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 namespace android { 21 namespace uirenderer { 22 23 /////////////////////////////////////////////////////////////////////////////// 24 // Classes 25 /////////////////////////////////////////////////////////////////////////////// 26 27 struct Vector2 { 28 float x; 29 float y; 30 Vector2Vector231 Vector2() : 32 x(0.0f), y(0.0f) { 33 } 34 Vector2Vector235 Vector2(float px, float py) : 36 x(px), y(py) { 37 } 38 lengthVector239 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 normalizeVector289 void normalize() { 90 float s = 1.0f / length(); 91 x *= s; 92 y *= s; 93 } 94 copyNormalizedVector295 Vector2 copyNormalized() const { 96 Vector2 v(x, y); 97 v.normalize(); 98 return v; 99 } 100 dotVector2101 float dot(const Vector2& v) const { 102 return x * v.x + y * v.y; 103 } 104 dumpVector2105 void dump() { 106 ALOGD("Vector2[%.2f, %.2f]", x, y); 107 } 108 }; // class Vector2 109 110 /////////////////////////////////////////////////////////////////////////////// 111 // Types 112 /////////////////////////////////////////////////////////////////////////////// 113 114 typedef Vector2 vec2; 115 116 }; // namespace uirenderer 117 }; // namespace android 118 119 #endif // ANDROID_HWUI_VECTOR_H 120