API documentation

startinpy does not have specific classes and/or objects for points, vertices, and triangles. numpy arrays of floats and integers are used.

A Point is an array of 3 float (x-coordinate, y-coordinate, z-coordinate).

>>> import startinpy
>>> dt = startinpy.DT()
>>> dt.insert_one_pt(11.3, 22.2, 4.7)
>>> dt.points[1]
array([11.3, 22.2, 4.7])

A Vertex is an integer, it is the index in the array of points (startinpy.DT.points(), which is 0-based).

A Triangle is an array of 3 integer, the values of the indices of the 3 vertices (ordered counter-clockwise) in the array of points (startinpy.DT.points(), which is 0-based).

>>> dt.triangles[2]
array([1, 3, 2], dtype=uint64)
>>> #-- z-coordinate of 3rd vertex of the same triangle
>>> dt.points[dt.triangles[2][2]][2]
3.3

Important

The first vertex in the list of points is the infinite vertex, and has no coordinates (it has this: [-99999.99999, -99999.99999, -99999.99999]). It is used internally to ensure that the whole DT is consitant. No Triangle refers to the vertex.