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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_VECTOR_H
#define ANDROID_HWUI_VECTOR_H
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Classes
///////////////////////////////////////////////////////////////////////////////
struct Vector2 {
float x;
float y;
Vector2() :
x(0.0f), y(0.0f) {
}
Vector2(float px, float py) :
x(px), y(py) {
}
float length() const {
return sqrt(x * x + y * y);
}
void operator+=(const Vector2& v) {
x += v.x;
y += v.y;
}
void operator-=(const Vector2& v) {
x -= v.x;
y -= v.y;
}
void operator+=(const float v) {
x += v;
y += v;
}
void operator-=(const float v) {
x -= v;
y -= v;
}
void operator/=(float s) {
x /= s;
y /= s;
}
void operator*=(float s) {
x *= s;
y *= s;
}
Vector2 operator+(const Vector2& v) const {
return Vector2(x + v.x, y + v.y);
}
Vector2 operator-(const Vector2& v) const {
return Vector2(x - v.x, y - v.y);
}
Vector2 operator/(float s) const {
return Vector2(x / s, y / s);
}
Vector2 operator*(float s) const {
return Vector2(x * s, y * s);
}
void normalize() {
float s = 1.0f / length();
x *= s;
y *= s;
}
Vector2 copyNormalized() const {
Vector2 v(x, y);
v.normalize();
return v;
}
float dot(const Vector2& v) const {
return x * v.x + y * v.y;
}
void dump() {
ALOGD("Vector2[%.2f, %.2f]", x, y);
}
}; // class Vector2
///////////////////////////////////////////////////////////////////////////////
// Types
///////////////////////////////////////////////////////////////////////////////
typedef Vector2 vec2;
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_VECTOR_H
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