# Synopsis

PDX_MSGT igeo_GetContinuous128(long option, MDA_PTR db_ptr, double *cont_toler, int cont_deg, EAM_STACK *stack, int model, long *num_of_cont_128, MDA_PTR **db_ptrs_128)

# Purpose

Get the set of continuous IGES NURBS surfaces (128)

# Description

Gets the set of continuous IGES NURBS surfaces that are continuous to degree cont_deg within cont_toler. If the num_of_cont_128 is equal to zero(0) than the original IGES NURBS surface was continuous everywhere to degree cont_deg and within cont_toler tolerance. The IGES NURBS surface entity must be a valid IGES definition.

# Input

## option

### IGEO_GTEST

Test for G continuity for derivatives to 2

### IGES_NOMATRIX

Do Not apply entity matrix to data

## db_ptr

The IGES 128 entity database pointer.

## cont_toler

The continuity tolerance. The distance between the derivatives must be less then or equal this value to have derivative continuity .nf [0] = Model Space Distance (G0) [1] = Radian angular difference (G1) [2] = Curvature difference (G2) [3] = Normalized derivative difference .fi

## cont_deg

The degree of continuity desired

## stack

The entity attribute stack

## model

The model where the new continuous IGES 128 entities are created

# Output

## num_of_cont_128

The number of continuous 128 entities

## db_ptrs_128

The continuous 128 entity database pointers

# Tolerances

          NORMAL_MAG_TOL
          ZERO_TOL
          MODEL_SPACE_PNT_TOL
          .fi

# Return

          IGEO_NOERR
          Low level error return
          .fi