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36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
#ifndef IGL_EDGES_TO_PATH_H
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#define IGL_EDGES_TO_PATH_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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// EDGES_TO_PATH Given a set of undirected, unique edges such that all form a
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// single connected compoent with exactly 0 or 2 nodes with valence =1,
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// determine the/a path visiting all nodes.
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//
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// Inputs:
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// E #E by 2 list of undirected edges
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// Outputs:
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// I #E+1 list of nodes in order tracing the chain (loop), if the output
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// is a loop then I(1) == I(end)
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// J #I-1 list of indices into E of edges tracing I
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// K #I-1 list of indices into columns of E {1,2} so that K(i) means that
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// E(i,K(i)) comes before the other (i.e., E(i,3-K(i)) ). This means that
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// I(i) == E(J(i),K(i)) for i<#I, or
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// I == E(sub2ind(size(E),J([1:end end]),[K;3-K(end)]))))
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//
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template <
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typename DerivedE,
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typename DerivedI,
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typename DerivedJ,
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typename DerivedK>
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IGL_INLINE void edges_to_path(
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const Eigen::MatrixBase<DerivedE> & E,
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Eigen::PlainObjectBase<DerivedI> & I,
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Eigen::PlainObjectBase<DerivedJ> & J,
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Eigen::PlainObjectBase<DerivedK> & K);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "edges_to_path.cpp"
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#endif
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#endif
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