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
20#include <math.h>
21#include <utils/Log.h>
22
23namespace android {
24namespace uirenderer {
25
26///////////////////////////////////////////////////////////////////////////////
27// Classes
28///////////////////////////////////////////////////////////////////////////////
29
30// MUST BE A POD - this means no ctor or dtor!
31struct Vector2 {
32    float x;
33    float y;
34
35    float lengthSquared() const { return x * x + y * y; }
36
37    float length() const { return sqrt(x * x + y * y); }
38
39    void operator+=(const Vector2& v) {
40        x += v.x;
41        y += v.y;
42    }
43
44    void operator-=(const Vector2& v) {
45        x -= v.x;
46        y -= v.y;
47    }
48
49    void operator+=(const float v) {
50        x += v;
51        y += v;
52    }
53
54    void operator-=(const float v) {
55        x -= v;
56        y -= v;
57    }
58
59    void operator/=(float s) {
60        x /= s;
61        y /= s;
62    }
63
64    void operator*=(float s) {
65        x *= s;
66        y *= s;
67    }
68
69    Vector2 operator+(const Vector2& v) const { return (Vector2){x + v.x, y + v.y}; }
70
71    Vector2 operator-(const Vector2& v) const { return (Vector2){x - v.x, y - v.y}; }
72
73    Vector2 operator/(float s) const { return (Vector2){x / s, y / s}; }
74
75    Vector2 operator*(float s) const { return (Vector2){x * s, y * s}; }
76
77    void normalize() {
78        float s = 1.0f / length();
79        x *= s;
80        y *= s;
81    }
82
83    Vector2 copyNormalized() const {
84        Vector2 v = {x, y};
85        v.normalize();
86        return v;
87    }
88
89    float dot(const Vector2& v) const { return x * v.x + y * v.y; }
90
91    float cross(const Vector2& v) const { return x * v.y - y * v.x; }
92
93    void dump() { ALOGD("Vector2[%.2f, %.2f]", x, y); }
94};  // class Vector2
95
96// MUST BE A POD - this means no ctor or dtor!
97class Vector3 {
98public:
99    float x;
100    float y;
101    float z;
102
103    Vector3 operator+(const Vector3& v) const { return (Vector3){x + v.x, y + v.y, z + v.z}; }
104
105    Vector3 operator-(const Vector3& v) const { return (Vector3){x - v.x, y - v.y, z - v.z}; }
106
107    Vector3 operator/(float s) const { return (Vector3){x / s, y / s, z / s}; }
108
109    Vector3 operator*(float s) const { return (Vector3){x * s, y * s, z * s}; }
110
111    void dump(const char* label = "Vector3") const {
112        ALOGD("%s[%.2f, %.2f, %.2f]", label, x, y, z);
113    }
114};
115
116};  // namespace uirenderer
117};  // namespace android
118
119#endif  // ANDROID_HWUI_VECTOR_H
120