circstring_from_pa()

static LWGEOM* circstring_from_pa ( const POINTARRAY *  pa, int  srid, int  start, int  end  )

static

Definition at line 857 of file lwstroke.c.

References getPoint4d_p(), lwcircstring_as_lwgeom(), lwcircstring_construct(), LWDEBUGF, ptarray_construct(), ptarray_has_m(), ptarray_has_z(), and ptarray_set_point4d().

Referenced by geom_from_pa().

{

        POINT4D p0, p1, p2;
        POINTARRAY *pao = ptarray_construct(ptarray_has_z(pa), ptarray_has_m(pa), 3);
        LWDEBUGF(4, "srid=%d, start=%d, end=%d", srid, start, end);
        getPoint4d_p(pa, start, &p0);
        ptarray_set_point4d(pao, 0, &p0);
        getPoint4d_p(pa, (start+end+1)/2, &p1);
        ptarray_set_point4d(pao, 1, &p1);
        getPoint4d_p(pa, end+1, &p2);
        ptarray_set_point4d(pao, 2, &p2);
        return lwcircstring_as_lwgeom(lwcircstring_construct(srid, NULL, pao));
}

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