Add hit flash

Author: Overkane

game/ship_skeleton/cell/cell.gd

@@ -15,6 +15,7 @@ var _related_movemenet_collision_shape: CollisionShape2D
 @onready var hurtbox_2d: ComponentHurtbox2D = %Hurtbox2D
 @onready var health_component: ComponentHealth = %Health
 @onready var sprite_2d: Sprite2D = %Sprite2D
+@onready var animation_player: AnimationPlayer = %AnimationPlayer
 
 
 func _ready() -> void:
@@ -65,4 +66,5 @@ func _on_health_depleted() -> void:
 		child_cell.health_component.current_health = 0
 
 func _on_hit(hitbox: ComponentHitbox2D) -> void:
+	animation_player.play(&"hit")
 	health_component.take_damage(hitbox.damage)

game/ship_skeleton/cell/cell.gdshader

@@ -1,6 +1,7 @@
 shader_type canvas_item;
 
 uniform float hp_ratio = 1.0;
+uniform bool is_hit_flash_active = false;
 
 void vertex() {
 	// Called for every vertex the material is visible on.
@@ -10,17 +11,19 @@ void fragment() {
 	// Called for every pixel the material is visible on.
 	vec4 tex_color = texture(TEXTURE, UV);
 
-	float dist = distance(UV, vec2(0.5));
+	if (is_hit_flash_active) {
+		tex_color = vec4(1,1,1, tex_color.a);
+	} else {
+		float dist = distance(UV, vec2(0.5));
 
-	if (tex_color.a > 0.0) {
-		if (dist < 0.5 * hp_ratio) {
-			tex_color.a = 1.0;
-		} else {
-			tex_color.a = 0.3;
+		if (tex_color.a > 0.0) {
+			if (dist < 0.5 * hp_ratio) {
+				tex_color.a = 1.0;
+			} else {
+				tex_color.a = 0.3;
+			}
 		}
 	}
-	//tex_color.a = mix(tex_color.a, 1.0, boost_factor);
-
 	COLOR = tex_color;
 }
 

game/ship_skeleton/cell/cell.tscn

@@ -10,10 +10,48 @@
 resource_local_to_scene = true
 shader = ExtResource("2_mnm1f")
 shader_parameter/hp_ratio = 1.0
+shader_parameter/is_hit_flash_active = false
 
 [sub_resource type="CircleShape2D" id="CircleShape2D_ruldg"]
 radius = 25.0
 
+[sub_resource type="Animation" id="Animation_mnm1f"]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:material:shader_parameter/is_hit_flash_active")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 1,
+"values": [false]
+}
+
+[sub_resource type="Animation" id="Animation_0jsgn"]
+resource_name = "hit"
+length = 0.1
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:material:shader_parameter/is_hit_flash_active")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.10000001),
+"transitions": PackedFloat32Array(1, 1),
+"update": 1,
+"values": [true, false]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_0xnlj"]
+_data = {
+&"RESET": SubResource("Animation_mnm1f"),
+&"hit": SubResource("Animation_0jsgn")
+}
+
 [node name="Cell" type="Node2D" unique_id=1435320636]
 script = ExtResource("1_cjhyy")
 repair_rate = 1.0
@@ -36,4 +74,8 @@ shape = SubResource("CircleShape2D_ruldg")
 unique_name_in_owner = true
 max_health = 15.0
 
+[node name="AnimationPlayer" type="AnimationPlayer" parent="." unique_id=1733586492]
+unique_name_in_owner = true
+libraries/ = SubResource("AnimationLibrary_0xnlj")
+
 [editable path="Hurtbox2D"]