Add red flashing when characters are hit

Hiro/hiro_ai.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=53 format=3 uid="uid://dd2km6qhpdicx"]
+[gd_scene load_steps=55 format=3 uid="uid://dd2km6qhpdicx"]
 
 [ext_resource type="Script" path="res://Scripts/hiro_ai.gd" id="1_inmen"]
+[ext_resource type="Shader" uid="uid://bcnip762rd6yj" path="res://Shaders/character.tres" id="2_6u0oh"]
 [ext_resource type="Texture2D" uid="uid://cm7tgomrcvq30" path="res://Hiro/Hiro Walk Sprite Cycle Line Up.png" id="2_ctdbh"]
 [ext_resource type="AnimationLibrary" uid="uid://dincs5x4qucal" path="res://Hiro/hiro_animation.tres" id="3_umwtx"]
 [ext_resource type="Script" path="res://addons/godot_state_charts/state_chart.gd" id="6_i4c04"]
@@ -9,6 +10,10 @@
 [ext_resource type="Script" path="res://addons/godot_state_charts/expression_guard.gd" id="9_ak1rc"]
 [ext_resource type="Script" path="res://addons/godot_state_charts/transition.gd" id="9_la16b"]
 
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_7ckhc"]
+shader = ExtResource("2_6u0oh")
+shader_parameter/FlashColor = Color(1, 0, 0, 0)
+
 [sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_tyc74"]
 animation = &"hurt_west"
 
@@ -223,6 +228,7 @@ script = ExtResource("1_inmen")
 [node name="Sprite2D" type="Sprite2D" parent="."]
 modulate = Color(0.498039, 0.498039, 0.498039, 1)
 texture_filter = 1
+material = SubResource("ShaderMaterial_7ckhc")
 position = Vector2(0, -13)
 texture = ExtResource("2_ctdbh")
 hframes = 20

Hiro/hiro_animation.tres

@@ -90,6 +90,18 @@ tracks/6/keys = {
 "update": 1,
 "values": [true]
 }
+tracks/7/type = "value"
+tracks/7/imported = false
+tracks/7/enabled = true
+tracks/7/path = NodePath("Sprite2D:material:shader_parameter/FlashColor")
+tracks/7/interp = 1
+tracks/7/loop_wrap = true
+tracks/7/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Color(1, 0, 0, 0)]
+}
 
 [sub_resource type="Animation" id="Animation_kvnht"]
 resource_name = "hurt_east"
@@ -143,6 +155,18 @@ tracks/3/keys = {
 "update": 1,
 "values": [6, 7, 8, 9]
 }
+tracks/4/type = "value"
+tracks/4/imported = false
+tracks/4/enabled = true
+tracks/4/path = NodePath("Sprite2D:material:shader_parameter/FlashColor")
+tracks/4/interp = 1
+tracks/4/loop_wrap = true
+tracks/4/keys = {
+"times": PackedFloat32Array(0, 0.5),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Color(1, 0, 0, 1), Color(1, 0, 0, 0)]
+}
 
 [sub_resource type="Animation" id="Animation_fytkh"]
 resource_name = "hurt_north"
@@ -196,6 +220,18 @@ tracks/3/keys = {
 "update": 1,
 "values": [10, 11, 12, 13]
 }
+tracks/4/type = "value"
+tracks/4/imported = false
+tracks/4/enabled = true
+tracks/4/path = NodePath("Sprite2D:material:shader_parameter/FlashColor")
+tracks/4/interp = 1
+tracks/4/loop_wrap = true
+tracks/4/keys = {
+"times": PackedFloat32Array(0, 0.5),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Color(1, 0, 0, 1), Color(1, 0, 0, 0)]
+}
 
 [sub_resource type="Animation" id="Animation_lw5of"]
 resource_name = "hurt_south"
@@ -249,6 +285,18 @@ tracks/3/keys = {
 "update": 1,
 "values": [1, 2, 3, 4]
 }
+tracks/4/type = "value"
+tracks/4/imported = false
+tracks/4/enabled = true
+tracks/4/path = NodePath("Sprite2D:material:shader_parameter/FlashColor")
+tracks/4/interp = 1
+tracks/4/loop_wrap = true
+tracks/4/keys = {
+"times": PackedFloat32Array(0, 0.5),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Color(1, 0, 0, 1), Color(1, 0, 0, 0)]
+}
 
 [sub_resource type="Animation" id="Animation_htnmm"]
 resource_name = "hurt_west"
@@ -302,6 +350,18 @@ tracks/3/keys = {
 "update": 1,
 "values": [16, 17, 18, 19]
 }
+tracks/4/type = "value"
+tracks/4/imported = false
+tracks/4/enabled = true
+tracks/4/path = NodePath("Sprite2D:material:shader_parameter/FlashColor")
+tracks/4/interp = 1
+tracks/4/loop_wrap = true
+tracks/4/keys = {
+"times": PackedFloat32Array(0, 0.5),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Color(1, 0, 0, 0.987594), Color(1, 0, 0, 0)]
+}
 
 [sub_resource type="Animation" id="Animation_3oagy"]
 resource_name = "idle_east"

Hiro/hiro_player.tscn

@@ -1,9 +1,15 @@
-[gd_scene load_steps=45 format=3 uid="uid://di21xheryhp0k"]
+[gd_scene load_steps=47 format=3 uid="uid://di21xheryhp0k"]
 
 [ext_resource type="Script" path="res://Scripts/hiro_player.gd" id="1_dtymi"]
 [ext_resource type="Texture2D" uid="uid://cm7tgomrcvq30" path="res://Hiro/Hiro Walk Sprite Cycle Line Up.png" id="1_ukwcc"]
+[ext_resource type="Shader" uid="uid://bcnip762rd6yj" path="res://Shaders/character.tres" id="2_tyej0"]
 [ext_resource type="AnimationLibrary" uid="uid://dincs5x4qucal" path="res://Hiro/hiro_animation.tres" id="3_ucyqo"]
 
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_ftlgj"]
+resource_local_to_scene = true
+shader = ExtResource("2_tyej0")
+shader_parameter/FlashColor = Color(1, 0, 0, 0)
+
 [sub_resource type="AnimationNodeAnimation" id="AnimationNodeAnimation_tyc74"]
 animation = &"hurt_west"
 
@@ -186,7 +192,7 @@ states/melee/position = Vector2(329, 224)
 states/walk/node = SubResource("AnimationNodeBlendSpace2D_vunsg")
 states/walk/position = Vector2(520, 108)
 transitions = ["Start", "idle", SubResource("AnimationNodeStateMachineTransition_akmuq"), "idle", "walk", SubResource("AnimationNodeStateMachineTransition_sn1tm"), "walk", "idle", SubResource("AnimationNodeStateMachineTransition_5i3fu"), "idle", "melee", SubResource("AnimationNodeStateMachineTransition_y8p74"), "melee", "idle", SubResource("AnimationNodeStateMachineTransition_l17k0"), "hurt", "idle", SubResource("AnimationNodeStateMachineTransition_ln3pc")]
-graph_offset = Vector2(-241, 18)
+graph_offset = Vector2(-239, -26)
 
 [sub_resource type="CapsuleShape2D" id="CapsuleShape2D_vm050"]
 radius = 8.0
@@ -205,6 +211,7 @@ script = ExtResource("1_dtymi")
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
 texture_filter = 1
+material = SubResource("ShaderMaterial_ftlgj")
 position = Vector2(0, -13)
 texture = ExtResource("1_ukwcc")
 hframes = 20

Shaders/character.tres

@@ -0,0 +1,55 @@
+[gd_resource type="VisualShader" load_steps=4 format=3 uid="uid://bcnip762rd6yj"]
+
+[sub_resource type="VisualShaderNodeColorParameter" id="VisualShaderNodeColorParameter_llme6"]
+expanded_output_ports = [0]
+parameter_name = "FlashColor"
+
+[sub_resource type="VisualShaderNodeInput" id="VisualShaderNodeInput_k72xm"]
+expanded_output_ports = [0]
+input_name = "color"
+
+[sub_resource type="VisualShaderNodeMix" id="VisualShaderNodeMix_oth8y"]
+default_input_values = [0, Vector3(0, 0, 0), 1, Vector3(1, 1, 1), 2, Vector3(0, 0, 0)]
+op_type = 3
+
+[resource]
+code = "shader_type canvas_item;
+render_mode blend_mix;
+
+uniform vec4 FlashColor : source_color;
+
+
+
+void fragment() {
+// Input:3
+	vec4 n_out3p0 = COLOR;
+	float n_out3p4 = n_out3p0.a;
+
+
+// ColorParameter:2
+	vec4 n_out2p0 = FlashColor;
+	float n_out2p4 = n_out2p0.a;
+
+
+// Mix:4
+	vec3 n_out4p0 = mix(vec3(n_out3p0.xyz), vec3(n_out2p0.xyz), vec3(n_out2p4));
+
+
+// Output:0
+	COLOR.rgb = n_out4p0;
+	COLOR.a = n_out3p4;
+
+
+}
+"
+graph_offset = Vector2(-103.937, -135.818)
+mode = 1
+flags/light_only = false
+nodes/fragment/0/position = Vector2(600, -60)
+nodes/fragment/2/node = SubResource("VisualShaderNodeColorParameter_llme6")
+nodes/fragment/2/position = Vector2(-40, 140)
+nodes/fragment/3/node = SubResource("VisualShaderNodeInput_k72xm")
+nodes/fragment/3/position = Vector2(-60, -60)
+nodes/fragment/4/node = SubResource("VisualShaderNodeMix_oth8y")
+nodes/fragment/4/position = Vector2(300, 100)
+nodes/fragment/connections = PackedInt32Array(3, 4, 0, 1, 3, 0, 4, 0, 2, 0, 4, 1, 4, 0, 0, 0, 2, 4, 4, 2)