From 1070acf0be7f46b649c86d54e4f31c813b99ad90 Mon Sep 17 00:00:00 2001
From: Marc Gilleron <marc.gilleron@gmail.com>
Date: Tue, 23 Apr 2019 00:14:20 +0100
Subject: [PATCH] Count re-used vertices

---
 dmc/mesh_builder.cpp | 1 +
 dmc/mesh_builder.h   | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/dmc/mesh_builder.cpp b/dmc/mesh_builder.cpp
index d3d57e6..fb1332e 100644
--- a/dmc/mesh_builder.cpp
+++ b/dmc/mesh_builder.cpp
@@ -58,6 +58,7 @@ void MeshBuilder::clear() {
 	_normals.clear();
 	_indices.clear();
 	_position_to_index.clear();
+	_reused_vertices = 0;
 }
 
 } // namespace dmc
diff --git a/dmc/mesh_builder.h b/dmc/mesh_builder.h
index 48727ab..25c159c 100644
--- a/dmc/mesh_builder.h
+++ b/dmc/mesh_builder.h
@@ -11,14 +11,17 @@ namespace dmc {
 // Faster than SurfaceTool, only does what is needed to build a smooth mesh
 class MeshBuilder {
 public:
+	MeshBuilder() :
+			_reused_vertices(0) {}
+
 	inline void add_vertex(Vector3 position, Vector3 normal) {
 
 		int i = 0;
 
-		// TODO Debug this to see if it's effectively indexing
 		if (_position_to_index.find(position) != _position_to_index.end()) {
 
 			i = _position_to_index[position];
+			++_reused_vertices;
 
 		} else {
 
@@ -35,11 +38,14 @@ public:
 	Ref<ArrayMesh> commit(bool wireframe);
 	void clear();
 
+	int get_reused_vertex_count() const { return _reused_vertices; }
+
 private:
 	std::vector<Vector3> _positions;
 	std::vector<Vector3> _normals;
 	std::vector<int> _indices;
 	std::map<Vector3, int> _position_to_index;
+	int _reused_vertices;
 };
 
 } // namespace dmc