From fe49e4139cd3f78f126b60ea4240a0294eac9483 Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Sat, 18 Jul 2020 10:51:38 +0200
Subject: Simulation: cleanup deduplicating attribute input nodes

---
 source/blender/functions/FN_multi_function_network.hh     | 2 ++
 source/blender/functions/intern/multi_function_network.cc | 8 ++++++++
 2 files changed, 10 insertions(+)

(limited to 'source/blender/functions')

diff --git a/source/blender/functions/FN_multi_function_network.hh b/source/blender/functions/FN_multi_function_network.hh
index e47c8260057..91eb5bb65dc 100644
--- a/source/blender/functions/FN_multi_function_network.hh
+++ b/source/blender/functions/FN_multi_function_network.hh
@@ -233,6 +233,8 @@ class MFNetwork : NonCopyable, NonMovable {
                          VectorSet<const MFOutputSocket *> &r_dummy_sockets,
                          VectorSet<const MFInputSocket *> &r_unlinked_inputs) const;
 
+  bool have_dummy_or_unlinked_dependencies(Span<const MFInputSocket *> sockets) const;
+
   std::string to_dot(Span<const MFNode *> marked_nodes = {}) const;
 };
 
diff --git a/source/blender/functions/intern/multi_function_network.cc b/source/blender/functions/intern/multi_function_network.cc
index 11c9c065f51..1d3d3a8b5f2 100644
--- a/source/blender/functions/intern/multi_function_network.cc
+++ b/source/blender/functions/intern/multi_function_network.cc
@@ -269,6 +269,14 @@ void MFNetwork::find_dependencies(Span<const MFInputSocket *> sockets,
   }
 }
 
+bool MFNetwork::have_dummy_or_unlinked_dependencies(Span<const MFInputSocket *> sockets) const
+{
+  VectorSet<const MFOutputSocket *> dummy_sockets;
+  VectorSet<const MFInputSocket *> unlinked_inputs;
+  this->find_dependencies(sockets, dummy_sockets, unlinked_inputs);
+  return dummy_sockets.size() + unlinked_inputs.size() > 0;
+}
+
 std::string MFNetwork::to_dot(Span<const MFNode *> marked_nodes) const
 {
   dot::DirectedGraph digraph;
-- 
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