1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Corporation code.
16 : *
17 : * The Initial Developer of the Original Code is Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2011
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Matt Woodrow <mwoodrow@mozilla.com>
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef MOZILLA_BASEPOINT3D_H_
39 : #define MOZILLA_BASEPOINT3D_H_
40 :
41 : namespace mozilla {
42 : namespace gfx {
43 :
44 : /**
45 : * Do not use this class directly. Subclass it, pass that subclass as the
46 : * Sub parameter, and only use that subclass. This allows methods to safely
47 : * cast 'this' to 'Sub*'.
48 : */
49 : template <class T, class Sub>
50 : struct BasePoint3D {
51 : T x, y, z;
52 :
53 : // Constructors
54 0 : BasePoint3D() : x(0), y(0), z(0) {}
55 0 : BasePoint3D(T aX, T aY, T aZ) : x(aX), y(aY), z(aZ) {}
56 :
57 : void MoveTo(T aX, T aY, T aZ) { x = aX; y = aY; z = aZ; }
58 : void MoveBy(T aDx, T aDy, T aDz) { x += aDx; y += aDy; z += aDz; }
59 :
60 : // Note that '=' isn't defined so we'll get the
61 : // compiler generated default assignment operator
62 :
63 0 : T& operator[](int aIndex) {
64 0 : NS_ABORT_IF_FALSE(aIndex >= 0 && aIndex <= 2, "Invalid array index");
65 0 : return *((&x)+aIndex);
66 : }
67 :
68 : const T& operator[](int aIndex) const {
69 : NS_ABORT_IF_FALSE(aIndex >= 0 && aIndex <= 2, "Invalid array index");
70 : return *((&x)+aIndex);
71 : }
72 :
73 : bool operator==(const Sub& aPoint) const {
74 : return x == aPoint.x && y == aPoint.y && z == aPoint.z;
75 : }
76 0 : bool operator!=(const Sub& aPoint) const {
77 0 : return x != aPoint.x || y != aPoint.y || z != aPoint.z;
78 : }
79 :
80 0 : Sub operator+(const Sub& aPoint) const {
81 0 : return Sub(x + aPoint.x, y + aPoint.y, z + aPoint.z);
82 : }
83 0 : Sub operator-(const Sub& aPoint) const {
84 0 : return Sub(x - aPoint.x, y - aPoint.y, z - aPoint.z);
85 : }
86 : Sub& operator+=(const Sub& aPoint) {
87 : x += aPoint.x;
88 : y += aPoint.y;
89 : z += aPoint.z;
90 : return *static_cast<Sub*>(this);
91 : }
92 : Sub& operator-=(const Sub& aPoint) {
93 : x -= aPoint.x;
94 : y -= aPoint.y;
95 : z -= aPoint.z;
96 : return *static_cast<Sub*>(this);
97 : }
98 :
99 0 : Sub operator*(T aScale) const {
100 0 : return Sub(x * aScale, y * aScale, z * aScale);
101 : }
102 : Sub operator/(T aScale) const {
103 : return Sub(x / aScale, y / aScale, z / aScale);
104 : }
105 :
106 0 : Sub& operator*=(T aScale) {
107 0 : x *= aScale;
108 0 : y *= aScale;
109 0 : z *= aScale;
110 0 : return *static_cast<Sub*>(this);
111 : }
112 :
113 : Sub& operator/=(T aScale) {
114 : x /= aScale;
115 : y /= aScale;
116 : z /= aScale;
117 : return *static_cast<Sub*>(this);
118 : }
119 :
120 0 : Sub operator-() const {
121 0 : return Sub(-x, -y, -z);
122 : }
123 :
124 0 : Sub CrossProduct(const Sub& aPoint) const {
125 : return Sub(y * aPoint.z - aPoint.y * z,
126 : z * aPoint.x - aPoint.z * x,
127 0 : x * aPoint.y - aPoint.x * y);
128 : }
129 :
130 0 : T DotProduct(const Sub& aPoint) const {
131 0 : return x * aPoint.x + y * aPoint.y + z * aPoint.z;
132 : }
133 :
134 : T Length() const {
135 : return sqrt(x*x + y*y + z*z);
136 : }
137 :
138 : // Invalid for points with distance from origin of 0.
139 : void Normalize() {
140 : *this /= Length();
141 : }
142 : };
143 :
144 : }
145 : }
146 :
147 : #endif /* MOZILLA_BASEPOINT3D_H_ */
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