@ -9,13 +9,18 @@
 [ext_resource type="ArrayMesh" uid="uid://bwgiytiic3t32" path="res://assets/props/cube/cube.obj" id="6_4kku3"]
 [ext_resource type="ArrayMesh" uid="uid://dchtriuljuloj" path="res://assets/props/cylinder/cylinder.obj" id="7_gn6k6"]
 
+[sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_cj8bk"]
+
+[sub_resource type="Sky" id="Sky_8jqw1"]
+sky_material = SubResource("ProceduralSkyMaterial_cj8bk")
+
 [sub_resource type="Environment" id="Environment_cc548"]
-background_mode = 1
+background_mode = 2
+sky = SubResource("Sky_8jqw1")
 ambient_light_source = 2
 ambient_light_color = Color(1, 1, 1, 1)
 ambient_light_energy = 0.06
 tonemap_mode = 3
-fog_enabled = true
 fog_light_color = Color(0, 0, 0, 1)
 fog_density = 0.2
 

src/player/player.gd

@@ -7,7 +7,7 @@ const JUMP_FORCE := 4.5
 const GROUND_FRICTION := 0.3
 const AIR_FRICTION := 0.03
 
-const SPRAY_RADIUS := 8
+const SPRAY_SCALE := 8
 
 var gravity: Vector3 = (
 	ProjectSettings.get_setting("physics/3d/default_gravity")
@@ -16,6 +16,8 @@ var gravity: Vector3 = (
 
 @onready var camera_pivot: Node3D = %CameraPivot
 @onready var spray_muzzle: Marker3D = %SprayMuzzle
+@onready var ray_cast_left: RayCast3D = %RayCastLeft
+@onready var ray_cast_right: RayCast3D = %RayCastRight
 
 @onready var spray_effect: MeshInstance3D = %SprayEffect
 
@@ -34,15 +36,24 @@ func get_friction() -> float:
 	return AIR_FRICTION
 
 
+func _scale_spray_point(point: Vector3) -> float:
+	return point.distance_to(spray_muzzle.global_position) * SPRAY_SCALE
+
+
 func fire_spray() -> void:
-	for raycast: RayCast3D in get_tree().get_nodes_in_group("SprayCast"):
+	if ray_cast_left.is_colliding() and ray_cast_right.is_colliding():
-		if raycast.is_colliding():
+		var collider := ray_cast_left.get_collider()
-			var collider := raycast.get_collider()
+		if collider is GunkBody and collider == ray_cast_right.get_collider():
-			if collider is GunkBody:
+			var point_left := ray_cast_left.get_collision_point()
-				# Adjust radius to compensate for distance from muzzle
+			var point_right := ray_cast_right.get_collision_point()
-				var point := raycast.get_collision_point()
+			(collider as GunkBody).paint_bar(
-				var radius := sqrt(point.distance_to(spray_muzzle.global_position)) * SPRAY_RADIUS
+				point_left,
-				(collider as GunkBody).paint_mask(point, raycast.get_collision_normal(), radius)
+				ray_cast_left.get_collision_normal(),
+				_scale_spray_point(point_left),
+				point_right,
+				ray_cast_right.get_collision_normal(),
+				_scale_spray_point(point_right)
+			)
 
 
 func _physics_process(delta: float) -> void:

src/player/player.tscn

@@ -38,20 +38,13 @@ mesh = SubResource("BoxMesh_ua7a2")
 unique_name_in_owner = true
 transform = Transform3D(1, 0, 0, 0, 0.997564, -0.0697565, 0, 0.0697565, 0.997564, 0, 0, -0.15)
 
-[node name="RayCast3D" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
+[node name="RayCastLeft" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
-target_position = Vector3(-0.2, 0, -2)
+unique_name_in_owner = true
+target_position = Vector3(-0.25, 0, -2)
 
-[node name="RayCast3D2" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
+[node name="RayCastRight" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
-target_position = Vector3(-0.1, 0, -2)
+unique_name_in_owner = true
-
+target_position = Vector3(0.25, 0, -2)
-[node name="RayCast3D3" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
-target_position = Vector3(0, 0, -2)
-
-[node name="RayCast3D4" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
-target_position = Vector3(0.1, 0, -2)
-
-[node name="RayCast3D5" type="RayCast3D" parent="CameraPivot/SprayNozzle/SprayMuzzle" groups=["SprayCast"]]
-target_position = Vector3(0.2, 0, -2)
 
 [node name="SprayEffect" type="MeshInstance3D" parent="CameraPivot/SprayNozzle/SprayMuzzle"]
 unique_name_in_owner = true

src/world/gunk_body/gunk_body.gd

@@ -4,6 +4,18 @@ class_name GunkBody extends StaticBody3D
 const FACE_EPSILON := 0.4
 const MASK_COLOR := Color.RED
 
+const WRAPPINGS := [
+	Vector2(-1, -1),
+	Vector2(-1, 0),
+	Vector2(-1, 1),
+	Vector2(0, -1),
+	Vector2(0, 0),
+	Vector2(0, 1),
+	Vector2(1, -1),
+	Vector2(1, 0),
+	Vector2(1, 1),
+]
+
 @export var mask_dim := 1024
 
 var meshtool := MeshDataTool.new()
@@ -75,7 +87,7 @@ func _get_uv(point: Vector3, normal: Vector3) -> Vector2:
 
 
 ## Paint a circle on the mask at a given point & normal on the mesh.
-func paint_mask(point: Vector3, normal: Vector3, radius: int) -> void:
+func paint_mask(point: Vector3, normal: Vector3, radius: float) -> void:
 	var local_point := point * global_transform
 	var local_normal := normal * global_basis
 	var uv := _get_uv(local_point, local_normal)
@@ -85,3 +97,62 @@ func paint_mask(point: Vector3, normal: Vector3, radius: int) -> void:
 	mask_control.queue_draw(
 		func() -> void: mask_control.draw_circle(px_center, radius, MASK_COLOR, true, -1, true)
 	)
+
+
+func paint_line(
+	point_a: Vector3, normal_a: Vector3, point_b: Vector3, normal_b: Vector3, width: float
+) -> void:
+	var uv_a := _get_uv(point_a * global_transform, normal_a * global_basis)
+	var uv_b := _get_uv(point_b * global_transform, normal_b * global_basis)
+	if uv_a == Vector2.INF or uv_b == Vector2.INF:
+		return
+	var px_a := uv_a * mask_control.size
+	var px_b := uv_b * mask_control.size
+	mask_control.queue_draw(
+		func() -> void: mask_control.draw_line(px_a, px_b, MASK_COLOR, width, true)
+	)
+
+
+func _render_bar(uv_a: Vector2, scale_a: float, uv_b: Vector2, scale_b: float) -> void:
+	var diff := (uv_b - uv_a).normalized()
+	var ortho := diff.orthogonal()
+
+	var points := PackedVector2Array(
+		[
+			uv_a + ortho * scale_a,
+			uv_a - ortho * scale_a,
+			uv_b - ortho * scale_b,
+			uv_b + ortho * scale_b,
+		]
+	)
+
+	mask_control.queue_draw(func() -> void: mask_control.draw_colored_polygon(points, MASK_COLOR))
+
+
+func paint_bar(
+	point_a: Vector3,
+	normal_a: Vector3,
+	scale_a: float,
+	point_b: Vector3,
+	normal_b: Vector3,
+	scale_b: float
+) -> void:
+	var uv_a := _get_uv(point_a * global_transform, normal_a * global_basis) * mask_control.size
+	var uv_b := _get_uv(point_b * global_transform, normal_b * global_basis) * mask_control.size
+	if uv_a == Vector2.INF or uv_b == Vector2.INF:
+		return  # TODO just draw square around one valid point
+
+	var closest_b := uv_b
+	var wrapped_a := uv_a
+	var dist_sq := INF
+
+	for wrap_vec: Vector2 in WRAPPINGS:
+		var wrapped_b := uv_b + wrap_vec * mask_dim
+		var d := wrapped_b.distance_squared_to(uv_a)
+		if d < dist_sq:
+			closest_b = wrapped_b
+			wrapped_a = uv_a - wrap_vec * mask_dim
+			dist_sq = d
+
+	_render_bar(uv_a, scale_a, closest_b, scale_b)
+	_render_bar(wrapped_a, scale_a, uv_b, scale_b)

src/world/gunk_body/gunk_body.tscn

@@ -11,6 +11,7 @@ unique_name_in_owner = true
 handle_input_locally = false
 msaa_2d = 3
 canvas_item_default_texture_filter = 0
+canvas_item_default_texture_repeat = 1
 size = Vector2i(1024, 1024)
 render_target_clear_mode = 1
 render_target_update_mode = 4