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106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkAssemblyNode.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 vtkAssemblyNode
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* @brief represent a node in an assembly
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*
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* vtkAssemblyNode represents a node in an assembly. It is used by
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* vtkAssemblyPath to create hierarchical assemblies of props. The
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* props can be either 2D or 3D.
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*
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* An assembly node refers to a vtkProp, and possibly a vtkMatrix4x4.
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* Nodes are used by vtkAssemblyPath to build fully evaluated path
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* (matrices are concatenated through the path) that is used by picking
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* and other operations involving assemblies.
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*
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* @warning
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* The assembly node is guaranteed to contain a reference to an instance
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* of vtkMatrix4x4 if the prop referred to by the node is of type
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* vtkProp3D (or subclass). The matrix is evaluated through the assembly
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* path, so the assembly node's matrix is a function of its location in
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* the vtkAssemblyPath.
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*
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* @warning
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* vtkAssemblyNode does not reference count its association with vtkProp.
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* Therefore, do not create an assembly node, associate a prop with it,
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* delete the prop, and then try to dereference the prop. The program
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* will break! (Reason: vtkAssemblyPath (which uses vtkAssemblyNode)
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* create self-referencing loops that destroy reference counting.)
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*
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* @sa
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* vtkAssemblyPath vtkProp vtkPicker vtkMatrix4x4
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*/
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#ifndef vtkAssemblyNode_h
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#define vtkAssemblyNode_h
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#include "vtkObject.h"
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#include "vtkRenderingCoreModule.h" // For export macro
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class vtkProp;
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class vtkMatrix4x4;
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class VTKRENDERINGCORE_EXPORT vtkAssemblyNode : public vtkObject
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{
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public:
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/**
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* Create an assembly node.
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*/
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static vtkAssemblyNode* New();
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vtkTypeMacro(vtkAssemblyNode, vtkObject);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Set/Get the prop that this assembly node refers to.
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*/
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virtual void SetViewProp(vtkProp* prop);
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vtkGetObjectMacro(ViewProp, vtkProp);
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//@}
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//@{
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/**
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* Specify a transformation matrix associated with the prop.
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* Note: if the prop is not a type of vtkProp3D, then the
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* transformation matrix is ignored (and expected to be NULL).
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* Also, internal to this object the matrix is copied because
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* the matrix is used for computation by vtkAssemblyPath.
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*/
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void SetMatrix(vtkMatrix4x4* matrix);
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vtkGetObjectMacro(Matrix, vtkMatrix4x4);
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//@}
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/**
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* Override the standard GetMTime() to check for the modified times
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* of the prop and matrix.
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*/
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vtkMTimeType GetMTime() override;
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protected:
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vtkAssemblyNode();
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~vtkAssemblyNode() override;
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private:
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vtkProp* ViewProp; // reference to vtkProp
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vtkMatrix4x4* Matrix; // associated matrix
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private:
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void operator=(const vtkAssemblyNode&) = delete;
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vtkAssemblyNode(const vtkAssemblyNode&) = delete;
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};
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#endif
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