50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
#ifndef IGL_RAMER_DOUGLAS_PEUCKER_H
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#define IGL_RAMER_DOUGLAS_PEUCKER_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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// Ramer-Douglas-Peucker piecewise-linear curve simplification.
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//
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// Inputs:
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// P #P by dim ordered list of vertices along the curve
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// tol tolerance (maximal euclidean distance allowed between the new line
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// and a vertex)
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// Outputs:
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// S #S by dim ordered list of points along the curve
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// J #S list of indices into P so that S = P(J,:)
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template <typename DerivedP, typename DerivedS, typename DerivedJ>
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IGL_INLINE void ramer_douglas_peucker(
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const Eigen::MatrixBase<DerivedP> & P,
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const typename DerivedP::Scalar tol,
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Eigen::PlainObjectBase<DerivedS> & S,
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Eigen::PlainObjectBase<DerivedJ> & J);
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// Run (Ramer-)Duglass-Peucker curve simplification but keep track of where
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// every point on the original curve maps to on the simplified curve.
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//
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// Inputs:
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// P #P by dim list of points, (use P([1:end 1],:) for loops)
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// tol DP tolerance
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// Outputs:
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// S #S by dim list of points along simplified curve
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// J #S indices into P of simplified points
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// Q #P by dim list of points mapping along simplified curve
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//
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template <
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typename DerivedP,
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typename DerivedS,
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typename DerivedJ,
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typename DerivedQ>
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IGL_INLINE void ramer_douglas_peucker(
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const Eigen::MatrixBase<DerivedP> & P,
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const typename DerivedP::Scalar tol,
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Eigen::PlainObjectBase<DerivedS> & S,
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Eigen::PlainObjectBase<DerivedJ> & J,
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Eigen::PlainObjectBase<DerivedQ> & Q);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "ramer_douglas_peucker.cpp"
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#endif
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#endif
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