Fig. 5

Signed distance computation in the region of an acute corner. The grid point \(\varvec{x}_K\) has the vertex B as closest point on the surface, but it lies on opposing sides with respect to the adjacent surface elements \(\sigma _1\) and \(\sigma _2\); based on the larger distance to the tangent planes of the surface elements \(\sigma _i\), the element \(\sigma _2\) is chosen to determine the outside position of the point \(\varvec{x}_K\)