HOpCreateNurbsCurve

Detailed Description

class HOpCreateNurbsCurve : public HOpConstructNurbsCurve

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.

Public Functions

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.
virtual ~HOpCreateNurbsCurve()
virtual HBaseOperator *Clone()

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.
virtual char const *GetName()
Returns:A pointer to a character string denoting the name of the operator, which is ‘HOpCreateNurbsCurve’.
virtual int OnLButtonDblClk(HEventInfo &hevent)

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.