lwgeom_scale()

void lwgeom_scale	(	LWGEOM *	geom,
		const POINT4D *	factor
	)

Definition at line 2137 of file lwgeom.c.

{
        int type = geom->type;
        uint32_t i;
 
        switch(type)
        {
                /* Take advantage of fact that pt/ln/circ/tri have same memory structure */
                case POINTTYPE:
                case LINETYPE:
                case CIRCSTRINGTYPE:
                case TRIANGLETYPE:
                {
                        LWLINE *l = (LWLINE*)geom;
                        ptarray_scale(l->points, factor);
                        break;
                }
                case POLYGONTYPE:
                {
                        LWPOLY *p = (LWPOLY*)geom;
                        for( i = 0; i < p->nrings; i++ )
                                ptarray_scale(p->rings[i], factor);
                        break;
                }
                case CURVEPOLYTYPE:
                {
                        LWCURVEPOLY *c = (LWCURVEPOLY*)geom;
                        for( i = 0; i < c->nrings; i++ )
                                lwgeom_scale(c->rings[i], factor);
                        break;
                }
                default:
                {
                        if( lwgeom_is_collection(geom) )
                        {
                                LWCOLLECTION *c = (LWCOLLECTION*)geom;
                                for( i = 0; i < c->ngeoms; i++ )
                                {
                                        lwgeom_scale(c->geoms[i], factor);
                                }
                        }
                        else
                        {
                                lwerror("lwgeom_scale: unable to handle type '%s'", lwtype_name(type));
                        }
                }
        }
 
        /* Recompute bbox if needed */
        if (geom->bbox)
                lwgeom_refresh_bbox(geom);
}

References LWGEOM::bbox, CIRCSTRINGTYPE, CURVEPOLYTYPE, LWCOLLECTION::geoms, LINETYPE, lwerror(), lwgeom_is_collection(), lwgeom_refresh_bbox(), lwgeom_scale(), lwtype_name(), LWCOLLECTION::ngeoms, LWPOLY::nrings, LWCURVEPOLY::nrings, LWLINE::points, POINTTYPE, POLYGONTYPE, ptarray_scale(), LWPOLY::rings, LWCURVEPOLY::rings, TRIANGLETYPE, and LWGEOM::type.

Referenced by lwgeom_scale(), ST_Scale(), and test_lwgeom_scale().

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