An Automatic Isotropic Triangular Grid Generation Technique Based on an Artificial Neural Network and an Advancing Front Method

Algorithm 1

Training data extraction algorithm.

(1)	: Initialize: Import the data file generated by some mature mesh generation software.
(2)	: for i = 1 to N; N is the number of edges.
(3)	:  Find the vertex of a triangle according to the right-hand's rule of Edge i.
(4)	:  Find the left and right immediate adjacent points of Edge i.
(5)	:  If: the left adjacent point is the vertex of a triangle, then the mode is 2, as shown in Figure 7.
(6)	:  Elif: the right adjacent point is the vertex of a triangle, then the mode is 3, as shown in Figure 7.
(7)	:  Else: the mode is 1, as shown in Figure 7.
(8)	:  Store data of coordinates with the corresponding mode.
(9)	: end for