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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPropAssembly.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkPropAssembly - create hierarchies of props
// .SECTION Description
// vtkPropAssembly is an object that groups props and other prop assemblies
// into a tree-like hierarchy. The props can then be treated as a group
// (e.g., turning visibility on and off).
//
// A vtkPropAssembly object can be used in place of an vtkProp since it is a
// subclass of vtkProp. The difference is that vtkPropAssembly maintains a
// list of other prop and prop assembly instances (its "parts") that form the
// assembly. Note that this process is recursive: you can create groups
// consisting of prop assemblies to arbitrary depth.
//
// vtkPropAssembly's and vtkProp's that compose a prop assembly need not be
// added to a renderer's list of props, as long as the parent assembly is in
// the prop list. This is because they are automatically renderered during
// the hierarchical traversal process.
// .SECTION Caveats
// vtkPropAssemblies can consist of hierarchies of assemblies, where one
// actor or assembly used in one hierarchy is also used in other
// hierarchies. However, make that there are no cycles (e.g.,
// parent->child->parent), this will cause program failure.
// .SECTION See Also
// vtkProp3D vtkActor vtkAssembly vtkActor2D vtkVolume
#ifndef __vtkPropAssembly_h
#define __vtkPropAssembly_h
#include "vtkProp.h"
class VTK_FILTERING_EXPORT vtkPropAssembly : public vtkProp
{
public:
vtkTypeMacro(vtkPropAssembly,vtkProp);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Create with an empty parts list.
static vtkPropAssembly *New();
// Description:
// Add a part to the list of parts.
void AddPart(vtkProp *);
// Description:
// Remove a part from the list of parts,
void RemovePart(vtkProp *);
// Description:
// Return the list of parts.
vtkPropCollection *GetParts();
// Description:
// Render this assembly and all its parts. The rendering process is
// recursive. The parts of each assembly are rendered only if the
// visibility for the prop is turned on.
int RenderOpaqueGeometry(vtkViewport *ren);
virtual int RenderTranslucentPolygonalGeometry( vtkViewport *ren);
virtual int RenderVolumetricGeometry( vtkViewport *ren);
int RenderOverlay(vtkViewport *ren);
// Description:
// Does this prop have some translucent polygonal geometry?
virtual int HasTranslucentPolygonalGeometry();
// Description:
// Release any graphics resources that are being consumed by this actor.
// The parameter window could be used to determine which graphic
// resources to release.
void ReleaseGraphicsResources(vtkWindow *);
// Description:
// Get the bounds for this prop assembly as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
// May return NULL in some cases (meaning the bounds is undefined).
double *GetBounds();
// Description:
// Shallow copy of this vtkPropAssembly.
void ShallowCopy(vtkProp *Prop);
// Description:
// Override default GetMTime method to also consider all of the
// prop assembly's parts.
unsigned long int GetMTime();
// Description:
// Methods to traverse the paths (i.e., leaf nodes) of a prop
// assembly. These methods should be contrasted to those that traverse the
// list of parts using GetParts(). GetParts() returns a list of children
// of this assembly, not necessarily the leaf nodes of the assembly. To use
// the methods below - first invoke InitPathTraversal() followed by
// repeated calls to GetNextPath(). GetNextPath() returns a NULL pointer
// when the list is exhausted. (See the superclass vtkProp for more
// information about paths.)
void InitPathTraversal();
vtkAssemblyPath *GetNextPath();
int GetNumberOfPaths();
//BTX
// Description:
// WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
// DO NOT USE THIS METHOD OUTSIDE OF THE RENDERING PROCESS
// Overload the superclass' vtkProp BuildPaths() method.
void BuildPaths(vtkAssemblyPaths *paths, vtkAssemblyPath *path);
//ETX
protected:
vtkPropAssembly();
~vtkPropAssembly();
vtkPropCollection *Parts;
double Bounds[6];
// Support the BuildPaths() method,
vtkTimeStamp PathTime;
void UpdatePaths(); //apply transformations and properties recursively
private:
vtkPropAssembly(const vtkPropAssembly&); // Not implemented.
void operator=(const vtkPropAssembly&); // Not implemented.
};
#endif
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