My first 3D game with Godot 4.4

player/projectile/projectile.gdshader

@@ -0,0 +1,14 @@
+shader_type spatial;
+render_mode ambient_light_disabled, shadows_disabled, unshaded;
+
+uniform vec3 tail_color : source_color;
+uniform vec3 head_color : source_color;
+
+void vertex() {
+	float def = sin(UV.y * 2.0 * PI - TIME * 20.0) + 1.0 / 2.0;
+	VERTEX.xz += NORMAL.xz * def * 0.05 * UV.y * COLOR.x;
+}
+
+void fragment() {
+	ALBEDO = mix(head_color, tail_color, COLOR.x);
+}