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 // Copyright (c) 2011 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_POINT3_F_H_ #define COBALT_MATH_POINT3_F_H_ #include #include #include "cobalt/math/point_f.h" #include "cobalt/math/vector3d_f.h" namespace cobalt { namespace math { // A point has an x, y and z coordinate. class Point3F { public: Point3F() : x_(0), y_(0), z_(0) {} Point3F(float x, float y, float z) : x_(x), y_(y), z_(z) {} explicit Point3F(const PointF& point) : x_(point.x()), y_(point.y()), z_(0) {} ~Point3F() {} void Scale(float scale) { Scale(scale, scale, scale); } void Scale(float x_scale, float y_scale, float z_scale) { SetPoint(x() * x_scale, y() * y_scale, z() * z_scale); } float x() const { return x_; } float y() const { return y_; } float z() const { return z_; } void set_x(float x) { x_ = x; } void set_y(float y) { y_ = y; } void set_z(float z) { z_ = z; } void SetPoint(float x, float y, float z) { x_ = x; y_ = y; z_ = z; } // Offset the point by the given vector. void operator+=(const Vector3dF& v) { x_ += v.x(); y_ += v.y(); z_ += v.z(); } // Offset the point by the given vector's inverse. void operator-=(const Vector3dF& v) { x_ -= v.x(); y_ -= v.y(); z_ -= v.z(); } // Returns the squared euclidean distance between two points. float SquaredDistanceTo(const Point3F& other) const { float dx = x_ - other.x_; float dy = y_ - other.y_; float dz = z_ - other.z_; return dx * dx + dy * dy + dz * dz; } PointF AsPointF() const { return PointF(x_, y_); } // Returns a string representation of 3d point. std::string ToString() const; private: float x_; float y_; float z_; // copy/assign are allowed. }; inline bool operator==(const Point3F& lhs, const Point3F& rhs) { return lhs.x() == rhs.x() && lhs.y() == rhs.y() && lhs.z() == rhs.z(); } inline bool operator!=(const Point3F& lhs, const Point3F& rhs) { return !(lhs == rhs); } // Add a vector to a point, producing a new point offset by the vector. Point3F operator+(const Point3F& lhs, const Vector3dF& rhs); // Subtract a vector from a point, producing a new point offset by the vector's // inverse. Point3F operator-(const Point3F& lhs, const Vector3dF& rhs); // Subtract one point from another, producing a vector that represents the // distances between the two points along each axis. Vector3dF operator-(const Point3F& lhs, const Point3F& rhs); inline Point3F PointAtOffsetFromOrigin(const Vector3dF& offset) { return Point3F(offset.x(), offset.y(), offset.z()); } inline Point3F ScalePoint(const Point3F& p, float x_scale, float y_scale, float z_scale) { return Point3F(p.x() * x_scale, p.y() * y_scale, p.z() * z_scale); } inline Point3F ScalePoint(const Point3F& p, float scale) { return ScalePoint(p, scale, scale, scale); } } // namespace math } // namespace cobalt #endif // COBALT_MATH_POINT3_F_H_