update

shader/skirt.vert

@@ -0,0 +1,18 @@
+#version 330 core
+
+layout(location=0) in vec3 aPos;
+layout(location=1) in vec3 aNormal;
+layout(location=2) in vec2 aUV;
+
+out vec3 vNormal;
+out vec3 vWorldPos;
+out vec2 vUV;
+
+uniform mat4 uMVP;
+
+void main() {
+    vWorldPos = aPos;
+    vNormal = aNormal;
+    vUV = aUV;
+    gl_Position = uMVP * vec4(aPos, 1.0);
+}