ported from perforce

DonkeysAndDroids.Godot/debuffed_area.tscn

@@ -0,0 +1,67 @@
+[gd_scene load_steps=6 format=3 uid="uid://bv7h6vofl5nw3"]
+
+[ext_resource type="Script" uid="uid://gdp1jvwnkerk" path="res://CorruptionArea.cs" id="1_kmgf5"]
+[ext_resource type="Texture2D" uid="uid://coqmy50cy4vdu" path="res://images/noise.png" id="2_lq7ir"]
+
+[sub_resource type="Shader" id="Shader_corruption"]
+code = "shader_type spatial;
+render_mode blend_mix, cull_back, unshaded;
+render_mode depth_draw_never;
+
+uniform vec4 base_color : source_color = vec4(0.6, 0.1, 0.8, 0.45);
+uniform sampler2D noise_texture : hint_default_black;
+
+uniform float edge_softness = 0.35;
+uniform float noise_strength = 0.35;
+uniform float noise_scale = 3.0;
+uniform float noise_speed = 0.6;
+
+// Driven from C# to make the effect pulse slightly.
+uniform float u_pulse = 1.0;
+
+void fragment() {
+    // PlaneMesh UV is 0..1. Remap to -1..1 so radius=1 matches the mesh edge.
+    vec2 centered_uv = UV * 2.0 - vec2(1.0);
+    float r = length(centered_uv);
+
+    // Circular mask that is 1.0 in the center and fades out to 0.0 near radius 1.0.
+    float circle_mask = 1.0 - smoothstep(1.0 - edge_softness, 1.0, r);
+
+    // Animated noise used to break up the edge and interior.
+    float t = TIME * noise_speed;
+    vec2 noise_uv = UV * noise_scale + vec2(t, -t);
+    float n = texture(noise_texture, noise_uv).r * 2.0 - 1.0;
+
+    float wobble = 1.0 + n * noise_strength * u_pulse;
+
+    float alpha = base_color.a * circle_mask * wobble;
+    alpha = clamp(alpha, 0.0, base_color.a);
+
+    ALBEDO = base_color.rgb;
+    ALPHA = alpha;
+}"
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_corruption"]
+render_priority = 0
+shader = SubResource("Shader_corruption")
+shader_parameter/base_color = Color(0.09600001, 0.1664001, 0.8, 0.4509804)
+shader_parameter/noise_texture = ExtResource("2_lq7ir")
+shader_parameter/edge_softness = 0.25
+shader_parameter/noise_strength = 1.0
+shader_parameter/noise_scale = 1.0
+shader_parameter/noise_speed = 0.1
+shader_parameter/u_pulse = 1.0
+
+[sub_resource type="PlaneMesh" id="PlaneMesh_corruption"]
+subdivide_width = 4
+subdivide_depth = 4
+
+[node name="DebuffedArea" type="Node3D"]
+script = ExtResource("1_kmgf5")
+Color = Color(0.26999998, 1, 0.4281667, 0.6745098)
+
+[node name="Disc" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.02, 0)
+material_override = SubResource("ShaderMaterial_corruption")
+cast_shadow = 0
+mesh = SubResource("PlaneMesh_corruption")