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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.
- // Defines a simple float vector class. This class is used to indicate a
- // distance in two dimensions between two points. Subtracting two points should
- // produce a vector, and adding a vector to a point produces the point at the
- // vector's distance from the original point.
- #ifndef UI_GFX_GEOMETRY_VECTOR3D_F_H_
- #define UI_GFX_GEOMETRY_VECTOR3D_F_H_
- #include <iosfwd>
- #include <string>
- #include "ui/gfx/geometry/geometry_export.h"
- #include "ui/gfx/geometry/vector2d_f.h"
- namespace gfx {
- class GEOMETRY_EXPORT Vector3dF {
- public:
- constexpr Vector3dF() : x_(0), y_(0), z_(0) {}
- constexpr Vector3dF(float x, float y, float z) : x_(x), y_(y), z_(z) {}
- constexpr explicit Vector3dF(const Vector2dF& other)
- : x_(other.x()), y_(other.y()), z_(0) {}
- constexpr float x() const { return x_; }
- void set_x(float x) { x_ = x; }
- constexpr float y() const { return y_; }
- void set_y(float y) { y_ = y; }
- constexpr float z() const { return z_; }
- void set_z(float z) { z_ = z; }
- // True if all components of the vector are 0.
- bool IsZero() const;
- // Add the components of the |other| vector to the current vector.
- void Add(const Vector3dF& other);
- // Subtract the components of the |other| vector from the current vector.
- void Subtract(const Vector3dF& other);
- void operator+=(const Vector3dF& other) { Add(other); }
- void operator-=(const Vector3dF& other) { Subtract(other); }
- void SetToMin(const Vector3dF& other) {
- x_ = x_ <= other.x_ ? x_ : other.x_;
- y_ = y_ <= other.y_ ? y_ : other.y_;
- z_ = z_ <= other.z_ ? z_ : other.z_;
- }
- void SetToMax(const Vector3dF& other) {
- x_ = x_ >= other.x_ ? x_ : other.x_;
- y_ = y_ >= other.y_ ? y_ : other.y_;
- z_ = z_ >= other.z_ ? z_ : other.z_;
- }
- // Gives the square of the diagonal length of the vector.
- double LengthSquared() const;
- // Gives the diagonal length of the vector.
- float Length() const;
- // Scale all components of the vector by |scale|.
- void Scale(float scale) { Scale(scale, scale, scale); }
- // Scale the each component of the vector by the given scale factors.
- void Scale(float x_scale, float y_scale, float z_scale);
- // Take the cross product of this vector with |other| and become the result.
- void Cross(const Vector3dF& other);
- // |out| is assigned a unit-length vector in the direction of |this| iff
- // this function returns true. It can return false if |this| is too short.
- bool GetNormalized(Vector3dF* out) const;
- std::string ToString() const;
- private:
- float x_;
- float y_;
- float z_;
- };
- inline bool operator==(const Vector3dF& lhs, const Vector3dF& rhs) {
- return lhs.x() == rhs.x() && lhs.y() == rhs.y() && lhs.z() == rhs.z();
- }
- inline bool operator!=(const Vector3dF& lhs, const Vector3dF& rhs) {
- return !(lhs == rhs);
- }
- inline Vector3dF operator-(const Vector3dF& v) {
- return Vector3dF(-v.x(), -v.y(), -v.z());
- }
- inline Vector3dF operator+(const Vector3dF& lhs, const Vector3dF& rhs) {
- Vector3dF result = lhs;
- result.Add(rhs);
- return result;
- }
- inline Vector3dF operator-(const Vector3dF& lhs, const Vector3dF& rhs) {
- Vector3dF result = lhs;
- result.Add(-rhs);
- return result;
- }
- // Return the cross product of two vectors.
- inline Vector3dF CrossProduct(const Vector3dF& lhs, const Vector3dF& rhs) {
- Vector3dF result = lhs;
- result.Cross(rhs);
- return result;
- }
- // Return the dot product of two vectors.
- GEOMETRY_EXPORT float DotProduct(const Vector3dF& lhs, const Vector3dF& rhs);
- // Return a vector that is |v| scaled by the given scale factors along each
- // axis.
- GEOMETRY_EXPORT Vector3dF ScaleVector3d(const Vector3dF& v,
- float x_scale,
- float y_scale,
- float z_scale);
- // Return a vector that is |v| scaled by the components of |s|
- inline Vector3dF ScaleVector3d(const Vector3dF& v, const Vector3dF& s) {
- return ScaleVector3d(v, s.x(), s.y(), s.z());
- }
- // Return a vector that is |v| scaled by the given scale factor.
- inline Vector3dF ScaleVector3d(const Vector3dF& v, float scale) {
- return ScaleVector3d(v, scale, scale, scale);
- }
- // Returns the angle between |base| and |other| in degrees.
- GEOMETRY_EXPORT float AngleBetweenVectorsInDegrees(const gfx::Vector3dF& base,
- const gfx::Vector3dF& other);
- // Returns the clockwise angle between |base| and |other| where |normal| is the
- // normal of the virtual surface to measure clockwise according to.
- GEOMETRY_EXPORT float ClockwiseAngleBetweenVectorsInDegrees(
- const gfx::Vector3dF& base,
- const gfx::Vector3dF& other,
- const gfx::Vector3dF& normal);
- // This is declared here for use in gtest-based unit tests but is defined in
- // the //ui/gfx:test_support target. Depend on that to use this in your unit
- // test. This should not be used in production code - call ToString() instead.
- void PrintTo(const Vector3dF& vector, ::std::ostream* os);
- } // namespace gfx
- #endif // UI_GFX_GEOMETRY_VECTOR3D_F_H_
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