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HOpCreateNurbsCurve Class Reference

The HOpCreateNurbsCurve class provides support for constructing a Non Uniform Rational B-Spline (NURBS) curve and inserting it into the model. More...

#include <HOpCreateNurbsCurve.h>

Inheritance diagram for HOpCreateNurbsCurve:

HOpConstructNurbsCurve HOpConstructPolyline HBaseOperator

List of all members.

Public Member Functions

virtual HBaseOperatorClone ()
virtual const char * GetName ()
 HOpCreateNurbsCurve (HBaseView *view, int DoRepeat=0, int DoCapture=1)
virtual int OnLButtonDblClk (HEventInfo &hevent)


Detailed Description

The HOpCreateNurbsCurve class provides support for constructing a Non Uniform Rational B-Spline (NURBS) curve and inserting it into the model.

HOpCreateNurbsCurve uses event information to draw a NURBS curve. The class employs all of the drawing functionality of HOpConstructPolyline to draw a temporary, overlayed NURBS curve and associated 'control polyline' in the view plane, and then uses the HOOPS routine HC_Insert_NURBS_Curve to add a curve to the model.

The operation consists of the following steps:

  1. Left Button Down: The operation is initiated and the first point of the curve is recorded.
  2. No Button Down and Drag: Rubberbands the line segment to a desired position for the next point.
  3. Left Button Down: The next point on curve is recorded and the cycle continues until a left button double click event occurs.
  4. Left Button Double Click: The curve is finalized, the temporary control polyline is flushed and the NURBS curve is inserted into the model.
More Detailed Description: see event methods.

Constructor & Destructor Documentation

HOpCreateNurbsCurve::HOpCreateNurbsCurve ( HBaseView view,
int  DoRepeat = 0,
int  DoCapture = 1 
)

Constructs an HOpCreateNurbsCurve object.

Parameters:
view A pointer to an HBaseView object.
DoRepeat An integer denoting whether this is a repeatable operator. This parameter has been deprecated.
DoCapture An integer denoting whether the mouse state should be captured, which means that all mouse events should be received after a mousedown, even if it leaves the window. This parameter has been deprecated.


Member Function Documentation

virtual HBaseOperator* HOpCreateNurbsCurve::Clone (  )  [virtual]

Creates a new operator which is a copy of the current operator. The user is responsible for deleting the newly created operator.

Returns:
A pointer to the newly created HOpCreateNurbsCurve object.

Reimplemented from HOpConstructNurbsCurve.

virtual const char* HOpCreateNurbsCurve::GetName (  )  [virtual]

Returns:
A pointer to a character string denoting the name of the operator which is 'Create NURBS Curve'.

Reimplemented from HOpConstructNurbsCurve.

virtual int HOpCreateNurbsCurve::OnLButtonDblClk ( HEventInfo hevent  )  [virtual]

OnLButtonDblClk directs the final mouse position into the temp array, then inserts the array into the database as a NURBS curve. This function also takes care of any cleanup.

Parameters:
hevent An HEventInfo object containing information about the current event.
Returns:
An HOperatorReturn indicating the status of the event.

Reimplemented from HOpConstructNurbsCurve.


The documentation for this class was generated from the following file: