Initial commit.

Assets/UI/LoadingThrobber/circular_throbber.gdshader

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+shader_type canvas_item;
+
+uniform vec4 color = vec4(1.0f, 1.0f, 1.0f, 1.0f);
+uniform float thickness = 0.1f;
+uniform float rotation_speed = 1.0f;
+
+vec2 rotate(vec2 v, float angle) {
+	return vec2(
+		v.x * cos(angle) + v.y * sin(angle),
+		v.x * sin(angle) - v.y * cos(angle)
+	);
+}
+
+void fragment() {
+	float distance_from_centre = distance(vec2(0.5f, 0.5f), UV.xy) * 2.0f;
+	float inner_circle = smoothstep((1.0f - (SCREEN_PIXEL_SIZE.x * 96.0f)) - thickness, 1.0f - thickness, distance_from_centre);
+	float outer_circle = 1.0f - smoothstep((1.0f - (SCREEN_PIXEL_SIZE.x * 96.0f)), 1.0f, distance_from_centre);
+	float throbber_edge = outer_circle * inner_circle;
+
+	vec2 relative = rotate(UV - vec2(0.5f, 0.5f), TIME * rotation_speed);
+	float angle = atan(relative.x, relative.y);
+
+	float t = (angle + PI) / 2.0f / PI;
+	COLOR *= throbber_edge * mix(vec4(color.rgb, 0.0f), vec4(color.rgb, 1.0f), t);
+}

Assets/UI/LoadingThrobber/circular_throbber.gdshader.uid

@@ -0,0 +1 @@
+uid://cdsno15e4ik28

Assets/UI/LoadingThrobber/circular_throbber.tscn

@@ -0,0 +1,18 @@
+[gd_scene format=3 uid="uid://ccy6uvk0tjnsn"]
+
+[ext_resource type="Material" uid="uid://dqjre1mbrfp6c" path="res://Assets/UI/LoadingThrobber/circular_throbber.material" id="1_o3q45"]
+
+[node name="CircularThrobber" type="AspectRatioContainer" unique_id=1517631718]
+material = ExtResource("1_o3q45")
+custom_minimum_size = Vector2(48, 48)
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_right = -1232.0
+offset_bottom = -672.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="ColorRect" type="ColorRect" parent="." unique_id=1757903595]
+material = ExtResource("1_o3q45")
+layout_mode = 2