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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 UI_GFX_POINT3_F_H_
#define UI_GFX_POINT3_F_H_
#include <string>
#include "ui/gfx/gfx_export.h"
#include "ui/gfx/point_f.h"
#include "ui/gfx/vector3d_f.h"
namespace gfx {
// A point has an x, y and z coordinate.
class UI_EXPORT 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.
UI_EXPORT Point3F operator+(const Point3F& lhs, const Vector3dF& rhs);
// Subtract a vector from a point, producing a new point offset by the vector's
// inverse.
UI_EXPORT 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.
UI_EXPORT 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 gfx
#endif // UI_GFX_POINT3_F_H_
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