lwcollection_linearize()

static LWCOLLECTION * lwcollection_linearize ( const LWCOLLECTION *  collection, double  tol, LW_LINEARIZE_TOLERANCE_TYPE  type, int  flags  )

static

Parameters

collection	input geometry collection
tol	tolerance, semantic driven by tolerance_type
tolerance_type	see LW_LINEARIZE_TOLERANCE_TYPE
flags	see flags in lwarc_linearize

Returns

a newly allocated LWCOLLECTION

Definition at line 796 of file lwstroke.c.

{
        LWCOLLECTION *ocol;
        LWGEOM *tmp;
        LWGEOM **geoms;
        uint32_t i;
 
        LWDEBUG(2, "lwcollection_linearize called.");
 
        geoms = lwalloc(sizeof(LWGEOM *)*collection->ngeoms);
 
        for (i=0; i<collection->ngeoms; i++)
        {
                tmp = collection->geoms[i];
                switch (tmp->type)
                {
                case CIRCSTRINGTYPE:
                        geoms[i] = (LWGEOM *)lwcircstring_linearize((LWCIRCSTRING *)tmp, tol, type, flags);
                        break;
                case COMPOUNDTYPE:
                        geoms[i] = (LWGEOM *)lwcompound_linearize((LWCOMPOUND *)tmp, tol, type, flags);
                        break;
                case CURVEPOLYTYPE:
                        geoms[i] = (LWGEOM *)lwcurvepoly_linearize((LWCURVEPOLY *)tmp, tol, type, flags);
                        break;
                case MULTICURVETYPE:
                case MULTISURFACETYPE:
                case COLLECTIONTYPE:
                        geoms[i] = (LWGEOM *)lwcollection_linearize((LWCOLLECTION *)tmp, tol, type, flags);
                        break;
                default:
                        geoms[i] = lwgeom_clone_deep(tmp);
                        break;
                }
        }
        ocol = lwcollection_construct(COLLECTIONTYPE, collection->srid, NULL, collection->ngeoms, geoms);
        return ocol;
}

References CIRCSTRINGTYPE, COLLECTIONTYPE, COMPOUNDTYPE, CURVEPOLYTYPE, LWCOLLECTION::geoms, lwalloc(), lwcircstring_linearize(), lwcollection_construct(), lwcollection_linearize(), lwcompound_linearize(), lwcurvepoly_linearize(), LWDEBUG, lwgeom_clone_deep(), MULTICURVETYPE, MULTISURFACETYPE, LWCOLLECTION::ngeoms, LWCOLLECTION::srid, and LWGEOM::type.

Referenced by lwcollection_linearize(), and lwcurve_linearize().

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