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barycentric coordinate calculation correction #12

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barycentric coordinate calculation correction #12

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15 changes: 8 additions & 7 deletions include/sdf/sdf.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -92,16 +92,17 @@ Eigen::Matrix<T, 1, 3, Eigen::RowMajor> bary(
const Eigen::Ref<const Eigen::Matrix<T, 1, 3, Eigen::RowMajor>>& c,
const Eigen::Ref<const Eigen::Matrix<T, 1, 3, Eigen::RowMajor>>& normal,
float area_abc) {
float area_pbc = normal.dot((b - p).cross(c - p));
float area_pca = normal.dot((c - p).cross(a - p));

Eigen::Matrix<T, 1, 3> u = b - a;
Eigen::Matrix<T, 1, 3> v = c - a;
Eigen::Matrix<T, 1, 3> w = p - a;
Eigen::Matrix<T, 1, 3> n = normal;
Eigen::Matrix<T, 1, 3> uvw;
uvw.x() = area_pbc / area_abc;
uvw.y() = area_pca / area_abc;
uvw.z() = T(1.0) - uvw.x() - uvw.y();
uvw[2] = u.cross(w).dot(n) / (area_abc + T(1e-5));
uvw[1] = w.cross(v).dot(n) / (area_abc + T(1e-5));
uvw[0] = T(1.0) - uvw[1] - uvw[2];

return uvw;
}
return uvw;}

template <class T>
// 3D point to triangle shortest distance SQUARED
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