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35 lines
1.1 KiB
35 lines
1.1 KiB
#include "box_surface_area.h"
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template <typename DerivedCorner>
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IGL_INLINE typename DerivedCorner::Scalar igl::box_surface_area(
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const Eigen::MatrixBase<DerivedCorner> & min_corner,
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const Eigen::MatrixBase<DerivedCorner> & max_corner)
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{
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using Scalar = typename DerivedCorner::Scalar;
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const auto dimensions = (max_corner - min_corner).eval();
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const auto num_dimensions = dimensions.size();
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Scalar surface_area = 0;
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for (int i = 0; i < num_dimensions; ++i) {
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for (int j = i + 1; j < num_dimensions; ++j) {
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surface_area += 2 * dimensions[i] * dimensions[j];
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}
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}
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return surface_area;
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}
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template <typename Scalar, int AmbientDim>
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IGL_INLINE Scalar igl::box_surface_area(
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const Eigen::AlignedBox<Scalar,AmbientDim> & box)
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{
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return igl::box_surface_area(box.min(),box.max());
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template double igl::box_surface_area<double, 2>(Eigen::AlignedBox<double, 2> const&);
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template double igl::box_surface_area<double, 3>(Eigen::AlignedBox<double, 3> const&);
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#endif
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