LCOV - code coverage report
Current view: top level - dom/media/webaudio - ThreeDPoint.h (source / functions) Hit Total Coverage
Test: output.info Lines: 0 31 0.0 %
Date: 2017-07-14 16:53:18 Functions: 0 8 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef ThreeDPoint_h_
       8             : #define ThreeDPoint_h_
       9             : 
      10             : #include <cmath>
      11             : #include <algorithm>
      12             : 
      13             : namespace mozilla {
      14             : 
      15             : namespace dom {
      16             : 
      17             : struct ThreeDPoint final
      18             : {
      19           0 :   ThreeDPoint()
      20           0 :     : x(0.)
      21             :     , y(0.)
      22           0 :     , z(0.)
      23             :   {
      24           0 :   }
      25           0 :   ThreeDPoint(double aX, double aY, double aZ)
      26           0 :     : x(aX)
      27             :     , y(aY)
      28           0 :     , z(aZ)
      29             :   {
      30           0 :   }
      31             : 
      32           0 :   double Magnitude() const
      33             :   {
      34           0 :     return sqrt(x * x + y * y + z * z);
      35             :   }
      36             : 
      37           0 :   void Normalize()
      38             :   {
      39             :     // Zero vectors cannot be normalized. For our purpose, normalizing a zero
      40             :     // vector results in a zero vector.
      41           0 :     if (IsZero()) {
      42           0 :       return;
      43             :     }
      44             :     // Normalize with the maximum norm first to avoid overflow and underflow.
      45           0 :     double invMax = 1 / MaxNorm();
      46           0 :     x *= invMax;
      47           0 :     y *= invMax;
      48           0 :     z *= invMax;
      49             : 
      50           0 :     double invDistance = 1 / Magnitude();
      51           0 :     x *= invDistance;
      52           0 :     y *= invDistance;
      53           0 :     z *= invDistance;
      54             :   }
      55             : 
      56           0 :   ThreeDPoint CrossProduct(const ThreeDPoint& rhs) const
      57             :   {
      58           0 :     return ThreeDPoint(y * rhs.z - z * rhs.y,
      59           0 :                        z * rhs.x - x * rhs.z,
      60           0 :                        x * rhs.y - y * rhs.x);
      61             :   }
      62             : 
      63           0 :   double DotProduct(const ThreeDPoint& rhs)
      64             :   {
      65           0 :     return x * rhs.x + y * rhs.y + z * rhs.z;
      66             :   }
      67             : 
      68           0 :   bool IsZero() const
      69             :   {
      70           0 :     return x == 0 && y == 0 && z == 0;
      71             :   }
      72             : 
      73             :   // For comparing two vectors of close to unit magnitude.
      74             :   bool FuzzyEqual(const ThreeDPoint& other);
      75             : 
      76             :   double x, y, z;
      77             : 
      78             : private:
      79           0 :   double MaxNorm() const
      80             :   {
      81           0 :     return std::max(fabs(x), std::max(fabs(y), fabs(z)));
      82             :   }
      83             : };
      84             : 
      85             : ThreeDPoint operator-(const ThreeDPoint& lhs, const ThreeDPoint& rhs);
      86             : ThreeDPoint operator*(const ThreeDPoint& lhs, const ThreeDPoint& rhs);
      87             : ThreeDPoint operator*(const ThreeDPoint& lhs, const double rhs);
      88             : bool operator==(const ThreeDPoint& lhs, const ThreeDPoint& rhs);
      89             : 
      90             : } // namespace dom
      91             : } // namespace mozilla
      92             : 
      93             : #endif
      94             : 

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