Package org.robwork.sdurw_math

Class Vector2Df

  • public class Vector2Df
extends java.lang.Object
    A 2D vector \mathbf{v}\in \mathbb{R}^2

    \robabx{i}{j}{\mathbf{v}} = \left[ \begin{array}{c} v_x \\ v_y \end{array} \right]

    In addition, Vector2D supports the cross product operator:
    v3 = cross(v1, v2)

    Usage example:
    using namespace rw::math; Vector2D<> v1(1.0, 2.0); Vector2D<> v2(6.0, 7.0); Vector2D<> v3 = cross( v1, v2 ); Vector2D<> v4 = v2 - v1;

    • Constructor Detail

      • Vector2Df

        public Vector2Df​(long cPtr,
                 boolean cMemoryOwn)

      • Vector2Df

        public Vector2Df()
        Creates a 2D vector initialized with 0's

      • Vector2Df

        public Vector2Df​(float x,
                 float y)
        Creates a 2D vector

        Parameters:
        x - [in] x

        y - [in] y

      • Vector2Df

        public Vector2Df​(Vector2Df copy)
        Copy Constructor

    • Method Detail

      • getCPtr

        public static long getCPtr​(Vector2Df obj)

      • delete

        public void delete()

      • e

        public EigenVector2f e()
        Returns Eigen vector equivalent to *this.

      • size

        public long size()
        The dimension of the vector (i.e. 2).

        This method is provided to help support generic algorithms using
        size() and operator[].

      • get

        public float get​(long i)

      • set

        public void set​(long i,
                float d)

      • divide

        public Vector2Df divide​(float s)
        Scalar division.

      • multiply

        public Vector2Df multiply​(float s)
        Scalar multiplication.

      • multiplyAssign

        public Vector2Df multiplyAssign​(float s)
        Scalar multiplication.

      • devideAssign

        public Vector2Df devideAssign​(float s)
        Scalar division.

      • negate

        public Vector2Df negate()
        Unary minus.

      • equals

        public boolean equals​(Vector2Df b)
        Compares a and b for equality.
        Parameters:
        b - [in]
        Returns:
        True if a equals b, false otherwise.

      • notEqual

        public boolean notEqual​(Vector2Df b)
        Compares a and b for inequality.
        Parameters:
        b - [in]
        Returns:
        True if a and b are different, false otherwise.

      • angle

        public double angle()
        returns the counter clock-wise angle between
        this vector and the x-axis vector (1,0). The angle
        returned will be in the interval [-Pi,Pi]

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • norm2

        public float norm2()
        Returns the Euclidean norm (2-norm) of the vector
        Returns:
        the norm

      • norm1

        public float norm1()
        Returns the Manhatten norm (1-norm) of the vector
        Returns:
        the norm

      • normInf

        public float normInf()
        Returns the infinte norm ( \inf-norm) of the vector
        Returns:
        the norm