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

Copyright (c) 1998-2012 Kitware Inc. 28 Corporate Drive,
Clifton Park, NY, 12065, USA.

All rights reserved. No part of this software may be reproduced,
distributed,
or modified, in any form or by any means, without permission in writing from
Kitware Inc.

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE IS PROVIDED ON AN
"AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO
PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
=========================================================================*/
#include "vtkCMBImplicitPlaneRepresentation.h"

#include "vtkActor.h"
#include "vtkAssemblyNode.h"
#include "vtkAssemblyPath.h"
#include "vtkCallbackCommand.h"
#include "vtkCamera.h"
#include "vtkCellPicker.h"
#include "vtkConeSource.h"
#include "vtkCutter.h"
#include "vtkFeatureEdges.h"
#include "vtkImageData.h"
#include "vtkLineSource.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkOutlineFilter.h"
#include "vtkPlane.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkProperty.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSphereSource.h"
#include "vtkTransform.h"
#include "vtkTubeFilter.h"
#include "vtkInteractorObserver.h"
#include "vtkBox.h"

vtkStandardNewMacro(vtkCMBImplicitPlaneRepresentation);

//----------------------------------------------------------------------------
vtkCMBImplicitPlaneRepresentation::vtkCMBImplicitPlaneRepresentation()
{
  this->NormalFixed = 1;
  this->ScaleEnabled = 0;
  this->Tubing = 0;
  // Hide the edges.
  this->EdgesMapper->SetInputData(0);
  this->EdgesActor->SetMapper(0);
  this->EdgesActor->SetVisibility(0);
}

//----------------------------------------------------------------------------
vtkCMBImplicitPlaneRepresentation::~vtkCMBImplicitPlaneRepresentation()
{
}

//----------------------------------------------------------------------------
int vtkCMBImplicitPlaneRepresentation::ComputeInteractionState(
  int X, int Y, int modify)
{
  if(!this->NormalFixed)
    {
    return this->Superclass::ComputeInteractionState(X, Y, modify);
    }

  // See if anything has been selected
  vtkAssemblyPath *path;
  this->Picker->Pick(X,Y,0.0,this->Renderer);
  path = this->Picker->GetPath();

  if ( path == NULL ) //not picking this widget
    {
    this->SetRepresentationState(vtkCMBImplicitPlaneRepresentation::Outside);
    this->InteractionState = vtkCMBImplicitPlaneRepresentation::Outside;
    return this->InteractionState;
    }

  // Something picked, continue
  this->ValidPick = 1;

  // Depending on the interaction state (set by the widget) we modify
  // this state based on what is picked.
  if ( this->InteractionState == vtkCMBImplicitPlaneRepresentation::Moving )
    {
    this->InteractionState = vtkCMBImplicitPlaneRepresentation::Pushing;
    this->SetRepresentationState(vtkCMBImplicitPlaneRepresentation::Pushing);
    }
  else
    {
    this->InteractionState = vtkCMBImplicitPlaneRepresentation::Outside;
    }

  return this->InteractionState;
}

//----------------------------------------------------------------------------
void vtkCMBImplicitPlaneRepresentation::WidgetInteraction(double e[2])
{
  if(!this->NormalFixed)
    {
    return this->Superclass::WidgetInteraction(e);
    }
  // Do different things depending on state
  // Calculations everybody does
  double focalPoint[4], pickPoint[4], prevPickPoint[4];
  double z;

  vtkCamera *camera = this->Renderer->GetActiveCamera();
  if ( !camera )
    {
    return;
    }

  // Compute the two points defining the motion vector
  double pos[3];
  this->Picker->GetPickPosition(pos);
  vtkInteractorObserver::ComputeWorldToDisplay(this->Renderer, pos[0], pos[1], pos[2],
    focalPoint);
  z = focalPoint[2];
  vtkInteractorObserver::ComputeDisplayToWorld(this->Renderer,this->LastEventPosition[0],
    this->LastEventPosition[1], z, prevPickPoint);
  vtkInteractorObserver::ComputeDisplayToWorld(this->Renderer, e[0], e[1], z, pickPoint);

  // Process the motion
  if ( this->InteractionState == vtkImplicitPlaneRepresentation::Pushing )
    {
    this->TranslateAlongNormal(prevPickPoint, pickPoint);
    }

  this->LastEventPosition[0] = e[0];
  this->LastEventPosition[1] = e[1];
  this->LastEventPosition[2] = 0.0;
}

//----------------------------------------------------------------------------
void vtkCMBImplicitPlaneRepresentation::TranslateAlongNormal(double *p1, double *p2)
{
  //Get the motion vector
  double tmpV[3];
  tmpV[0] = p2[0] - p1[0];
  tmpV[1] = p2[1] - p1[1];
  tmpV[2] = p2[2] - p1[2];

  double normal[3];
  this->GetNormal(normal);

  double v[3];
  if(!vtkMath::ProjectVector(tmpV, normal, v))
    {
    return;
    }
  //Translate the bounding box
  double *origin = this->Box->GetOrigin();
  double oNew[3];
  oNew[0] = origin[0] + v[0];
  oNew[1] = origin[1] + v[1];
  oNew[2] = origin[2] + v[2];
  this->Box->SetOrigin(oNew);

  //Translate the plane
  origin = this->Plane->GetOrigin();
  oNew[0] = origin[0] + v[0];
  oNew[1] = origin[1] + v[1];
  oNew[2] = origin[2] + v[2];
  this->Plane->SetOrigin(oNew);

  this->BuildRepresentation();
}

//----------------------------------------------------------------------------
void vtkCMBImplicitPlaneRepresentation::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
  os << indent << "NormalFixed: " << this->NormalFixed << "\n";
}
