lwline_is_trajectory()

int lwline_is_trajectory ( const LWLINE *  geom )

extern

Definition at line 454 of file lwline.c.

{
        if (!FLAGS_GET_M(line->flags))
        {
                lwnotice("Line does not have M dimension");
                return LW_FALSE;
        }
 
        uint32_t n = line->points->npoints;
 
        if (n < 2)
                return LW_TRUE; /* empty or single-point are "good" */
 
        double m = -1 * FLT_MAX;
        for (uint32_t i = 0; i < n; ++i)
        {
                POINT3DM p;
                if (!getPoint3dm_p(line->points, i, &p))
                        return LW_FALSE;
                if (p.m <= m)
                {
                        lwnotice(
                            "Measure of vertex %d (%g) not bigger than measure of vertex %d (%g)", i, p.m, i - 1, m);
                        return LW_FALSE;
                }
                m = p.m;
        }
 
        return LW_TRUE;
}

References LWLINE::flags, FLAGS_GET_M, getPoint3dm_p(), LW_FALSE, LW_TRUE, lwnotice(), POINT3DM::m, POINTARRAY::npoints, and LWLINE::points.

Referenced by lwgeom_is_trajectory().

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