Merge GudhUI, a UI for gudhi based on Qt

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/trunk@427 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 17fedd974f14a8225b27d94361e835964eeb5cba

1 files changed, 68 insertions, 0 deletions

diff --git a/src/GudhUI/utils/Edge_contractor.h b/src/GudhUI/utils/Edge_contractor.h
new file mode 100644
index 00000000..c7a86e0b
--- /dev/null
+++ b/src/GudhUI/utils/Edge_contractor.h
@@ -0,0 +1,68 @@
+/*
+ * Contractor.h
+ *
+ *  Created on: Sep 25, 2014
+ *      Author: dsalinas
+ */
+
+#ifndef EDGE_CONTRACTOR_H_
+#define EDGE_CONTRACTOR_H_
+
+
+#include "gudhi/Skeleton_blocker_contractor.h"
+
+#include "gudhi/Contraction/Edge_profile.h"
+#include "gudhi/Contraction/policies/Cost_policy.h"
+
+
+/**
+ * Iteratively puts every vertex at the center of its neighbors
+ */
+template<typename SkBlComplex> class Edge_contractor{
+private:
+	SkBlComplex& complex_;
+	unsigned num_contractions_;
+
+	/**
+	 * @brief return a cost corresponding to the squared length of the edge
+	 */
+	template< typename EdgeProfile> class Length_cost : public contraction::Cost_policy<EdgeProfile>{
+	public:
+		typedef typename contraction::Cost_policy<EdgeProfile>::Cost_type Cost_type;
+		typedef typename EdgeProfile::Point Point;
+		Cost_type operator()(const EdgeProfile& profile, const boost::optional<Point>& placement) const override{
+			Cost_type res;
+			if(!placement) return res;
+			return Geometry_trait::Squared_distance_d()(profile.p0(),profile.p1()); //not working??
+		}
+	};
+
+	public:
+	typedef typename SkBlComplex::Vertex_handle Vertex_handle;
+	typedef typename SkBlComplex::Edge_handle Edge_handle;
+
+	/**
+	 * @brief Modify complex to be the expansion of the k-nearest neighbor
+	 * symetric graph.
+	 */
+	Edge_contractor(SkBlComplex& complex,unsigned num_contractions):
+		complex_(complex),num_contractions_(num_contractions)
+	{
+		typedef typename contraction::Edge_profile<Complex> Profile;
+		num_contractions = (std::min)((int)num_contractions,(int)(complex_.num_vertices()-1));
+		contraction::Skeleton_blocker_contractor<Complex> contractor(
+				complex_,
+				new Length_cost<contraction::Edge_profile<Complex>>(),
+				contraction::make_first_vertex_placement<Profile>(),
+				contraction::make_link_valid_contraction<Profile>(),
+				contraction::make_remove_popable_blockers_visitor<Profile>()
+		);
+		contractor.contract_edges(num_contractions);
+	}
+
+
+};
+
+
+
+#endif /* EDGE_CONTRACTOR_H_ */