Vector.h revision 7b4516e7ea552ad08d6e7277d311ef11bd8f12e8 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HWUI_VECTOR_H
18#define ANDROID_HWUI_VECTOR_H
19
20namespace android {
21namespace uirenderer {
22
23///////////////////////////////////////////////////////////////////////////////
24// Classes
25///////////////////////////////////////////////////////////////////////////////
26
27struct Vector2 {
28    float x;
29    float y;
30
31    Vector2() :
32        x(0.0f), y(0.0f) {
33    }
34
35    Vector2(float px, float py) :
36        x(px), y(py) {
37    }
38
39    float lengthSquared() const {
40        return x * x + y * y;
41    }
42
43    float length() const {
44        return sqrt(x * x + y * y);
45    }
46
47    void operator+=(const Vector2& v) {
48        x += v.x;
49        y += v.y;
50    }
51
52    void operator-=(const Vector2& v) {
53        x -= v.x;
54        y -= v.y;
55    }
56
57    void operator+=(const float v) {
58        x += v;
59        y += v;
60    }
61
62    void operator-=(const float v) {
63        x -= v;
64        y -= v;
65    }
66
67    void operator/=(float s) {
68        x /= s;
69        y /= s;
70    }
71
72    void operator*=(float s) {
73        x *= s;
74        y *= s;
75    }
76
77    Vector2 operator+(const Vector2& v) const {
78        return Vector2(x + v.x, y + v.y);
79    }
80
81    Vector2 operator-(const Vector2& v) const {
82        return Vector2(x - v.x, y - v.y);
83    }
84
85    Vector2 operator/(float s) const {
86        return Vector2(x / s, y / s);
87    }
88
89    Vector2 operator*(float s) const {
90        return Vector2(x * s, y * s);
91    }
92
93    void normalize() {
94        float s = 1.0f / length();
95        x *= s;
96        y *= s;
97    }
98
99    Vector2 copyNormalized() const {
100        Vector2 v(x, y);
101        v.normalize();
102        return v;
103    }
104
105    float dot(const Vector2& v) const {
106        return x * v.x + y * v.y;
107    }
108
109    void dump() {
110        ALOGD("Vector2[%.2f, %.2f]", x, y);
111    }
112}; // class Vector2
113
114class Vector3 {
115public:
116    float x;
117    float y;
118    float z;
119
120    Vector3() :
121        x(0.0f), y(0.0f), z(0.0f) {
122    }
123
124    Vector3(float px, float py, float pz) :
125        x(px), y(py), z(pz) {
126    }
127};
128
129///////////////////////////////////////////////////////////////////////////////
130// Types
131///////////////////////////////////////////////////////////////////////////////
132
133typedef Vector2 vec2;
134
135}; // namespace uirenderer
136}; // namespace android
137
138#endif // ANDROID_HWUI_VECTOR_H
139