# TK_NURBS_Curve

## Functions

| `TK_NURBS_Curve`
| `~TK_NURBS_Curve`
`TK_Status` | `Read`
`TK_Status` | `Write`
`TK_Status` | `Clone`
`TK_Status` | `ReadAscii`
`TK_Status` | `WriteAscii`
void | `Reset`
void | `SetCurve`
void | `SetDCurve`
float const * | `GetPoints`
float * | `GetPoints`
double const * | `GetDPoints`
double * | `GetDPoints`
int | `GetDegree`
int | `GetCount`
float const * | `GetWeights`
float * | `GetWeights`
float const * | `GetKnots`
float * | `GetKnots`
void | `SetStart`
float | `GetStart`
void | `SetEnd`
float | `GetEnd`
void | `SetOptions`
int | `GetOptions`

## Detailed Description

class `TK_NURBS_Curve` : public BBaseOpcodeHandler

  Handles the TKE_NURBS_Curve opcode.

  TK_NURBS_Curve provides support for writing/reading the TKE_NURBS_Curve opcode object to/from an HSF file.

  The HOOPS/3dGS scene-graph supports NURBS curve primitives

  Public Functions

  `TK_NURBS_Curve`()
  `~TK_NURBS_Curve`()
  virtual TK_Status `Read`(BStreamFileToolkit &tk)

    Reads data from the toolkit buffer, decodes/decompresses it, and maps it to the opcode handlers data members. User-defined classes which need to write out custom data should utilize one of the available GetData() methods.

    Parameters: | tk – A reference to the BStreamFileToolkit object.
    Returns: | The result of the function call.

  virtual TK_Status `Write`(BStreamFileToolkit &tk)

    Encodes/compresses data and writes data to the toolkit buffer. User-defined classes which need to write out custom data should utilize one of the available PutData() methods, and first write out the opcode associated with the group of binary data followed by the data itself.

    Parameters: | tk – A reference to the BStreamFileToolkit object.
    Returns: | The result of the function call.

  virtual TK_Status `Clone`(BStreamFileToolkit &tk, BBaseOpcodeHandler **handler) const

    Copies the opcode handler

    Parameters: | tk – A reference to the BStreamFileToolkit object. handler – A pointer to the opcode handler object. Passed by reference.
    Returns: | The result of the function call.

  TK_Status `ReadAscii`(BStreamFileToolkit &tk)

    Deprecated.

  TK_Status `WriteAscii`(BStreamFileToolkit &tk)

    Deprecated.

  virtual void `Reset`()

    Resets the current opcode handler. This is called by the toolkit when it is done processing an opcode. This method reinitializes any opcode handler variables and frees up temporary data.

  inline void `SetCurve`(int degree, int control_count, float const points[] = 0, float const weights[] = 0, float const knots[] = 0, float start = 0.0f, float end = 1.0f)

    sets the curve properties

  void `SetDCurve`(int degree, int control_count, double const points[] = 0, float const weights[] = 0, float const knots[] = 0, float start = 0.0f, float end = 1.0f)
  inline float const *`GetPoints`() const

    Gets a constant pointer to the control points

  inline float *`GetPoints`()

    Gets a mutable pointer to the control points

  inline double const *`GetDPoints`() const

    Gets a constant pointer to the control points

  inline double *`GetDPoints`()

    Gets a mutable pointer to the control points

  inline int `GetDegree`() const

    Gets the degree of the curve.

  inline int `GetCount`() const

    Gets the control point count.

  inline float const *`GetWeights`() const

    Gets a constant to the control point weights

  inline float *`GetWeights`()

    Gets a mutable pointer to the control point weights

  inline float const *`GetKnots`() const

    Gets a constant pointer to the curve knots

  inline float *`GetKnots`()

    Gets a mutable pointer to the knots

  inline void `SetStart`(float s)

    Sets the start point of the curve. This, unlike some solid modelers, is parameterized from 0 to 1, an not with respect to whatever is in the knot vector.

  inline float `GetStart`() const

    Gets the start point of the curve.

  inline void `SetEnd`(float e)

    Sets the end point of the curve.

  inline float `GetEnd`() const

    Gets the end point of the curve.

  inline void `SetOptions`(int o)

    Sets the bit flags to declare which optional values are present.

  inline int `GetOptions`() const

    Gets the bit flags to show what optional values are present.

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