lwtriangle_from_lwline()

LWTRIANGLE * lwtriangle_from_lwline

(

const LWLINE *

shell

)

Definition at line 153 of file lwtriangle.c.

{
        LWTRIANGLE *ret;
        POINTARRAY *pa;
 
        if ( shell->points->npoints != 4 )
                lwerror("lwtriangle_from_lwline: shell must have exactly 4 points");
 
        if (   (!FLAGS_GET_Z(shell->flags) && !ptarray_is_closed_2d(shell->points)) ||
                (FLAGS_GET_Z(shell->flags) && !ptarray_is_closed_3d(shell->points)) )
                lwerror("lwtriangle_from_lwline: shell must be closed");
 
        pa = ptarray_clone_deep(shell->points);
        ret = lwtriangle_construct(shell->srid, NULL, pa);
 
        if (lwtriangle_is_repeated_points(ret))
                lwerror("lwtriangle_from_lwline: some points are repeated in triangle");
 
        return ret;
}

References LWLINE::flags, FLAGS_GET_Z, lwerror(), lwtriangle_construct(), lwtriangle_is_repeated_points(), POINTARRAY::npoints, LWLINE::points, ptarray_clone_deep(), ptarray_is_closed_2d(), ptarray_is_closed_3d(), and LWLINE::srid.

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