Extracting contour lines from a hierarchical surface model


The Hierarchical Triangulated Irregular Network (HTIN) is a structure for representing 2½-dimensional surfaces at different levels of detail through piecewise-linear approximations based on triangulations of the surface domain. In this paper, we present two algorithms that allow extracting a representation of the surface and contour lines at a given level of detail, directly from the HTIN.

Computer Graphics Forum