Adding vertex input description, readding slang

res/shaders/LegacyBasePass.slang

@@ -4,11 +4,10 @@ import MaterialParameter;
 import Scene;
 
 [shader("vertex")]
-FragmentParameter vertexMain(	
-	uint vertexId: SV_VertexID,
-	uint instanceId: SV_InstanceID,
+FragmentParameter vertexMain(
+	VertexInput input
 ){
-	InstanceData inst = pScene.instances[instanceId];
-	VertexAttributes attr = pVertexData.getAttributes(vertexId);
+	InstanceData inst = pScene.instances[input.instanceId];
+	VertexAttributes attr = pVertexData.getAttributes(input.vertexId);
 	return attr.getParameter(inst.transformMatrix);
 }

res/shaders/lib/VertexData.slang

@@ -1,5 +1,11 @@
 import MaterialParameter;
 
+struct VertexInput
+{
+	uint vertexId;
+	uint instanceId: SV_InstanceID;
+}
+
 interface IVertexData
 {
 	VertexAttributes getAttributes(uint index);