ptarray_reverse()

void ptarray_reverse

(

POINTARRAY *

pa

)

Definition at line 343 of file ptarray.c.

References getPoint_internal(), POINTARRAY::npoints, and ptarray_point_size().

Referenced by _lwt_AddFaceSplit(), _lwt_HealEdges(), lwcircstring_reverse(), lwline_reverse(), lwpoly_force_clockwise(), lwpoly_reverse(), lwtriangle_force_clockwise(), and lwtriangle_reverse().

{
        /* TODO change this to double array operations once point array is double aligned */
        POINT4D pbuf;
        uint32_t i;
        int ptsize = ptarray_point_size(pa);
        int last = pa->npoints-1;
        int mid = pa->npoints/2;

        for (i=0; i<mid; i++)
        {
                uint8_t *from, *to;
                from = getPoint_internal(pa, i);
                to = getPoint_internal(pa, (last-i));
                memcpy((uint8_t *)&pbuf, to, ptsize);
                memcpy(to, from, ptsize);
                memcpy(from, (uint8_t *)&pbuf, ptsize);
        }

}

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