recti-linear (
curvi-linear) input grid: with this option the user indicates that the x. and y.component (dzeta and eta.component) are to be read from one and the same file (with one READINP command). With this option SWAN reads first all x.components (dzeta components), and then all y.components (eta.components) (see below).
The first component (x. or dzeta.component) is always eastward oriented and the second one (y. or eta.component) is always northwise oriented. The components dzeta and eta are taken along the directions of the grid lines of the curvi-linear grid!
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