Node coordinates
Node coordinates are described in the name.i1 file using one or more XY batches:
XY C IN$_1$ $x_{\mathtt{IN}_1}$ $y_{\mathtt{IN}_1}$ $z_{\mathtt{IN}_1}$ $\dots$ C IN$_n$ $x_{\mathtt{IN}_n}$ $y_{\mathtt{IN}_n}$ $z_{\mathtt{IN}_n}$
or
XY N IN$_1$ $\dots$ IN$_n$ X $x_{\mathtt{IN}_1}$ $\dots$ $x_{\mathtt{IN}_n}$ Y $y_{\mathtt{IN}_1}$ $\dots$ $y_{\mathtt{IN}_n}$ Z $z_{\mathtt{IN}_1}$ $\dots$ $z_{\mathtt{IN}_n}$
The first batch form is used to write the coordinates of $n$ nodes by rows. Each node corresponds to one C group.
The second batch form is used to write the coordinates of $n$ nodes by columns. In this case, the compact data notation can easily be used, see the Reference Manual.
Both forms of batches can be combined freely; nodes may be defined in any order within a single batch, and node definitions may be repeated. A coordinate specified later overwrites one specified earlier. Midside nodes do not need to be written if they lie on a straight edge; if the coordinates of such nodes are missing, the program automatically calculates them by linear interpolation from the adjacent corner nodes. The coordinates are automatically multiplied by the $\mathtt{SCALE}$ scale factor; for example, the value $\mathtt{SCALE}=0.001$ means that all coordinates are given in millimeters.
| $\mathtt{IN}_i$ | The number of the $i$-th node, $1\le\mathtt{IN}_i\le{}$$\mathtt{NNOD}$. | |
|---|---|---|
| $x_{\mathtt{IN}_i},y_{\mathtt{IN}_i},z_{\mathtt{IN}_i}$ | The coordinates of the $i$-th node in the global Cartesian coordinate system. In 2D problems, the $z$ coordinate is not written. | |
Note
The XY batch can have any number of continuation lines. Data are written from column 3 to column 72 (the first two columns are generally reserved for two-letter batch names), see the Reference Manual.