ptarray_from_GEOSCoordSeq()

POINTARRAY* ptarray_from_GEOSCoordSeq	(	const GEOSCoordSequence *	cs,
		char	want3d
	)

Definition at line 68 of file liblwgeom/lwgeom_geos.c.

References LWDEBUG, LWDEBUGF, lwerror(), ptarray_construct(), ptarray_set_point4d(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by GEOS2LWGEOM(), and lwtin_from_geos().

{
        uint32_t dims=2;
        uint32_t size, i;
        POINTARRAY *pa;
        POINT4D point;

        LWDEBUG(2, "ptarray_fromGEOSCoordSeq called");

        if ( ! GEOSCoordSeq_getSize(cs, &size) )
                lwerror("Exception thrown");

        LWDEBUGF(4, " GEOSCoordSeq size: %d", size);

        if ( want3d )
        {
                if ( ! GEOSCoordSeq_getDimensions(cs, &dims) )
                        lwerror("Exception thrown");

                LWDEBUGF(4, " GEOSCoordSeq dimensions: %d", dims);

                /* forget higher dimensions (if any) */
                if ( dims > 3 ) dims = 3;
        }

        LWDEBUGF(4, " output dimensions: %d", dims);

        pa = ptarray_construct((dims==3), 0, size);

        for (i=0; i<size; i++)
        {
                GEOSCoordSeq_getX(cs, i, &(point.x));
                GEOSCoordSeq_getY(cs, i, &(point.y));
                if ( dims >= 3 ) GEOSCoordSeq_getZ(cs, i, &(point.z));
                ptarray_set_point4d(pa,i,&point);
        }

        return pa;
}

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