QGIS API Documentation
3.8.0Zanzibar (11aff65)

A class to represent a vector. More...
#include <qgsvector.h>
Public Member Functions  
QgsVector ()=default  
Default constructor for QgsVector. More...  
QgsVector (double x, double y)  
Constructor for QgsVector taking x and y component values. More...  
double  angle () const 
Returns the angle of the vector in radians. More...  
double  angle (QgsVector v) const 
Returns the angle between this vector and another vector in radians. More...  
double  crossProduct (QgsVector v) const 
Returns the 2D cross product of this vector and another vector v. More...  
double  length () const 
Returns the length of the vector. More...  
double  lengthSquared () const 
Returns the length of the vector. More...  
QgsVector  normalized () const 
Returns the vector's normalized (or "unit") vector (ie same angle but length of 1.0). More...  
bool  operator!= (QgsVector other) const 
Inequality operator. More...  
QgsVector  operator* (double scalar) const 
Returns a vector where the components have been multiplied by a scalar value. More...  
double  operator* (QgsVector v) const 
Returns the dot product of two vectors, which is the sum of the x component of this vector multiplied by the x component of another vector plus the y component of this vector multiplied by the y component of another vector. More...  
QgsVector  operator+ (QgsVector other) const 
Adds another vector to this vector. More...  
QgsVector &  operator+= (QgsVector other) 
Adds another vector to this vector in place. More...  
QgsVector  operator () const 
Swaps the sign of the x and y components of the vector. More...  
QgsVector  operator (QgsVector other) const 
Subtracts another vector to this vector. More...  
QgsVector &  operator= (QgsVector other) 
Subtracts another vector to this vector in place. More...  
QgsVector  operator/ (double scalar) const 
Returns a vector where the components have been divided by a scalar value. More...  
bool  operator== (QgsVector other) const 
Equality operator. More...  
QgsVector  perpVector () const 
Returns the perpendicular vector to this vector (rotated 90 degrees counterclockwise) More...  
QgsVector  rotateBy (double rot) const 
Rotates the vector by a specified angle. More...  
QString  toString (int precision=17) const 
Returns a string representation of the vector. More...  
double  x () const 
Returns the vector's xcomponent. More...  
double  y () const 
Returns the vector's ycomponent. More...  
A class to represent a vector.
Currently no Z axis / 2.5D support is implemented.
Definition at line 29 of file qgsvector.h.

default 
Default constructor for QgsVector.
Creates a vector with length of 0.0.
QgsVector::QgsVector  (  double  x, 
double  y  
) 
Constructor for QgsVector taking x and y component values.
x  xcomponent 
y  ycomponent 
Definition at line 21 of file qgsvector.cpp.
double QgsVector::angle  (  )  const 
Returns the angle of the vector in radians.
Definition at line 91 of file qgsvector.cpp.
double QgsVector::angle  (  QgsVector  v  )  const 
Returns the angle between this vector and another vector in radians.
Definition at line 97 of file qgsvector.cpp.
double QgsVector::crossProduct  (  QgsVector  v  )  const 
Returns the 2D cross product of this vector and another vector v.
(This is sometimes referred to as a "perpendicular dot product", and equals x1 * y1  y1 * x2).
Definition at line 102 of file qgsvector.cpp.
double QgsVector::length  (  )  const 
Returns the length of the vector.
Definition at line 71 of file qgsvector.cpp.

inline 
Returns the length of the vector.
Definition at line 103 of file qgsvector.h.
QgsVector QgsVector::normalized  (  )  const 
Returns the vector's normalized (or "unit") vector (ie same angle but length of 1.0).
Will throw a QgsException if called on a vector with length of 0.
Definition at line 114 of file qgsvector.cpp.
bool QgsVector::operator!=  (  QgsVector  other  )  const 
Inequality operator.
Definition at line 131 of file qgsvector.cpp.
QgsVector QgsVector::operator*  (  double  scalar  )  const 
Returns a vector where the components have been multiplied by a scalar value.
scalar  factor to multiply by 
Definition at line 32 of file qgsvector.cpp.
double QgsVector::operator*  (  QgsVector  v  )  const 
Returns the dot product of two vectors, which is the sum of the x component of this vector multiplied by the x component of another vector plus the y component of this vector multiplied by the y component of another vector.
Definition at line 42 of file qgsvector.cpp.
Adds another vector to this vector in place.
Definition at line 52 of file qgsvector.cpp.
QgsVector QgsVector::operator  (  )  const 
Swaps the sign of the x and y components of the vector.
Definition at line 27 of file qgsvector.cpp.
Subtracts another vector to this vector in place.
Definition at line 64 of file qgsvector.cpp.
QgsVector QgsVector::operator/  (  double  scalar  )  const 
Returns a vector where the components have been divided by a scalar value.
scalar  factor to divide by 
Definition at line 37 of file qgsvector.cpp.
bool QgsVector::operator==  (  QgsVector  other  )  const 
Equality operator.
Definition at line 126 of file qgsvector.cpp.
QgsVector QgsVector::perpVector  (  )  const 
Returns the perpendicular vector to this vector (rotated 90 degrees counterclockwise)
Definition at line 86 of file qgsvector.cpp.
QgsVector QgsVector::rotateBy  (  double  rot  )  const 
Rotates the vector by a specified angle.
rot  angle in radians 
Definition at line 107 of file qgsvector.cpp.

inline 
Returns a string representation of the vector.
Members will be truncated to the specified precision.
Definition at line 166 of file qgsvector.h.
double QgsVector::x  (  )  const 
double QgsVector::y  (  )  const 