vtkBoundingBox.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkBoundingBox_h
#define vtkBoundingBox_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkSystemIncludes.h"
 
#include <algorithm> // For std::min, std::max
#include <atomic>    // For threaded bounding box computation
 
VTK_ABI_NAMESPACE_BEGIN
class vtkPoints;
 
class VTKCOMMONDATAMODEL_EXPORT vtkBoundingBox
{
public:

  vtkBoundingBox();
  vtkBoundingBox(const double bounds[6]);
  vtkBoundingBox(double xMin, double xMax, double yMin, double yMax, double zMin, double zMax);
  vtkBoundingBox(const double min[3], const double max[3]);
  vtkBoundingBox(double center[3], double delta);

  vtkBoundingBox(const vtkBoundingBox& bbox);

  vtkBoundingBox& operator=(const vtkBoundingBox& bbox);


  bool operator==(const vtkBoundingBox& bbox) const;
  bool operator!=(const vtkBoundingBox& bbox) const;


  void SetBounds(const double bounds[6]);
  void SetBounds(double xMin, double xMax, double yMin, double yMax, double zMin, double zMax);


  static void ComputeBounds(vtkPoints* pts, double bounds[6]);
  static void ComputeBounds(vtkPoints* pts, const unsigned char* ptUses, double bounds[6]);
  static void ComputeBounds(
    vtkPoints* pts, const std::atomic<unsigned char>* ptUses, double bounds[6]);
  template <typename TIter>
  static void ComputeBounds(vtkPoints* pts, TIter ptIds, vtkIdType numPointIds, double bounds[6]);
  void ComputeBounds(vtkPoints* pts)
  {
    double bds[6];
    vtkBoundingBox::ComputeBounds(pts, bds);
    this->MinPnt[0] = bds[0];
    this->MinPnt[1] = bds[2];
    this->MinPnt[2] = bds[4];
    this->MaxPnt[0] = bds[1];
    this->MaxPnt[1] = bds[3];
    this->MaxPnt[2] = bds[5];
  }
  void ComputeBounds(vtkPoints* pts, unsigned char* ptUses)
  {
    double bds[6];
    vtkBoundingBox::ComputeBounds(pts, ptUses, bds);
    this->MinPnt[0] = bds[0];
    this->MinPnt[1] = bds[2];
    this->MinPnt[2] = bds[4];
    this->MaxPnt[0] = bds[1];
    this->MaxPnt[1] = bds[3];
    this->MaxPnt[2] = bds[5];
  }


  static void ComputeLocalBounds(
    vtkPoints* points, double u[3], double v[3], double w[3], double outputBounds[6]);


  void SetMinPoint(double x, double y, double z);
  void SetMinPoint(double p[3]);


  void SetMaxPoint(double x, double y, double z);
  void SetMaxPoint(double p[3]);


  int IsValid() const;
  static int IsValid(const double bounds[6]);


  void AddPoint(double p[3]);
  void AddPoint(double px, double py, double pz);

  void AddBox(const vtkBoundingBox& bbox);

  void AddBounds(const double bounds[6]);

  bool IsSubsetOf(const vtkBoundingBox& bbox) const;

  int IntersectBox(const vtkBoundingBox& bbox);

  int Intersects(const vtkBoundingBox& bbox) const;

  bool IntersectPlane(double origin[3], double normal[3]);

  static bool IntersectsSphere(
    const double min[3], const double max[3], const double center[3], double r2)
  {
    double d2 = 0.0;
    for (int i = 0; i < 3; ++i)
    {
      if (center[i] < min[i])
      {
        d2 += (center[i] - min[i]) * (center[i] - min[i]);
      }
      else if (center[i] > max[i])
      {
        d2 += (center[i] - max[i]) * (center[i] - max[i]);
      }
    }
    return (d2 <= r2);
  }

  bool IntersectsSphere(double center[3], double radius) const;

  bool IntersectsSphere2(double center[3], double radius2) const
  {
    return vtkBoundingBox::IntersectsSphere(this->MinPnt, this->MaxPnt, center, radius2);
  }

  static bool InsideSphere(
    const double min[3], const double max[3], const double center[3], double r2)
  {
    double dmax = 0.0;
    for (int i = 0; i < 3; ++i)
    {
      double a = (center[i] - min[i]) * (center[i] - min[i]);
      double b = (center[i] - max[i]) * (center[i] - max[i]);
      dmax += std::max(a, b);
    }
    return dmax <= r2;
  }

  bool InsideSphere(double center[3], double radius2) const
  {
    return vtkBoundingBox::InsideSphere(this->MinPnt, this->MaxPnt, center, radius2);
  }

  bool IntersectsLine(const double p1[3], const double p2[3]) const;

  int ComputeInnerDimension() const;

  int Contains(const vtkBoundingBox& bbox) const;

  static bool ContainsLine(const double x[3], const double s[3], const double lineEnd[3], double& t,
    double xInt[3], int& plane);


  void GetBounds(double bounds[6]) const;
  void GetBounds(
    double& xMin, double& xMax, double& yMin, double& yMax, double& zMin, double& zMax) const;

  double GetBound(int i) const;


  const double* GetMinPoint() const VTK_SIZEHINT(3);
  void GetMinPoint(double& x, double& y, double& z) const;
  void GetMinPoint(double x[3]) const;


  const double* GetMaxPoint() const VTK_SIZEHINT(3);
  void GetMaxPoint(double& x, double& y, double& z) const;
  void GetMaxPoint(double x[3]) const;

  void GetCorner(int corner, double p[3]) const;


  vtkTypeBool ContainsPoint(const double p[3]) const;
  vtkTypeBool ContainsPoint(double px, double py, double pz) const;
  template <class PointT>
  bool ContainsPoint(const PointT& p) const;

  void GetCenter(double center[3]) const;

  void GetLengths(double lengths[3]) const;

  double GetLength(int i) const;

  double GetMaxLength() const;


  double GetDiagonalLength2() const;
  double GetDiagonalLength() const;


  void Inflate(double delta);
  void Inflate(double deltaX, double deltaY, double deltaZ);
  void Inflate();
  void InflateSlice(double delta);


  void Scale(double s[3]);
  void Scale(double sx, double sy, double sz);


  void ScaleAboutCenter(double s);
  void ScaleAboutCenter(double s[3]);
  void ScaleAboutCenter(double sx, double sy, double sz);

  vtkIdType ComputeDivisions(vtkIdType totalBins, double bounds[6], int divs[3]) const;

  static void ClampDivisions(vtkIdType targetBins, int divs[3]);

  void Reset();

  void ClampPoint(double point[3]);

  void GetDistance(double point[3], double distance[3]);

  void Translate(double motion[3]);
 
protected:
  double MinPnt[3], MaxPnt[3];
};
 
inline void vtkBoundingBox::Reset()
{
  this->MinPnt[0] = this->MinPnt[1] = this->MinPnt[2] = VTK_DOUBLE_MAX;
  this->MaxPnt[0] = this->MaxPnt[1] = this->MaxPnt[2] = VTK_DOUBLE_MIN;
}
 
inline void vtkBoundingBox::GetBounds(
  double& xMin, double& xMax, double& yMin, double& yMax, double& zMin, double& zMax) const
{
  xMin = this->MinPnt[0];
  xMax = this->MaxPnt[0];
  yMin = this->MinPnt[1];
  yMax = this->MaxPnt[1];
  zMin = this->MinPnt[2];
  zMax = this->MaxPnt[2];
}
 
inline double vtkBoundingBox::GetBound(int i) const
{
  // If i is odd then when are returning a part of the max bounds
  // else part of the min bounds is requested.  The exact component
  // needed is i /2 (or i right shifted by 1
  return ((i & 0x1) ? this->MaxPnt[i >> 1] : this->MinPnt[i >> 1]);
}
 
inline const double* vtkBoundingBox::GetMinPoint() const
{
  return this->MinPnt;
}
 
inline void vtkBoundingBox::GetMinPoint(double x[3]) const
{
  x[0] = this->MinPnt[0];
  x[1] = this->MinPnt[1];
  x[2] = this->MinPnt[2];
}
 
inline const double* vtkBoundingBox::GetMaxPoint() const
{
  return this->MaxPnt;
}
 
inline void vtkBoundingBox::GetMaxPoint(double x[3]) const
{
  x[0] = this->MaxPnt[0];
  x[1] = this->MaxPnt[1];
  x[2] = this->MaxPnt[2];
}
 
inline int vtkBoundingBox::IsValid() const
{
  return ((this->MinPnt[0] <= this->MaxPnt[0]) && (this->MinPnt[1] <= this->MaxPnt[1]) &&
    (this->MinPnt[2] <= this->MaxPnt[2]));
}
 
inline int vtkBoundingBox::IsValid(const double bounds[6])
{
  return (bounds[0] <= bounds[1] && bounds[2] <= bounds[3] && bounds[4] <= bounds[5]);
}
 
inline double vtkBoundingBox::GetLength(int i) const
{
  return this->MaxPnt[i] - this->MinPnt[i];
}
 
inline void vtkBoundingBox::GetLengths(double lengths[3]) const
{
  lengths[0] = this->GetLength(0);
  lengths[1] = this->GetLength(1);
  lengths[2] = this->GetLength(2);
}
 
inline void vtkBoundingBox::GetCenter(double center[3]) const
{
  center[0] = 0.5 * (this->MaxPnt[0] + this->MinPnt[0]);
  center[1] = 0.5 * (this->MaxPnt[1] + this->MinPnt[1]);
  center[2] = 0.5 * (this->MaxPnt[2] + this->MinPnt[2]);
}
 
inline bool vtkBoundingBox::IsSubsetOf(const vtkBoundingBox& bbox) const
{
  const double* bboxMaxPnt = bbox.GetMaxPoint();
  const double* bboxMinPnt = bbox.GetMinPoint();
  return this->MaxPnt[0] < bboxMaxPnt[0] && this->MinPnt[0] > bboxMinPnt[0] &&
    this->MaxPnt[1] < bboxMaxPnt[1] && this->MinPnt[1] > bboxMinPnt[1] &&
    this->MaxPnt[2] < bboxMaxPnt[2] && this->MinPnt[2] > bboxMinPnt[2];
}
 
inline void vtkBoundingBox::SetBounds(const double bounds[6])
{
  this->SetBounds(bounds[0], bounds[1], bounds[2], bounds[3], bounds[4], bounds[5]);
}
 
inline void vtkBoundingBox::GetBounds(double bounds[6]) const
{
  this->GetBounds(bounds[0], bounds[1], bounds[2], bounds[3], bounds[4], bounds[5]);
}
 
inline vtkBoundingBox::vtkBoundingBox()
{
  this->Reset();
}
 
inline vtkBoundingBox::vtkBoundingBox(const double bounds[6])
{
  this->Reset();
  this->SetBounds(bounds);
}
 
inline vtkBoundingBox::vtkBoundingBox(
  double xMin, double xMax, double yMin, double yMax, double zMin, double zMax)
{
  this->Reset();
  this->SetBounds(xMin, xMax, yMin, yMax, zMin, zMax);
}
 
inline vtkBoundingBox::vtkBoundingBox(const vtkBoundingBox& bbox)
{
  this->MinPnt[0] = bbox.MinPnt[0];
  this->MinPnt[1] = bbox.MinPnt[1];
  this->MinPnt[2] = bbox.MinPnt[2];
 
  this->MaxPnt[0] = bbox.MaxPnt[0];
  this->MaxPnt[1] = bbox.MaxPnt[1];
  this->MaxPnt[2] = bbox.MaxPnt[2];
}
 
inline vtkBoundingBox::vtkBoundingBox(const double min[3], const double max[3])
{
  this->MinPnt[0] = min[0];
  this->MinPnt[1] = min[1];
  this->MinPnt[2] = min[2];
 
  this->MaxPnt[0] = max[0];
  this->MaxPnt[1] = max[1];
  this->MaxPnt[2] = max[2];
}
 
inline vtkBoundingBox::vtkBoundingBox(double center[3], double delta)
{
  this->Reset();
  this->AddPoint(center);
  this->Inflate(delta);
}
 
inline vtkBoundingBox& vtkBoundingBox::operator=(const vtkBoundingBox& bbox)
{
  this->MinPnt[0] = bbox.MinPnt[0];
  this->MinPnt[1] = bbox.MinPnt[1];
  this->MinPnt[2] = bbox.MinPnt[2];
 
  this->MaxPnt[0] = bbox.MaxPnt[0];
  this->MaxPnt[1] = bbox.MaxPnt[1];
  this->MaxPnt[2] = bbox.MaxPnt[2];
  return *this;
}
 
inline bool vtkBoundingBox::operator==(const vtkBoundingBox& bbox) const
{
  return ((this->MinPnt[0] == bbox.MinPnt[0]) && (this->MinPnt[1] == bbox.MinPnt[1]) &&
    (this->MinPnt[2] == bbox.MinPnt[2]) && (this->MaxPnt[0] == bbox.MaxPnt[0]) &&
    (this->MaxPnt[1] == bbox.MaxPnt[1]) && (this->MaxPnt[2] == bbox.MaxPnt[2]));
}
 
inline bool vtkBoundingBox::operator!=(const vtkBoundingBox& bbox) const
{
  return !((*this) == bbox);
}
 
inline void vtkBoundingBox::SetMinPoint(double p[3])
{
  this->SetMinPoint(p[0], p[1], p[2]);
}
 
inline void vtkBoundingBox::SetMaxPoint(double p[3])
{
  this->SetMaxPoint(p[0], p[1], p[2]);
}
 
inline void vtkBoundingBox::GetMinPoint(double& x, double& y, double& z) const
{
  x = this->MinPnt[0];
  y = this->MinPnt[1];
  z = this->MinPnt[2];
}
 
inline void vtkBoundingBox::GetMaxPoint(double& x, double& y, double& z) const
{
  x = this->MaxPnt[0];
  y = this->MaxPnt[1];
  z = this->MaxPnt[2];
}
 
inline vtkTypeBool vtkBoundingBox::ContainsPoint(double px, double py, double pz) const
{
  if ((px < this->MinPnt[0]) || (px > this->MaxPnt[0]))
  {
    return 0;
  }
  if ((py < this->MinPnt[1]) || (py > this->MaxPnt[1]))
  {
    return 0;
  }
  if ((pz < this->MinPnt[2]) || (pz > this->MaxPnt[2]))
  {
    return 0;
  }
  return 1;
}
 
inline vtkTypeBool vtkBoundingBox::ContainsPoint(const double p[3]) const
{
  return this->ContainsPoint(p[0], p[1], p[2]);
}
 
template <class PointT>
inline bool vtkBoundingBox::ContainsPoint(const PointT& p) const
{
  return this->ContainsPoint(p[0], p[1], p[2]);
}
 
inline void vtkBoundingBox::GetCorner(int corner, double p[3]) const
{
  if ((corner < 0) || (corner > 7))
  {
    p[0] = VTK_DOUBLE_MAX;
    p[1] = VTK_DOUBLE_MAX;
    p[2] = VTK_DOUBLE_MAX;
    return; // out of bounds
  }
 
  int ix = (corner & 1) ? 1 : 0;        // 0,1,0,1,0,1,0,1
  int iy = ((corner >> 1) & 1) ? 1 : 0; // 0,0,1,1,0,0,1,1
  int iz = (corner >> 2) ? 1 : 0;       // 0,0,0,0,1,1,1,1
 
  const double* pts[2] = { this->MinPnt, this->MaxPnt };
  p[0] = pts[ix][0];
  p[1] = pts[iy][1];
  p[2] = pts[iz][2];
}
 
VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkBoundingBox.h