56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_BOUNDARY_CONDITIONS_H
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#define IGL_BOUNDARY_CONDITIONS_H
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#include "igl_inline.h"
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#include <Eigen/Dense>
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namespace igl
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{
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// Compute boundary conditions for automatic weights computation. This
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// function expects that the given mesh (V,Ele) has sufficient samples
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// (vertices) exactly at point handle locations and exactly along bone and
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// cage edges.
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//
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// Inputs:
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// V #V by dim list of domain vertices
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// Ele #Ele by simplex-size list of simplex indices
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// C #C by dim list of handle positions
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// P #P by 1 list of point handle indices into C
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// BE #BE by 2 list of bone edge indices into C
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// CE #CE by 2 list of cage edge indices into *P*
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// Outputs:
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// b #b list of boundary indices (indices into V of vertices which have
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// known, fixed values)
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// bc #b by #weights list of known/fixed values for boundary vertices
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// (notice the #b != #weights in general because #b will include all the
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// intermediary samples along each bone, etc.. The ordering of the
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// weights corresponds to [P;BE]
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// Returns false if boundary conditions are suspicious:
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// P and BE are empty
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// bc is empty
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// some column of bc doesn't have a 0 (assuming bc has >1 columns)
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// some column of bc doesn't have a 1 (assuming bc has >1 columns)
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IGL_INLINE bool boundary_conditions(
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const Eigen::MatrixXd & V,
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const Eigen::MatrixXi & Ele,
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const Eigen::MatrixXd & C,
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const Eigen::VectorXi & P,
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const Eigen::MatrixXi & BE,
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const Eigen::MatrixXi & CE,
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Eigen::VectorXi & b,
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Eigen::MatrixXd & bc);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "boundary_conditions.cpp"
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#endif
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#endif
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