DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (bf5e67b06638)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_BASEPOINT4D_H_
#define MOZILLA_BASEPOINT4D_H_

#include "mozilla/Assertions.h"

namespace mozilla {
namespace gfx {

/**
 * Do not use this class directly. Subclass it, pass that subclass as the
 * Sub parameter, and only use that subclass. This allows methods to safely
 * cast 'this' to 'Sub*'.
 */
template <class T, class Sub>
struct BasePoint4D {
  union {
    struct {
      T x, y, z, w;
    };
    T components[4];
  };

  // Constructors
  BasePoint4D() : x(0), y(0), z(0), w(0) {}
  BasePoint4D(T aX, T aY, T aZ, T aW) : x(aX), y(aY), z(aZ), w(aW) {}

  void MoveTo(T aX, T aY, T aZ, T aW) {
    x = aX;
    y = aY;
    z = aZ;
    w = aW;
  }
  void MoveBy(T aDx, T aDy, T aDz, T aDw) {
    x += aDx;
    y += aDy;
    z += aDz;
    w += aDw;
  }

  // Note that '=' isn't defined so we'll get the
  // compiler generated default assignment operator

  bool operator==(const Sub& aPoint) const {
    return x == aPoint.x && y == aPoint.y && z == aPoint.z && w == aPoint.w;
  }
  bool operator!=(const Sub& aPoint) const {
    return x != aPoint.x || y != aPoint.y || z != aPoint.z || w != aPoint.w;
  }

  Sub operator+(const Sub& aPoint) const {
    return Sub(x + aPoint.x, y + aPoint.y, z + aPoint.z, w + aPoint.w);
  }
  Sub operator-(const Sub& aPoint) const {
    return Sub(x - aPoint.x, y - aPoint.y, z - aPoint.z, w - aPoint.w);
  }
  Sub& operator+=(const Sub& aPoint) {
    x += aPoint.x;
    y += aPoint.y;
    z += aPoint.z;
    w += aPoint.w;
    return *static_cast<Sub*>(this);
  }
  Sub& operator-=(const Sub& aPoint) {
    x -= aPoint.x;
    y -= aPoint.y;
    z -= aPoint.z;
    w -= aPoint.w;
    return *static_cast<Sub*>(this);
  }

  Sub operator*(T aScale) const {
    return Sub(x * aScale, y * aScale, z * aScale, w * aScale);
  }
  Sub operator/(T aScale) const {
    return Sub(x / aScale, y / aScale, z / aScale, w / aScale);
  }

  Sub& operator*=(T aScale) {
    x *= aScale;
    y *= aScale;
    z *= aScale;
    w *= aScale;
    return *static_cast<Sub*>(this);
  }

  Sub& operator/=(T aScale) {
    x /= aScale;
    y /= aScale;
    z /= aScale;
    w /= aScale;
    return *static_cast<Sub*>(this);
  }

  Sub operator-() const { return Sub(-x, -y, -z, -w); }

  T& operator[](int aIndex) {
    MOZ_ASSERT(aIndex >= 0 && aIndex <= 3, "Invalid array index");
    return *((&x) + aIndex);
  }

  const T& operator[](int aIndex) const {
    MOZ_ASSERT(aIndex >= 0 && aIndex <= 3, "Invalid array index");
    return *((&x) + aIndex);
  }

  T DotProduct(const Sub& aPoint) const {
    return x * aPoint.x + y * aPoint.y + z * aPoint.z + w * aPoint.w;
  }

  // Ignores the 4th component!
  Sub CrossProduct(const Sub& aPoint) const {
    return Sub(y * aPoint.z - aPoint.y * z, z * aPoint.x - aPoint.z * x,
               x * aPoint.y - aPoint.x * y, 0);
  }

  T Length() const { return sqrt(x * x + y * y + z * z + w * w); }

  void Normalize() { *this /= Length(); }

  bool HasPositiveWCoord() { return w > 0; }
};

}  // namespace gfx
}  // namespace mozilla

#endif /* MOZILLA_BASEPOINT4D_H_ */