outline shader & disable bat flip

project.godot

@@ -18,8 +18,8 @@ config/icon="res://icon.png"
 
 [autoload]
 
-Global="*res://src/global.gd"
-Window="*res://src/window.gd"
+Global="*res://src/scripts/global.gd"
+Window="*res://src/scripts/window.gd"
 EnemyClass="*res://src/scripts/enemy_class.gd"
 
 [display]
@@ -83,4 +83,5 @@ common/enable_pause_aware_picking=true
 [rendering]
 
 quality/driver/driver_name="GLES2"
+environment/default_clear_color=Color( 0, 0, 0, 1 )
 environment/default_environment="res://default_env.tres"

res/shaders/outline.tres

@@ -0,0 +1,65 @@
+[gd_resource type="Shader" format=2]
+
+[resource]
+code = "shader_type canvas_item;
+
+uniform vec4 color : hint_color = vec4(1.0);
+uniform float width : hint_range(0, 10) = 1.0;
+uniform int pattern : hint_range(0, 2) = 0; // diamond, circle, square
+uniform bool inside = false;
+uniform bool add_margins = true; // only useful when inside is false
+
+void vertex() {
+	if (add_margins) {
+		VERTEX += (UV * 2.0 - 1.0) * width;
+	}
+}
+
+bool hasContraryNeighbour(vec2 uv, vec2 texture_pixel_size, sampler2D texture) {
+	for (float i = -ceil(width); i <= ceil(width); i++) {
+		float x = abs(i) > width ? width * sign(i) : i;
+		float offset;
+		
+		if (pattern == 0) {
+			offset = width - abs(x);
+		} else if (pattern == 1) {
+			offset = floor(sqrt(pow(width + 0.5, 2) - x * x));
+		} else if (pattern == 2) {
+			offset = width;
+		}
+		
+		for (float j = -ceil(offset); j <= ceil(offset); j++) {
+			float y = abs(j) > offset ? offset * sign(j) : j;
+			vec2 xy = uv + texture_pixel_size * vec2(x, y);
+			
+			if ((xy != clamp(xy, vec2(0.0), vec2(1.0)) || texture(texture, xy).a == 0.0) == inside) {
+				return true;
+			}
+		}
+	}
+	
+	return false;
+}
+
+void fragment() {
+	vec2 uv = UV;
+	
+	if (add_margins) {
+		vec2 texture_pixel_size = vec2(1.0) / (vec2(1.0) / TEXTURE_PIXEL_SIZE + vec2(width * 2.0));
+		
+		uv = (uv - texture_pixel_size * width) * TEXTURE_PIXEL_SIZE / texture_pixel_size;
+		
+		if (uv != clamp(uv, vec2(0.0), vec2(1.0))) {
+			COLOR.a = 0.0;
+		} else {
+			COLOR = texture(TEXTURE, uv);
+		}
+	} else {
+		COLOR = texture(TEXTURE, uv);
+	}
+	
+	if ((COLOR.a > 0.0) == inside && hasContraryNeighbour(uv, TEXTURE_PIXEL_SIZE, TEXTURE)) {
+		COLOR.rgb = inside ? mix(COLOR.rgb, color.rgb, color.a) : color.rgb;
+		COLOR.a += (1.0 - COLOR.a) * color.a;
+	}
+}"

src/models/enemies/bat/Bat.tscn

@@ -15,6 +15,7 @@ collision_mask = 2
 script = ExtResource( 2 )
 
 [node name="Sprite" type="Sprite" parent="."]
+use_parent_material = true
 texture = ExtResource( 1 )
 centered = false
 

src/models/enemies/bat/bat.gd

@@ -8,9 +8,6 @@ onready var player = $"../../Player"
 func _ready():
 	hp = 15
 
-func _process(_delta):
-	get_node("Sprite").flip_h = true if player.global_position.x > self.position.x else false
-
 func _physics_process(_delta):
 	var player_position = player.global_position + Vector2(8, 8)
 	var angle = get_angle_to(player_position)

src/models/enemies/ghost/Ghost.tscn

@@ -11,6 +11,7 @@ z_index = 2
 script = ExtResource( 2 )
 
 [node name="Sprite" type="Sprite" parent="."]
+use_parent_material = true
 texture = ExtResource( 1 )
 centered = false
 

src/models/player/player.gd

@@ -27,6 +27,9 @@ func _physics_process(_delta):
 	velocity = move_and_slide(velocity * speed_multiplier)
 	choose_target()
 
+const SHADER = preload("res://res/shaders/outline.tres")
+
+
 func choose_target():
 	var least_dist = 4000
 	var enemy_dist
@@ -36,3 +39,4 @@ func choose_target():
 		if enemy_dist < least_dist:
 			least_dist = enemy_dist
 			target = enemy
+			#enemy.set_shader_param("width", 0)

src/scenes/game/Game.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=20 format=2]
+[gd_scene load_steps=24 format=2]
 
 [ext_resource path="res://src/scenes/menu/background/background.png" type="Texture" id=1]
 [ext_resource path="res://src/scenes/game/sprites/background_houses.png" type="Texture" id=2]
@@ -15,6 +15,7 @@
 [ext_resource path="res://src/models/enemies/trash_can/TrashCan.tscn" type="PackedScene" id=13]
 [ext_resource path="res://src/models/enemies/bat/Bat.tscn" type="PackedScene" id=14]
 [ext_resource path="res://src/models/enemies/ghost/Ghost.tscn" type="PackedScene" id=15]
+[ext_resource path="res://res/shaders/outline.tres" type="Shader" id=16]
 
 [sub_resource type="RectangleShape2D" id=2]
 extents = Vector2( 10, 60 )
@@ -22,6 +23,30 @@ extents = Vector2( 10, 60 )
 [sub_resource type="RectangleShape2D" id=3]
 extents = Vector2( 140, 10.125 )
 
+[sub_resource type="ShaderMaterial" id=5]
+shader = ExtResource( 16 )
+shader_param/color = Color( 1, 0.870588, 0, 1 )
+shader_param/width = 1.0
+shader_param/pattern = 0
+shader_param/inside = false
+shader_param/add_margins = true
+
+[sub_resource type="ShaderMaterial" id=6]
+shader = ExtResource( 16 )
+shader_param/color = Color( 1, 0.870588, 0, 1 )
+shader_param/width = 1.0
+shader_param/pattern = 0
+shader_param/inside = false
+shader_param/add_margins = true
+
+[sub_resource type="ShaderMaterial" id=7]
+shader = ExtResource( 16 )
+shader_param/color = Color( 1, 0.870588, 0, 1 )
+shader_param/width = 1.0
+shader_param/pattern = 0
+shader_param/inside = true
+shader_param/add_margins = true
+
 [sub_resource type="DynamicFont" id=1]
 size = 8
 font_data = ExtResource( 4 )
@@ -76,14 +101,17 @@ shape = SubResource( 3 )
 [node name="TrashCan" parent="View/Enemies" instance=ExtResource( 13 )]
 
 [node name="Bat" parent="View/Enemies" instance=ExtResource( 14 )]
+material = SubResource( 5 )
 z_index = 1
 
 [node name="Bat2" parent="View/Enemies" instance=ExtResource( 14 )]
+material = SubResource( 6 )
 position = Vector2( 142, 54 )
 z_index = 1
 
 [node name="Ghost" parent="View/Enemies" instance=ExtResource( 15 )]
-position = Vector2( 400, 50 )
+material = SubResource( 7 )
+position = Vector2( 509, 100 )
 
 [node name="Player" parent="View" instance=ExtResource( 5 )]
 position = Vector2( 46, 42 )

src/scripts/window.gd

@@ -19,4 +19,3 @@ func _input(event):
 	#	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
 	#if event is InputEventKey and event.scancode == 16777240 and event.pressed: #scancode 16777240 == KEY_ALT
 	#	Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
-