mitkCone.cpp

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

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center,
Division of Medical and Biological Informatics.
All rights reserved.

This software is distributed WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.

See LICENSE.txt or http://www.mitk.org for details.

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

#include "mitkCone.h"
#include "mitkNumericTypes.h"
#include "vtkConeSource.h"
#include "vtkLinearTransform.h"

mitk::Cone::Cone() : BoundingObject()
{
  // Set up Cone Surface. Radius 1.0, height 2.0, , centered around the origin
  vtkConeSource *cone = vtkConeSource::New();
  cone->SetRadius(1.0);
  cone->SetHeight(2.0);
  cone->SetDirection(0.0, -1.0, 0.0);
  cone->SetCenter(0.0, 0.0, 0.0);
  cone->SetResolution(20);
  cone->CappingOn();
  cone->Update();
  SetVtkPolyData(cone->GetOutput());
  cone->Delete();
}

mitk::Cone::~Cone()
{
}

bool mitk::Cone::IsInside(const Point3D &worldPoint) const
{
  // transform point from world to object coordinates
  ScalarType p[4];
  p[0] = worldPoint[0];
  p[1] = worldPoint[1];
  p[2] = worldPoint[2];
  p[3] = 1;

  GetGeometry()->GetVtkTransform()->GetInverse()->TransformPoint(p, p);

  p[1] += 1; // translate point, so that it fits to the formula below, which describes a cone that has its cone vertex
             // at the origin
  return (sqrt(p[0] * p[0] + p[2] * p[2]) <= p[1] * 0.5) && (p[1] <= 2); // formula to calculate if a given point is
                                                                         // inside a cone that has its cone vertex at
                                                                         // the origin, is aligned on the second axis,
                                                                         // has a radius of one an a height of two
}

mitk::ScalarType mitk::Cone::GetVolume()
{
  TimeGeometry *geometry = GetTimeGeometry();
  return geometry->GetExtentInWorld(0) * 0.5 * geometry->GetExtentInWorld(2) * 0.5 * vnl_math::pi / 3.0 *
         geometry->GetExtentInWorld(1);
}