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 // Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef COBALT_MATH_POINT_BASE_H_ #define COBALT_MATH_POINT_BASE_H_ #include namespace cobalt { namespace math { // A point has an x and y coordinate. template class PointBase { public: Type x() const { return x_; } Type y() const { return y_; } void SetPoint(Type x, Type y) { x_ = x; y_ = y; } void set_x(Type x) { x_ = x; } void set_y(Type y) { y_ = y; } void Offset(Type delta_x, Type delta_y) { x_ += delta_x; y_ += delta_y; } void operator+=(const VectorClass& vector) { x_ += vector.x(); y_ += vector.y(); } void operator-=(const VectorClass& vector) { x_ -= vector.x(); y_ -= vector.y(); } void SetToMin(const Class& other) { x_ = x_ <= other.x_ ? x_ : other.x_; y_ = y_ <= other.y_ ? y_ : other.y_; } void SetToMax(const Class& other) { x_ = x_ >= other.x_ ? x_ : other.x_; y_ = y_ >= other.y_ ? y_ : other.y_; } bool IsOrigin() const { return x_ == Type(0) && y_ == Type(0); } VectorClass OffsetFromOrigin() const { return VectorClass(x_, y_); } // A point is less than another point if its y-value is closer // to the origin. If the y-values are the same, then point with // the x-value closer to the origin is considered less than the // other. // This comparison is required to use Point in sets, or sorted // vectors. bool operator<(const Class& rhs) const { return (y_ == rhs.y_) ? (x_ < rhs.x_) : (y_ < rhs.y_); } protected: PointBase() {} PointBase(Type x, Type y) : x_(x), y_(y) {} // Destructor is intentionally made non virtual and protected. // Do not make this public. ~PointBase() {} private: Type x_; Type y_; }; } // namespace math } // namespace cobalt #endif // COBALT_MATH_POINT_BASE_H_