ptarray_calculate_gbox_cartesian()

int ptarray_calculate_gbox_cartesian ( const POINTARRAY *  pa, GBOX *  gbox  )

extern

Calculate box (x/y) and add values to gbox.

Return LW_SUCCESS on success.

Definition at line 601 of file gbox.c.

{
        if (!pa || pa->npoints == 0)
                return LW_FAILURE;
        if (!gbox)
                return LW_FAILURE;
 
        int has_z = FLAGS_GET_Z(pa->flags);
        int has_m = FLAGS_GET_M(pa->flags);
        gbox->flags = lwflags(has_z, has_m, 0);
        LWDEBUGF(4, "ptarray_calculate_gbox Z: %d M: %d", has_z, has_m);
        int coordinates = 2 + has_z + has_m;
 
        switch (coordinates)
        {
        case 2:
        {
                ptarray_calculate_gbox_cartesian_2d(pa, gbox);
                break;
        }
        case 3:
        {
                if (has_z)
                {
                        ptarray_calculate_gbox_cartesian_3d(pa, gbox);
                }
                else
                {
                        double zmin = gbox->zmin;
                        double zmax = gbox->zmax;
                        ptarray_calculate_gbox_cartesian_3d(pa, gbox);
                        gbox->mmin = gbox->zmin;
                        gbox->mmax = gbox->zmax;
                        gbox->zmin = zmin;
                        gbox->zmax = zmax;
                }
                break;
        }
        default:
        {
                ptarray_calculate_gbox_cartesian_4d(pa, gbox);
                break;
        }
        }
        return LW_SUCCESS;
}

References GBOX::flags, POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, LW_FAILURE, LW_SUCCESS, LWDEBUGF, lwflags(), GBOX::mmax, GBOX::mmin, POINTARRAY::npoints, ptarray_calculate_gbox_cartesian_2d(), ptarray_calculate_gbox_cartesian_3d(), ptarray_calculate_gbox_cartesian_4d(), GBOX::zmax, and GBOX::zmin.

Referenced by LWGEOM_interiorringn_polygon(), lwline_calculate_gbox_cartesian(), lwpoint_calculate_gbox_cartesian(), lwpoly_calculate_gbox_cartesian(), and lwtriangle_calculate_gbox_cartesian().

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