Reorganize assets

assets/assets_windows/shaders/directx/SceneVS.hlsl

@@ -0,0 +1,22 @@
+struct PS_INPUT
+{
+	float4 pos : SV_POSITION;
+	float2 tex : TEXCOORD;
+};
+
+PS_INPUT main_vs(uint vI : SV_VERTEXID)
+{
+	float idHigh = float(vI >> 1);
+	float idLow = float(vI & uint(1));
+
+	float x = idHigh * 4.0 - 1.0;
+	float y = idLow * 4.0 - 1.0;
+
+	float u = idHigh * 2.0;
+	float v = 1.0 - idLow * 2.0;
+
+	PS_INPUT vert_out;
+	vert_out.pos = float4(x, y, 0.0, 1.0);
+	vert_out.tex = float2(u, v);
+	return vert_out;
+}