Calculates triangles' centroids, areas, and heights from vertices

Usage

init_edges_cpp(triplets, pts, tris)

Arguments

triplets: A M-by-3 matrix with indices for the points that correspond each triangle's vertices, where M is the number of triangles.
pts: A N-by-2 matrix with indices for the X,Y coordinates of each point.
tris: A M-by-4 matrix containing the X,Y coordinates of each triangle's centroid in the first two columns, and area and largest height of each triangle in the last two columns.

Value

A E-by-14 matrix with columns from_pt, to_pt, from_tri, to_tri, x0_pt, x1_pt, y0_pt, y1_pt, x0_tri, x1_tri, y0_tri, y1_tri, length_pt, length_tri. If only one triangle uses an edge, then the from_tri, x0_tri, and y0_tri fields will contain NaN values.

Note that indices that reference the pts and tris tables are 1-indexed.