ptarray_from_GEOSCoordSeq()

POINTARRAY * ptarray_from_GEOSCoordSeq	(	const GEOSCoordSequence *	cs,
		uint8_t	want3d
	)

Definition at line 144 of file liblwgeom/lwgeom_geos.c.

{
        uint32_t dims = 2;
        POINTARRAY* pa;
        uint32_t size = 0;
#if POSTGIS_GEOS_VERSION < 31000
        uint32_t i;
        POINT4D point = { 0.0, 0.0, 0.0, 0.0 };
#endif
 
        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);
#if POSTGIS_GEOS_VERSION >= 31000
        GEOSCoordSeq_copyToBuffer(cs, (double*) pa->serialized_pointlist, (dims == 3), 0);
        return pa;
#else
        for (i = 0; i < size; i++)
        {
                if (dims >= 3)
                        GEOSCoordSeq_getXYZ(cs, i, &(point.x), &(point.y), &(point.z));
                else
                        GEOSCoordSeq_getXY(cs, i, &(point.x), &(point.y));
 
                ptarray_set_point4d(pa, i, &point);
        }
 
        return pa;
#endif
}

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

Referenced by GEOS2LWGEOM(), and lwtin_from_geos().

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