27 lines
943 B
C++
27 lines
943 B
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2016 Alec Jacobson <alecjacobson@gmail.com>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public License
|
|
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
|
// obtain one at http://mozilla.org/MPL/2.0/.
|
|
#include "circumradius.h"
|
|
#include "edge_lengths.h"
|
|
#include "doublearea.h"
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedR>
|
|
IGL_INLINE void igl::circumradius(
|
|
const Eigen::PlainObjectBase<DerivedV> & V,
|
|
const Eigen::PlainObjectBase<DerivedF> & F,
|
|
Eigen::PlainObjectBase<DerivedR> & R)
|
|
{
|
|
Eigen::Matrix<typename DerivedV::Scalar,Eigen::Dynamic,3> l;
|
|
igl::edge_lengths(V,F,l);
|
|
DerivedR A;
|
|
igl::doublearea(l,0.,A);
|
|
// use formula: R=abc/(4*area) to compute the circum radius
|
|
R = l.col(0).array() * l.col(1).array() * l.col(2).array() / (2.0*A.array());
|
|
}
|