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379 lines
12 KiB
C++
379 lines
12 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSphereRepresentation.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkSphereRepresentation
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* @brief a class defining the representation for the vtkSphereWidget2
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*
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* This class is a concrete representation for the vtkSphereWidget2. It
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* represents a sphere with an optional handle. Through interaction with the
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* widget, the sphere can be arbitrarily positioned and scaled in 3D space;
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* and the handle can be moved on the surface of the sphere. Typically the
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* vtkSphereWidget2/vtkSphereRepresentation are used to position a sphere for
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* the purpose of extracting, cutting or clipping data; or the handle is
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* moved on the sphere to position a light or camera.
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*
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* To use this representation, you normally use the PlaceWidget() method
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* to position the widget at a specified region in space. It is also possible
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* to set the center of the sphere, a radius, and/or a handle position.
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*
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* @warning
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* Note that the representation is overconstrained in that the center and radius
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* of the sphere can be defined, this information plus the handle direction defines
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* the geometry of the representation. Alternatively, the user may specify the center
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* of the sphere plus the handle position.
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*
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* @warning
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* This class, and vtkSphereWidget2, are second generation VTK widgets. An
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* earlier version of this functionality was defined in the class
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* vtkSphereWidget.
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*
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* @sa
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* vtkSphereWidget2 vtkSphereWidget
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*/
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#ifndef vtkSphereRepresentation_h
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#define vtkSphereRepresentation_h
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#include "vtkInteractionWidgetsModule.h" // For export macro
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#include "vtkWidgetRepresentation.h"
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#include "vtkSphereSource.h" // Needed for fast access to the sphere source
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class vtkActor;
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class vtkPolyDataMapper;
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class vtkSphere;
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class vtkSphereSource;
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class vtkCellPicker;
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class vtkProperty;
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class vtkPolyData;
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class vtkPoints;
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class vtkPolyDataAlgorithm;
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class vtkTransform;
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class vtkDoubleArray;
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class vtkMatrix4x4;
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class vtkTextMapper;
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class vtkActor2D;
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class vtkTextProperty;
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class vtkLineSource;
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class vtkCursor3D;
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#define VTK_SPHERE_OFF 0
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#define VTK_SPHERE_WIREFRAME 1
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#define VTK_SPHERE_SURFACE 2
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class VTKINTERACTIONWIDGETS_EXPORT vtkSphereRepresentation : public vtkWidgetRepresentation
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{
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public:
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/**
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* Instantiate the class.
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*/
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static vtkSphereRepresentation *New();
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//@{
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/**
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* Standard methods for type information and to print out the contents of the class.
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*/
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vtkTypeMacro(vtkSphereRepresentation,vtkWidgetRepresentation);
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void PrintSelf(ostream& os, vtkIndent indent);
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//@}
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// Used to manage the state of the widget
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enum {Outside=0,MovingHandle,OnSphere,Translating,Scaling};
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//@{
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/**
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* Set the representation (i.e., appearance) of the sphere. Different
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* representations are useful depending on the application.
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*/
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vtkSetClampMacro(Representation,int,VTK_SPHERE_OFF,VTK_SPHERE_SURFACE);
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vtkGetMacro(Representation,int);
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void SetRepresentationToOff()
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{ this->SetRepresentation(VTK_SPHERE_OFF);}
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void SetRepresentationToWireframe()
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{ this->SetRepresentation(VTK_SPHERE_WIREFRAME);}
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void SetRepresentationToSurface()
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{ this->SetRepresentation(VTK_SPHERE_SURFACE);}
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//@}
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/**
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* Set/Get the resolution of the sphere in the theta direction.
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*/
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void SetThetaResolution(int r)
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{ this->SphereSource->SetThetaResolution(r); }
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int GetThetaResolution()
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{ return this->SphereSource->GetThetaResolution(); }
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/**
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* Set/Get the resolution of the sphere in the phi direction.
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*/
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void SetPhiResolution(int r)
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{ this->SphereSource->SetPhiResolution(r); }
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int GetPhiResolution()
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{ return this->SphereSource->GetPhiResolution(); }
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/**
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* Set/Get the center position of the sphere. Note that this may
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* adjust the direction from the handle to the center, as well as
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* the radius of the sphere.
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*/
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void SetCenter(double c[3]);
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void SetCenter(double x, double y, double z)
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{double c[3]; c[0]=x; c[1]=y; c[2]=z; this->SetCenter(c);}
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double* GetCenter()
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{return this->SphereSource->GetCenter();}
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void GetCenter(double xyz[3])
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{this->SphereSource->GetCenter(xyz);}
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/**
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* Set/Get the radius of sphere. Default is 0.5. Note that this may
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* modify the position of the handle based on the handle direction.
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*/
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void SetRadius(double r);
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double GetRadius()
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{ return this->SphereSource->GetRadius(); }
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//@{
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/**
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* The handle sits on the surface of the sphere and may be moved around
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* the surface by picking (left mouse) and then moving. The position
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* of the handle can be retrieved, this is useful for positioning cameras
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* and lights. By default, the handle is turned off.
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*/
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vtkSetMacro(HandleVisibility,int);
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vtkGetMacro(HandleVisibility,int);
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vtkBooleanMacro(HandleVisibility,int);
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//@}
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//@{
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/**
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* Set/Get the position of the handle. Note that this may adjust the radius
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* of the sphere and the handle direction.
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*/
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void SetHandlePosition(double handle[3]);
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void SetHandlePosition(double x, double y, double z)
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{double p[3]; p[0]=x; p[1]=y; p[2]=z; this->SetHandlePosition(p);}
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vtkGetVector3Macro(HandlePosition,double);
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//@}
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//@{
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/**
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* Set/Get the direction vector of the handle relative to the center of
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* the sphere. Setting the direction may affect the position of the handle
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* but will not affect the radius or position of the sphere.
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*/
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void SetHandleDirection(double dir[3]);
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void SetHandleDirection(double dx, double dy, double dz)
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{double d[3]; d[0]=dx; d[1]=dy; d[2]=dz; this->SetHandleDirection(d);}
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vtkGetVector3Macro(HandleDirection,double);
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//@}
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//@{
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/**
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* Enable/disable a label that displays the location of the handle in
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* spherical coordinates (radius,theta,phi). The two angles, theta and
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* phi, are displayed in degrees. Note that phi is measured from the
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* north pole down towards the equator; and theta is the angle around
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* the north/south axis.
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*/
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vtkSetMacro(HandleText,int);
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vtkGetMacro(HandleText,int);
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vtkBooleanMacro(HandleText,int);
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//@}
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//@{
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/**
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* Enable/disable a radial line segment that joins the center of the
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* outer sphere and the handle.
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*/
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vtkSetMacro(RadialLine,int);
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vtkGetMacro(RadialLine,int);
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vtkBooleanMacro(RadialLine,int);
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//@}
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//@{
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/**
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* Enable/disable a center cursor
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* Default is disabled
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*/
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vtkSetMacro(CenterCursor, bool);
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vtkGetMacro(CenterCursor, bool);
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vtkBooleanMacro(CenterCursor, bool);
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//@}
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/**
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* Grab the polydata (including points) that defines the sphere. The
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* polydata consists of n+1 points, where n is the resolution of the
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* sphere. These point values are guaranteed to be up-to-date when either the
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* InteractionEvent or EndInteraction events are invoked. The user provides
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* the vtkPolyData and the points and polysphere are added to it.
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*/
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void GetPolyData(vtkPolyData *pd);
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/**
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* Get the spherical implicit function defined by this widget. Note that
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* vtkSphere is a subclass of vtkImplicitFunction, meaning that it can be
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* used by a variety of filters to perform clipping, cutting, and selection
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* of data.
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*/
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void GetSphere(vtkSphere *sphere);
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//@{
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/**
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* Get the sphere properties. The properties of the sphere when selected
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* and unselected can be manipulated.
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*/
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vtkGetObjectMacro(SphereProperty,vtkProperty);
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vtkGetObjectMacro(SelectedSphereProperty,vtkProperty);
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//@}
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//@{
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/**
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* Get the handle properties (the little ball on the sphere is the
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* handle). The properties of the handle when selected and unselected
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* can be manipulated.
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*/
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vtkGetObjectMacro(HandleProperty,vtkProperty);
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vtkGetObjectMacro(SelectedHandleProperty,vtkProperty);
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//@}
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//@{
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/**
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* Get the handle text property. This can be used to control the appearance
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* of the handle text.
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*/
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vtkGetObjectMacro(HandleTextProperty,vtkTextProperty);
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//@}
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//@{
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/**
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* Get the property of the radial line. This can be used to control the
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* appearance of the optional line connecting the center to the handle.
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*/
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vtkGetObjectMacro(RadialLineProperty,vtkProperty);
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//@}
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/**
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* The interaction state may be set from a widget (e.g., vtkSphereWidget2) or
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* other object. This controls how the interaction with the widget
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* proceeds. Normally this method is used as part of a handshaking
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* process with the widget: First ComputeInteractionState() is invoked that
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* returns a state based on geometric considerations (i.e., cursor near a
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* widget feature), then based on events, the widget may modify this
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* further.
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*/
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void SetInteractionState(int state);
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//@{
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/**
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* These are methods that satisfy vtkWidgetRepresentation's API. Note that a
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* version of place widget is available where the center and handle position
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* are specified.
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*/
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virtual void PlaceWidget(double bounds[6]);
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virtual void PlaceWidget(double center[3], double handlePosition[3]);
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virtual void BuildRepresentation();
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virtual int ComputeInteractionState(int X, int Y, int modify=0);
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virtual void StartWidgetInteraction(double e[2]);
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virtual void WidgetInteraction(double e[2]);
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virtual double *GetBounds();
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//@}
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//@{
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/**
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* Methods supporting, and required by, the rendering process.
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*/
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virtual void ReleaseGraphicsResources(vtkWindow*);
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virtual int RenderOpaqueGeometry(vtkViewport*);
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virtual int RenderTranslucentPolygonalGeometry(vtkViewport*);
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virtual int RenderOverlay(vtkViewport*);
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virtual int HasTranslucentPolygonalGeometry();
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//@}
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protected:
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vtkSphereRepresentation();
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~vtkSphereRepresentation();
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// Manage how the representation appears
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double LastEventPosition[3];
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// the sphere
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vtkActor *SphereActor;
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vtkPolyDataMapper *SphereMapper;
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vtkSphereSource *SphereSource;
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void HighlightSphere(int highlight);
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// The representation of the sphere
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int Representation;
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// Do the picking
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vtkCellPicker *HandlePicker;
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vtkCellPicker *SpherePicker;
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double LastPickPosition[3];
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// Register internal Pickers within PickingManager
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virtual void RegisterPickers();
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// Methods to manipulate the sphere widget
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void Translate(double *p1, double *p2);
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void Scale(double *p1, double *p2, int X, int Y);
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void PlaceHandle(double *center, double radius);
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virtual void SizeHandles();
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// Method to adapt the center cursor bounds
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// so it always have the same pixel size on screen
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virtual void AdaptCenterCursorBounds();
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// Properties used to control the appearance of selected objects and
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// the manipulator in general.
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vtkProperty *SphereProperty;
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vtkProperty *SelectedSphereProperty;
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vtkProperty *HandleProperty;
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vtkProperty *SelectedHandleProperty;
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void CreateDefaultProperties();
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// Managing the handle
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vtkActor *HandleActor;
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vtkPolyDataMapper *HandleMapper;
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vtkSphereSource *HandleSource;
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void HighlightHandle(int);
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int HandleVisibility;
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double HandleDirection[3];
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double HandlePosition[3];
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// Manage the handle label
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int HandleText;
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vtkTextProperty *HandleTextProperty;
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vtkTextMapper *HandleTextMapper;
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vtkActor2D *HandleTextActor;
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// Manage the radial line segment
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int RadialLine;
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vtkProperty *RadialLineProperty;
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vtkLineSource *RadialLineSource;
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vtkPolyDataMapper *RadialLineMapper;
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vtkActor *RadialLineActor;
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// Managing the center cursor
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vtkActor *CenterActor;
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vtkPolyDataMapper *CenterMapper;
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vtkCursor3D *CenterCursorSource;
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bool CenterCursor;
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private:
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vtkSphereRepresentation(const vtkSphereRepresentation&) VTK_DELETE_FUNCTION;
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void operator=(const vtkSphereRepresentation&) VTK_DELETE_FUNCTION;
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};
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#endif
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