HOpConstructSphere
Functions
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Detailed Description
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class HOpConstructSphere : public HBaseOperator
The HOpConstructSphere class provides support for constructing a sphere and inserting it into the model.
HOpConstructSphere implements three of the mouse event handlers defined on the base class and maps the events to local methods that rubberband a sphere and insert a corresponding HOOPS shell into the HOOPS database. This provides the basic functionality for drawing a three-dimensional, tesselated sphere. The operation consists of the following steps:
Left Button Down: Registers the center point of the sphere.
Left Button Down and Drag: Rubberbands the sphere to the desired circumference.
Left Button Up: Circumference is finalized, the scene is cleared and the operation ends.
Subclassed by HOpCreateSphere
Public Functions
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HOpConstructSphere(HBaseView *view, int DoRepeat = 0, int DoCapture = 1)
Constructs an HOpConstructSphere 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.
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virtual ~HOpConstructSphere()
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virtual char const *GetName()
- Returns
A pointer to a character string denoting the name of the operator which is ‘Construct Sphere’.
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virtual int OnLButtonDown(HEventInfo &hevent)
OnLButtonDown records the first pointer position and initiates the sphere-drawing mechanism.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
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virtual int OnLButtonDownAndMove(HEventInfo &hevent)
OnLButtonDownAndMove draws rubberbanded lines along the circumference of three great circles centered on the first pointer position: one equatorial, one along the prime meridian, and one 90-degrees from the prime meridian. Note that the basic dynamic drawing work is done by repeated calls to the protected function HOpConstructSphere::ConstructWireframeSphere.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
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virtual int OnLButtonUp(HEventInfo &hevent)
OnLButtonUp finalizes the size of the sphere and cleans up.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
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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 HOpConstructSphere object.