Triangulate3D

DESCRIPTION

What this program does is to incrementally create the Delauney graph of a given set of sites. The Delauney graph consists of all tetrahedrons of the Delauney diagram, with two tetrahedrons being linked together if they share a common triangle. In this implementation we use the concept of "infinite tetrahedrons", being the "convex hull" of a triangle on the convex hull of the sites together with the point at infinity.

This code is a replacement for previous versions of Triangulate3D (IRIS Explorer release 3.0 and previous). It shares an engine with Triangulate2D, and it now produces a correct triangulation of regular data.

The engine is an incremental point-insertion algorithm. This is ideally O(n log n) but may be up to O(n²) depending on the distribution of points.

The effect of the jitter widget has been removed as it is no longer necessary.

INPUTS

Port: Input Data
Type: Lattice
Constraints: curvilinear
Constraints: 3-cD
The input lattice of curvilinear points to be triangulated.

WIDGETS

Port: jitter
Type: Radio Box
Menu Item: Actual data
Menu Item: Add jitter to data
This widget does nothing but is retained for compatibility with previous releases.

OUTPUTS

Port: Output Pyramid
Type: Pyramid
Constraints: 3-layer
Constraints: 1..-baseLat
Constraints: 3-D compression
Constraints: unique-compression type
The resultant pyramid of tetrahedras.

KNOWN PROBLEMS