Vector.h revision 96a5c4c7bab6718524de7253da8309143ab48bef
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 { 36 return x * x + y * y; 37 } 38 39 float length() const { 40 return sqrt(x * x + y * y); 41 } 42 43 void operator+=(const Vector2& v) { 44 x += v.x; 45 y += v.y; 46 } 47 48 void operator-=(const Vector2& v) { 49 x -= v.x; 50 y -= v.y; 51 } 52 53 void operator+=(const float v) { 54 x += v; 55 y += v; 56 } 57 58 void operator-=(const float v) { 59 x -= v; 60 y -= v; 61 } 62 63 void operator/=(float s) { 64 x /= s; 65 y /= s; 66 } 67 68 void operator*=(float s) { 69 x *= s; 70 y *= s; 71 } 72 73 Vector2 operator+(const Vector2& v) const { 74 return (Vector2){x + v.x, y + v.y}; 75 } 76 77 Vector2 operator-(const Vector2& v) const { 78 return (Vector2){x - v.x, y - v.y}; 79 } 80 81 Vector2 operator/(float s) const { 82 return (Vector2){x / s, y / s}; 83 } 84 85 Vector2 operator*(float s) const { 86 return (Vector2){x * s, y * s}; 87 } 88 89 void normalize() { 90 float s = 1.0f / length(); 91 x *= s; 92 y *= s; 93 } 94 95 Vector2 copyNormalized() const { 96 Vector2 v = {x, y}; 97 v.normalize(); 98 return v; 99 } 100 101 float dot(const Vector2& v) const { 102 return x * v.x + y * v.y; 103 } 104 105 float cross(const Vector2& v) const { 106 return x * v.y - y * v.x; 107 } 108 109 void dump() { 110 ALOGD("Vector2[%.2f, %.2f]", x, y); 111 } 112}; // class Vector2 113 114// MUST BE A POD - this means no ctor or dtor! 115class Vector3 { 116public: 117 float x; 118 float y; 119 float z; 120 121 Vector3 operator+(const Vector3& v) const { 122 return (Vector3){x + v.x, y + v.y, z + v.z}; 123 } 124 125 Vector3 operator-(const Vector3& v) const { 126 return (Vector3){x - v.x, y - v.y, z - v.z}; 127 } 128 129 Vector3 operator/(float s) const { 130 return (Vector3){x / s, y / s, z / s}; 131 } 132 133 Vector3 operator*(float s) const { 134 return (Vector3){x * s, y * s, z * s}; 135 } 136 137 138 void dump() { 139 ALOGD("Vector3[%.2f, %.2f, %.2f]", x, y, z); 140 } 141}; 142 143}; // namespace uirenderer 144}; // namespace android 145 146#endif // ANDROID_HWUI_VECTOR_H 147