# Synopsis

PDX_MSGT dxcr_Spline(long option, MDA_PTR orig_db_ptr, int degree, int sflag, int num_knots, int num_cpts, double *knots, double *cpts, double *weights, int dxf_model, MDA_PTR *dxf_db_ptr)

# Purpose

Creates a DXF spline.

# Description

Creates a DXF spline entity in the specified model based on data provided. The data provided must result in a valid definition.

The orig_db_ptr argument should contain the database pointer of the entity that the new entity was created from (usually this should be obtained by the calling routine via mda_GetOrigDbptr) or MDA_NULL_PTR. See the mda_intro man page for more information about predecessor entities.

# Input

## option

Options (not used)

## orig_db_ptr

The database pointer of the originating entity

## degree

The degree of the curve

## sflag

Flag indicating closure, periodicity, rationality, planarity

## num_knots

Number of knots

## num_cpts

Number of control points

## knots

Knot vector

## cpts

Control points[x0,y0,z0,w0,x1,...w(n-1)]

## weights

Weights[0,1,...(n-1)]

## dxf_model

The model for creating the DXF entity or entities

# Output

## dxf_db_ptr

The database pointer of the resulting DXF entity

# Return

          DXCR_NOERR
          Low level error return
          .fi