VTK-5.0.0/Common/vtkProp.cxx

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkProp.cxx,v $

  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.

=========================================================================*/
#include "vtkProp.h"
#include "vtkObjectFactory.h"
#include "vtkAssemblyPaths.h"
#include "vtkCommand.h"

vtkCxxRevisionMacro(vtkProp, "$Revision: 1.25 $");

// Creates an Prop with the following defaults: visibility on.
vtkProp::vtkProp()
{
  this->Visibility = 1;  // ON

  this->Pickable   = 1;
  this->Dragable   = 1;
  
  this->AllocatedRenderTime = 10.0;
  this->EstimatedRenderTime = 0.0;
  this->RenderTimeMultiplier = 1.0;

  this->Paths = NULL;

  this->NumberOfConsumers = 0;
  this->Consumers = 0;
}

vtkProp::~vtkProp()
{
  if ( this->Paths )
    {
    this->Paths->Delete();
    }
  if (this->Consumers)
    {
    delete [] this->Consumers;
    }
}

// This method is invoked if the prop is picked.
void vtkProp::Pick()
{
  this->InvokeEvent(vtkCommand::PickEvent,NULL);
}

// Shallow copy of vtkProp.
void vtkProp::ShallowCopy(vtkProp *prop)
{
  this->Visibility = prop->GetVisibility();
  this->Pickable   = prop->GetPickable();
  this->Dragable   = prop->GetDragable();
}

void vtkProp::InitPathTraversal()
{
  if ( this->Paths == NULL )
    {
    this->Paths = vtkAssemblyPaths::New();
    vtkAssemblyPath *path = vtkAssemblyPath::New();
    path->AddNode(this,NULL);
    this->BuildPaths(this->Paths,path);
    path->Delete();
    }
  this->Paths->InitTraversal();
}

vtkAssemblyPath *vtkProp::GetNextPath()
{
  if ( ! this->Paths)
    {
    return NULL;
    }
  return this->Paths->GetNextItem();
}

// This method is used in conjunction with the assembly object to build a copy
// of the assembly hierarchy. This hierarchy can then be traversed for 
// rendering, picking or other operations.
void vtkProp::BuildPaths(vtkAssemblyPaths *paths, vtkAssemblyPath *path)
{
  // This is a leaf node in the assembly hierarchy so we
  // copy the path in preparation to assingning it to paths.
  vtkAssemblyPath *childPath = vtkAssemblyPath::New();
  childPath->ShallowCopy(path);

  // We can add this path to the list of paths
  paths->AddItem(childPath);
  childPath->Delete(); //okay, reference counting
}

void vtkProp::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);

  os << indent << "Dragable: " << (this->Dragable ? "On\n" : "Off\n");
  os << indent << "Pickable: " << (this->Pickable ? "On\n" : "Off\n");

  os << indent << "AllocatedRenderTime: " 
     << this->AllocatedRenderTime << endl;
  os << indent << "EstimatedRenderTime: " 
     << this->EstimatedRenderTime << endl;
  os << indent << "NumberOfConsumers: " << this->NumberOfConsumers << endl;
  os << indent << "RenderTimeMultiplier: " 
     << this->RenderTimeMultiplier << endl;
  os << indent << "Visibility: " << (this->Visibility ? "On\n" : "Off\n");
}


void vtkProp::AddConsumer(vtkObject *c)
{
  // make sure it isn't already there
  if (this->IsConsumer(c))
    {
    return;
    }
  // add it to the list, reallocate memory
  vtkObject **tmp = this->Consumers;
  this->NumberOfConsumers++;
  this->Consumers = new vtkObject* [this->NumberOfConsumers];
  for (int i = 0; i < (this->NumberOfConsumers-1); i++)
    {
    this->Consumers[i] = tmp[i];
    }
  this->Consumers[this->NumberOfConsumers-1] = c;
  // free old memory
  delete [] tmp;
}

void vtkProp::RemoveConsumer(vtkObject *c)
{
  // make sure it is already there
  if (!this->IsConsumer(c))
    {
    return;
    }
  // remove it from the list, reallocate memory
  vtkObject **tmp = this->Consumers;
  this->NumberOfConsumers--;
  this->Consumers = new vtkObject* [this->NumberOfConsumers];
  int cnt = 0;
  int i;
  for (i = 0; i <= this->NumberOfConsumers; i++)
    {
    if (tmp[i] != c)
      {
      this->Consumers[cnt] = tmp[i];
      cnt++;
      }
    }
  // free old memory
  delete [] tmp;
}

int vtkProp::IsConsumer(vtkObject *c)
{
  int i;
  for (i = 0; i < this->NumberOfConsumers; i++)
    {
    if (this->Consumers[i] == c)
      {
      return 1;
      }
    }
  return 0;
}

vtkObject *vtkProp::GetConsumer(int i)
{
  if (i >= this->NumberOfConsumers)
    {
    return 0;
    }
  return this->Consumers[i];
}