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## igeo
Class IVec2

    java.lang.Object
      igeo.IParameterObject
          igeo.IVec2

All Implemented Interfaces:
  IEntityParameter, IParameter, ISubobject, IVal, IVec2I, IVec2Op

Direct Known Subclasses:
  IPolyline2D.Intersection

    public class IVec2

extends IParameterObject
implements IVec2I, IEntityParameter

Class of 2 dimensional vector.

Author:
  Satoru Sugihara

Field Summary
`double` | `x`
`double` | `y`

Fields inherited from class igeo.IParameterObject
`parent`

Constructor Summary
`IVec2()`
`IVec2(double x, double y)`
`IVec2(IDoubleI x, IDoubleI y)`
`IVec2(IServerI s)`
`IVec2(IServerI s, double x, double y)`
`IVec2(IServerI s, IDoubleI x, IDoubleI y)`
`IVec2(IServerI s, IVec2 v)`
`IVec2(IServerI s, IVec2I v)`
`IVec2(IServerI s, IVecI v)`
`IVec2(IVec2 v)`
`IVec2(IVec2I v)`
`IVec2(IVecI v)`

Method Summary
`IVec2` | `add(double x, double y)`
`IVec2` | `add(double f, IVec2 v)` scale add; alias
`IVec2` | `add(double f, IVec2I v)` scale add; alias
`IVec2` | `add(IDoubleI x, IDoubleI y)`
`IVec2` | `add(IDoubleI f, IVec2I v)` scale add; alias
`IVec2` | `add(IVec2 v)`
`IVec2` | `add(IVec2 v, double f)` scale add
`IVec2` | `add(IVec2I v)`
`IVec2` | `add(IVec2I v, double f)` scale add
`IVec2` | `add(IVec2I v, IDoubleI f)` scale add
`double` | `angle(double vx, double vy)` angle between two vectors
`double` | `angle(ISwitchE e, IVec2I v)` angle between two vectors
`IDouble` | `angle(ISwitchR r, IVec2I v)` angle between two vectors
`double` | `angle(IVec2 v)`
`double` | `angle(IVec2I v)` angle between two vectors
`IVec2` | `bisect(double vx, double vy)` create a new instance of bisector
`IVec2` | `bisect(IVec2 v)` create a new instance of bisector
`IVec2` | `bisect(IVec2I v)` create a new instance of bisector
`IVec2` | `cp()` cp() is alias of dup()
`IVec2` | `cp(double x, double y)` cp() is alias of dup().add()
`IVec2` | `cp(IDoubleI x, IDoubleI y)` cp() is alias of dup().add()
`IVec2` | `cp(IVec2 v)` cp() is alias of dup().add()
`IVec2` | `cp(IVec2I v)` cp() is alias of dup().add()
`IVec` | `cross(double vx, double vy)` cross product in z direction as IVec
`IVec` | `cross(IVec2 v)` cross product in z direction as IVec
`IVec` | `cross(IVec2I v)` cross product in z direction as IVec
`IVec2` | `dif(double vx, double vy)` create a new instance of difference
`IVec2` | `dif(IVec2 v)` create a new instance of difference
`IVec2` | `dif(IVec2I v)` create a new instance of difference
`IVec2` | `diff(double vx, double vy)` alias of dif
`IVec2` | `diff(IVec2 v)` alias of dif
`IVec2` | `diff(IVec2I v)` alias of dif
`double` | `dist(double vx, double vy)` distance of two vectors
`double` | `dist(ISwitchE e, IVec2I v)` distance of two vectors
`IDouble` | `dist(ISwitchR r, IVec2I v)` distance of two vectors
`double` | `dist(IVec2 v)` distance of two vectors
`double` | `dist(IVec2I v)` distance of two vectors
`double` | `dist2(double vx, double vy)` squared distance of two vectors
`double` | `dist2(ISwitchE e, IVec2I v)` squared distance of two vectors
`IDouble` | `dist2(ISwitchR r, IVec2I v)` squared distance of two vectors
`double` | `dist2(IVec2 v)` squared distance of two vectors
`double` | `dist2(IVec2I v)` squared distance of two vectors
`double` | `distToLine(IVec2I lineDir)` distance to a line dir
`double` | `distToLine(IVec2I lineDir, IVec2I linePt)` distance to an infinite line
`double` | `distToLine(IVec2 pt1, IVec2 pt2)`
`double` | `distToSegment(IVec2I linePt1, IVec2I linePt2)` distance to a line segment
`double` | `distToTriangle(IVec2I pt1, IVec2I pt2, IVec2I pt3)` distance to a triangle
`IVec2` | `div(double x)`
`IVec2` | `div(IDouble v)`
`IVec2` | `div(IDoubleI v)`
`double` | `dot(double vx, double vy)` dot product
`double` | `dot(ISwitchE e, IVec2I v)` dot product
`IDouble` | `dot(ISwitchR r, IVec2I v)` dot product
`double` | `dot(IVec2 v)` dot product
`double` | `dot(IVec2I v)` dot product
`IVec2` | `dup()`
`boolean` | `eq(double vx, double vy)` whether location is same or not
`boolean` | `eq(double vx, double vy, double tolerance)` whether location is same or not within tolerance
`boolean` | `eq(ISwitchE e, IVec2I v)` whether location is same or not
`boolean` | `eq(ISwitchE e, IVec2I v, double tolerance)` whether location is same or not within tolerance
`IBool` | `eq(ISwitchR r, IVec2I v)` whether location is same or not
`IBool` | `eq(ISwitchR r, IVec2I v, IDoubleI tolerance)` whether location is same or not within tolerance
`boolean` | `eq(IVec2 v)` whether location is same or not
`boolean` | `eq(IVec2 v, double tolerance)` whether location is same or not within tolerance
`boolean` | `eq(IVec2I v)` whether location is same or not
`boolean` | `eq(IVec2I v, double tolerance)` whether location is same or not within tolerance
`boolean` | `eqX(double vx)` check if same in X
`boolean` | `eqX(double vx, double tolerance)` check if same in X within tolerance
`boolean` | `eqX(ISwitchE e, IVec2I v)` check if same in X
`boolean` | `eqX(ISwitchE e, IVec2I v, double tolerance)` check if same in X within tolerance
`IBool` | `eqX(ISwitchR r, IVec2I v)` check if same in X
`IBool` | `eqX(ISwitchR r, IVec2I v, IDoubleI tolerance)` check if same in X within tolerance
`boolean` | `eqX(IVec2 v)` check if same in X
`boolean` | `eqX(IVec2 v, double tolerance)` check if same in X within tolerance
`boolean` | `eqX(IVec2I v)` check if same in X
`boolean` | `eqX(IVec2I v, double tolerance)` check if same in X within tolerance
`boolean` | `eqY(double vy)` check if same in Y
`boolean` | `eqY(double vy, double tolerance)` check if same in Y within tolerance
`boolean` | `eqY(ISwitchE e, IVec2I v)` check if same in Y
`boolean` | `eqY(ISwitchE e, IVec2I v, double tolerance)` check if same in Y within tolerance
`IBool` | `eqY(ISwitchR r, IVec2I v)` check if same in Y
`IBool` | `eqY(ISwitchR r, IVec2I v, IDoubleI tolerance)` check if same in Y within tolerance
`boolean` | `eqY(IVec2 v)` check if same in Y
`boolean` | `eqY(IVec2 v, double tolerance)` check if same in Y within tolerance
`boolean` | `eqY(IVec2I v)` check if same in Y
`boolean` | `eqY(IVec2I v, double tolerance)` check if same in Y within tolerance
`IVec2` | `flip()` alias of neg
`IVec2` | `get()`
`IDouble` | `getX()`
`IDouble` | `getY()`
`static IVec2` | `intersect(IVec2I pt1, IVec2I dir1, IVec2I pt2, IVec2I dir2)` intersection of two infinite lines
`static IVec2` | `intersectPolygon(IVec2I p1, IVec2I p2, IVec2I[] pts)`
`static IVec2` | `intersectPolyline(IVec2I p1, IVec2I p2, IVec2I[] pts)`
`static IVec2` | `intersectPolyline(IVec2I p1, IVec2I p2, IVec2I[] pts, boolean closed)`
`static IVec2` | `intersectSegment(IVec2I line1pt1, IVec2I line1pt2, IVec2I line2pt1, IVec2I line2pt2)`
`static IVec2` | `intersectSegmentAndXLine(IVec2I linePt1, IVec2I linePt2, double y)`
`static IVec2` | `intersectSegmentAndYLine(IVec2I linePt1, IVec2I linePt2, double x)`
`static IVec2` | `intersectXLine(IVec2 linePt, IVec2 lineDir, double yOfXLine)`
`static IVec2` | `intersectYLine(IVec2 linePt, IVec2 lineDir, double xOfYLine)`
`boolean` | `isBetween(IVec2I pt1, IVec2I pt2)`
`boolean` | `isInside(IVec2[] pts)` determine if the point is insde the polygon defined by the argument true if the point is on the edge of polygon
`boolean` | `isInside(IVec2I[] pts)` determine if the point is insde the polygon defined by the argument
`boolean` | `isOnLine(IVec2 pt1, IVec2 pt2)`
`boolean` | `isParallel(IVec2I v)` check if two vectors are parallel
`boolean` | `isParallel(IVec2I v, double angleReso)` check if two vectors are parallel
`boolean` | `isStraight(IVec2I v1, IVec2I v2)` check if three locations are on straight line
`boolean` | `isStraight(IVec2I v1, IVec2I v2, double angleReso)` check if three locations are on straight line
`boolean` | `isValid()` checking x, y is valid number (not Infinite, nor NaN).
`double` | `len()` getting length
`IVec2` | `len(double l)` setting length
`IVec2` | `len(IDoubleI l)` setting length
`double` | `len(ISwitchE e)` getting length
`IDouble` | `len(ISwitchR r)` getting length
`double` | `len2()` return squared length of the vector in double
`double` | `len2(ISwitchE e)` return squared length of the vector in double
`IDouble` | `len2(ISwitchR r)` return squared length of the vector in double
`IVec2` | `mid(double vx, double vy)` create a new instance of midpoint
`IVec2` | `mid(IVec2 v)` create a new instance of midpoint
`IVec2` | `mid(IVec2I v)` create a new instance of midpoint
`IVec2` | `mirror(double lineX, double lineY)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `mirror(double linePtX, double linePtY, double lineDirX, double lineDirY)` reflect (mirror) 2 dimensionally to the other side of the line at line point
`IVec2` | `mirror(IVec2 lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `mirror(IVec2I lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `mirror(IVec2I linePt, IVec2I lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `mirror(IVec2 linePt, IVec2 lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `mul(double x)`
`IVec2` | `mul(IDouble v)`
`IVec2` | `mul(IDoubleI v)`
`IVec2` | `mv(double x, double y)` mv() is alias of add()
`IVec2` | `mv(IDoubleI x, IDoubleI y)` mv() is alias of add()
`IVec2` | `mv(IVec2 v)` mv() is alias of add()
`IVec2` | `mv(IVec2I v)` mv() is alias of add()
`IVec2` | `neg()`
`IVecI` | `nml(double vx, double vy)` alias of cross
`IVecI` | `nml(double vx1, double vy1, double vx2, double vy2)` create normal vector from 3 points of self, pt1 and pt2
`IVec` | `nml(IVec2 v)` alias of cross
`IVec` | `nml(IVec2I v)` alias of cross
`IVecI` | `nml(IVec2I pt1, IVec2I pt2)` create normal vector from 3 points of self, pt1 and pt2
`IVecI` | `nml(IVec2 pt1, IVec2 pt2)` create normal vector from 3 points of self, pt1 and pt2
`IVec2` | `ortho()` rotate vector in Pi/2
`IVec2` | `perpendicularVecToLine(IVec2I lineDir)` create a new vector from line to this point perpendicular to the line dir
`IVec2` | `perpendicularVecToLine(IVec2I lineDir, IVec2I linePt)` create a new vector from this point to the line in parpendicular direction.
`double[]` | `projectTo2Vec(IVec2I v1, IVec2I v2)` project the vector to the plane defined by two input vector and decompose vector to two vector and another perpendicular vector and returns coefficient of them.
`double` | `ratioOnSegment(IVec2I linePt1, IVec2I linePt2)` ratio of projected point between two points (line segment).
`IVec2` | `ref(double lineX, double lineY)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `ref(double linePtX, double linePtY, double lineDirX, double lineDirY)` reflect (mirror) 2 dimensionally to the other side of the line at line point
`IVec2` | `ref(IVec2 lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `ref(IVec2I lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `ref(IVec2I linePt, IVec2I lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`IVec2` | `ref(IVec2 linePt, IVec2 lineDir)` reflect (mirror) 2 dimensionally to the other side of the line
`static IVec2I[]` | `removeDuplicatedPoints(IVec2I[] pts, boolean closed)`
`static IVec2I[]` | `removeStraightPoints(IVec2I[] pts, boolean closed)` remove points which are on straight line of adjacents
`IVec2` | `rev()` alias of neg
`IVec2` | `rot(double angle)` rotate
`IVec2` | `rot(double centerX, double centerY, double angle)` rotate around center
`IVec2` | `rot(IDoubleI angle)` rotate
`IVec2` | `rot(IVec2 destDir)` rotate towards destination direction
`IVec2` | `rot(IVec2 center, double angle)` rotate around center
`IVec2` | `rot(IVec2I destDir)` rotate towards destination direction
`IVec2` | `rot(IVec2I center, double angle)` rotate around center
`IVec2` | `rot(IVec2I center, IDoubleI angle)` rotate around center
`IVec2` | `rot(IVec2I center, IVec2I destPt)` rotate around center towards destination point
`IVec2` | `rot(IVec2 center, IVec2 destPt)` rotate around center towards destination point
`IVec2` | `scale(double f)` alias of mul
`IVec2` | `scale(double centerX, double centerY, double f)` scale around center
`IVec2` | `scale(IDoubleI f)` alias of mul
`IVec2` | `scale(IVec2 center, double f)` scale around center
`IVec2` | `scale(IVec2I center, double f)` scale around center
`IVec2` | `scale(IVec2I center, IDoubleI f)` scale around center
`IVec2` | `scale1d(double axisX, double axisY, double f)` scale only in 1 direction
`IVec2` | `scale1d(double centerX, double centerY, double axisX, double axisY, double f)` scale only in 1 direction from a center
`IVec2` | `scale1d(IVec2 axis, double f)` scale only in 1 direction
`IVec2` | `scale1d(IVec2I axis, double f)` scale only in 1 direction
`IVec2` | `scale1d(IVec2I axis, IDoubleI f)` scale only in 1 direction
`IVec2` | `scale1d(IVec2I center, IVec2I axis, double f)` scale only in 1 direction from a center
`IVec2` | `scale1d(IVec2I center, IVec2I axis, IDoubleI f)` scale only in 1 direction from a center
`IVec2` | `scale1d(IVec2 center, IVec2 axis, double f)` scale only in 1 direction from a center
`IVec2` | `set(double x, double y)`
`IVec2` | `set(IDoubleI x, IDoubleI y)`
`IVec2` | `set(IVec2 v)`
`IVec2` | `set(IVec2I v)`
`IVec2` | `shear(double sxy, double syx)` shear operation on XY
`IVec2` | `shear(IDoubleI sxy, IDoubleI syx)` shear operation on XY
`IVec2` | `shear(IVec2I center, double sxy, double syx)` shear operation on XY
`IVec2` | `shear(IVec2I center, IDoubleI sxy, IDoubleI syx)` shear operation on XY
`IVec2` | `sub(double x, double y)`
`IVec2` | `sub(IDoubleI x, IDoubleI y)`
`IVec2` | `sub(IVec2 v)`
`IVec2` | `sub(IVec2I v)`
`IVec2` | `sum(double vx, double vy)` create a new instance of summation
`IVec2` | `sum(IVec2 v)` create a new instance of summation
`IVec2` | `sum(IVec2 v2, double w2)` create a new instance of weighted sum
`IVec2` | `sum(IVec2 v2, double w1, double w2)` create a new instance of weighted sum
`IVec2` | `sum(IVec2I... v)` create a new instance of summation
`IVec2` | `sum(IVec2I v)` create a new instance of summation
`IVec2` | `sum(IVec2I v2, double w2)` create a new instance of weighted sum
`IVec2` | `sum(IVec2I v2, double w1, double w2)` create a new instance of weighted sum
`IVec2` | `sum(IVec2I v2, IDoubleI w2)` create a new instance of weighted sum
`IVec2` | `sum(IVec2I v2, IDoubleI w1, IDoubleI w2)` create a new instance of weighted sum
`IVec` | `to3d()`
`IVec` | `to3d(double z)`
`IVec` | `to3d(IDoubleI z)`
`IVec4` | `to4d()`
`IVec4` | `to4d(double z, double w)`
`IVec4` | `to4d(IDoubleI z, IDoubleI w)`
`java.lang.String` | `toString()`
`IVec2` | `transform(IMatrix2I mat)` transform with 2x2 transform matrix
`IVec2` | `transform(IMatrix3I mat)` transform with 3x3 transform matrix
`IVec2` | `transform(IVec2I xvec, IVec2I yvec)` transform with transform vectors
`IVec2` | `transform(IVec2I xvec, IVec2I yvec, IVec2I translate)` transform with transform vectors
`IVec2` | `transform(IVec2 xvec, IVec2 yvec)` transform with transform vectors
`IVec2` | `transform(IVec2 xvec, IVec2 yvec, IVec2 translate)` transform with transform vectors
`IVec2` | `translate(double x, double y)` alias of add()
`IVec2` | `translate(IDoubleI x, IDoubleI y)` alias of add()
`IVec2` | `translate(IVec2 v)` alias of add()
`IVec2` | `translate(IVec2I v)` alias of add()
`IVec2` | `unit()` unitize (normalize) vector
`double` | `x()`
`IVec2` | `x(double vx)` setting x component
`IVec2` | `x(IDoubleI vx)` setting x component
`double` | `x(ISwitchE e)` getting x component
`IDouble` | `x(ISwitchR r)` getting x component
`double` | `y()`
`IVec2` | `y(double vy)` setting y component
`IVec2` | `y(IDoubleI vy)` setting y component
`double` | `y(ISwitchE e)` getting y component
`IDouble` | `y(ISwitchR r)` getting y component
`IVec2` | `zero()` setting all zero

Methods inherited from class igeo.IParameterObject
`createObject, parent, parent`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### x

    public double x

### y

    public double y

Constructor Detail

### IVec2

    public IVec2()

### IVec2

    public IVec2(double x,
                 double y)

### IVec2

    public IVec2(IVec2 v)

### IVec2

    public IVec2(IVec2I v)

### IVec2

    public IVec2(IDoubleI x,
                 IDoubleI y)

### IVec2

    public IVec2(IVecI v)

### IVec2

    public IVec2(IServerI s)

### IVec2

    public IVec2(IServerI s,
                 double x,
                 double y)

### IVec2

    public IVec2(IServerI s,
                 IVec2 v)

### IVec2

    public IVec2(IServerI s,
                 IVec2I v)

### IVec2

    public IVec2(IServerI s,
                 IDoubleI x,
                 IDoubleI y)

### IVec2

    public IVec2(IServerI s,
                 IVecI v)

Method Detail

### x

    public double x()

  Specified by:
    `x` in interface `IVec2I`

### y

    public double y()

  Specified by:
    `y` in interface `IVec2I`

### x

    public IVec2 x(double vx)

  setting x component

  Specified by:
    `x` in interface `IVec2I`

### y

    public IVec2 y(double vy)

  setting y component

  Specified by:
    `y` in interface `IVec2I`

### x

    public IVec2 x(IDoubleI vx)

  setting x component

  Specified by:
    `x` in interface `IVec2I`

### y

    public IVec2 y(IDoubleI vy)

  setting y component

  Specified by:
    `y` in interface `IVec2I`

### x

    public double x(ISwitchE e)

  getting x component

  Specified by:
    `x` in interface `IVec2I`

### y

    public double y(ISwitchE e)

  getting y component

  Specified by:
    `y` in interface `IVec2I`

### x

    public IDouble x(ISwitchR r)

  getting x component

  Specified by:
    `x` in interface `IVec2I`

### y

    public IDouble y(ISwitchR r)

  getting y component

  Specified by:
    `y` in interface `IVec2I`

### get

    public IVec2 get()

  Specified by:
    `get` in interface `IParameter`
  Specified by:
    `get` in interface `IVec2I`
  Specified by:
    `get` in interface `IVec2Op`

### dup

    public IVec2 dup()

  Specified by:
    `dup` in interface `IVec2I`

### to3d

    public IVec to3d()

  Specified by:
    `to3d` in interface `IVec2I`

### to3d

    public IVec to3d(double z)

  Specified by:
    `to3d` in interface `IVec2I`

### to3d

    public IVec to3d(IDoubleI z)

  Specified by:
    `to3d` in interface `IVec2I`

### to4d

    public IVec4 to4d()

  Specified by:
    `to4d` in interface `IVec2I`

### to4d

    public IVec4 to4d(double z,
                      double w)

  Specified by:
    `to4d` in interface `IVec2I`

### to4d

    public IVec4 to4d(IDoubleI z,
                      IDoubleI w)

  Specified by:
    `to4d` in interface `IVec2I`

### getX

    public IDouble getX()

  Specified by:
    `getX` in interface `IVec2I`

### getY

    public IDouble getY()

  Specified by:
    `getY` in interface `IVec2I`

### set

    public IVec2 set(double x,
                     double y)

  Specified by:
    `set` in interface `IVec2I`

### set

    public IVec2 set(IVec2 v)

### set

    public IVec2 set(IVec2I v)

  Specified by:
    `set` in interface `IVec2I`

### set

    public IVec2 set(IDoubleI x,
                     IDoubleI y)

  Specified by:
    `set` in interface `IVec2I`

### add

    public IVec2 add(double x,
                     double y)

  Specified by:
    `add` in interface `IVec2I`

### add

    public IVec2 add(IDoubleI x,
                     IDoubleI y)

  Specified by:
    `add` in interface `IVec2I`

### add

    public IVec2 add(IVec2 v)

### add

    public IVec2 add(IVec2I v)

  Specified by:
    `add` in interface `IVec2I`

### sub

    public IVec2 sub(double x,
                     double y)

  Specified by:
    `sub` in interface `IVec2I`

### sub

    public IVec2 sub(IDoubleI x,
                     IDoubleI y)

  Specified by:
    `sub` in interface `IVec2I`

### sub

    public IVec2 sub(IVec2 v)

### sub

    public IVec2 sub(IVec2I v)

  Specified by:
    `sub` in interface `IVec2I`

### mul

    public IVec2 mul(double x)

  Specified by:
    `mul` in interface `IVec2I`

### mul

    public IVec2 mul(IDouble v)

### mul

    public IVec2 mul(IDoubleI v)

  Specified by:
    `mul` in interface `IVec2I`

### div

    public IVec2 div(double x)

  Specified by:
    `div` in interface `IVec2I`

### div

    public IVec2 div(IDouble v)

### div

    public IVec2 div(IDoubleI v)

  Specified by:
    `div` in interface `IVec2I`

### neg

    public IVec2 neg()

  Specified by:
    `neg` in interface `IVec2I`

### rev

    public IVec2 rev()

  alias of neg

  Specified by:
    `rev` in interface `IVec2I`

### flip

    public IVec2 flip()

  alias of neg

  Specified by:
    `flip` in interface `IVec2I`

### zero

    public IVec2 zero()

  setting all zero

  Specified by:
    `zero` in interface `IVec2I`

### add

    public IVec2 add(IVec2 v,
                     double f)

  scale add

### add

    public IVec2 add(IVec2I v,
                     double f)

  scale add

  Specified by:
    `add` in interface `IVec2I`

### add

    public IVec2 add(IVec2I v,
                     IDoubleI f)

  scale add

  Specified by:
    `add` in interface `IVec2I`

### add

    public IVec2 add(double f,
                     IVec2 v)

  scale add; alias

### add

    public IVec2 add(double f,
                     IVec2I v)

  scale add; alias

  Specified by:
    `add` in interface `IVec2I`

### add

    public IVec2 add(IDoubleI f,
                     IVec2I v)

  scale add; alias

  Specified by:
    `add` in interface `IVec2I`

### dot

    public double dot(IVec2 v)

  dot product

### dot

    public double dot(double vx,
                      double vy)

  dot product

  Specified by:
    `dot` in interface `IVec2I`

### dot

    public double dot(IVec2I v)

  dot product

  Specified by:
    `dot` in interface `IVec2I`

### dot

    public double dot(ISwitchE e,
                      IVec2I v)

  dot product

  Specified by:
    `dot` in interface `IVec2I`

### dot

    public IDouble dot(ISwitchR r,
                       IVec2I v)

  dot product

  Specified by:
    `dot` in interface `IVec2I`

### cross

    public IVec cross(IVec2 v)

  cross product in z direction as IVec

### cross

    public IVec cross(double vx,
                      double vy)

  cross product in z direction as IVec

  Specified by:
    `cross` in interface `IVec2I`

### cross

    public IVec cross(IVec2I v)

  cross product in z direction as IVec

  Specified by:
    `cross` in interface `IVec2I`

### len

    public double len()

  Description copied from interface: `IVec2I`
  getting length

  Specified by:
    `len` in interface `IVec2I`
  Returns:
    length (norm) of the vector in double

### len

    public double len(ISwitchE e)

  Description copied from interface: `IVec2I`
  getting length

  Specified by:
    `len` in interface `IVec2I`
  Returns:
    length (norm) of the vector in double

### len

    public IDouble len(ISwitchR r)

  Description copied from interface: `IVec2I`
  getting length

  Specified by:
    `len` in interface `IVec2I`
  Returns:
    length (norm) of the vector in double

### len2

    public double len2()

  return squared length of the vector in double

  Specified by:
    `len2` in interface `IVec2I`

### len2

    public double len2(ISwitchE e)

  return squared length of the vector in double

  Specified by:
    `len2` in interface `IVec2I`

### len2

    public IDouble len2(ISwitchR r)

  return squared length of the vector in double

  Specified by:
    `len2` in interface `IVec2I`

### len

    public IVec2 len(IDoubleI l)

  setting length

  Specified by:
    `len` in interface `IVec2I`

### len

    public IVec2 len(double l)

  setting length

  Specified by:
    `len` in interface `IVec2I`

### unit

    public IVec2 unit()

  unitize (normalize) vector

  Specified by:
    `unit` in interface `IVec2I`

### ortho

    public IVec2 ortho()

  rotate vector in Pi/2

  Specified by:
    `ortho` in interface `IVec2I`

### dist

    public double dist(IVec2 v)

  distance of two vectors

### dist

    public double dist(double vx,
                       double vy)

  distance of two vectors

  Specified by:
    `dist` in interface `IVec2I`

### dist

    public double dist(IVec2I v)

  distance of two vectors

  Specified by:
    `dist` in interface `IVec2I`

### dist

    public double dist(ISwitchE e,
                       IVec2I v)

  distance of two vectors

  Specified by:
    `dist` in interface `IVec2I`

### dist

    public IDouble dist(ISwitchR r,
                        IVec2I v)

  distance of two vectors

  Specified by:
    `dist` in interface `IVec2I`

### dist2

    public double dist2(IVec2 v)

  squared distance of two vectors

### dist2

    public double dist2(double vx,
                        double vy)

  squared distance of two vectors

  Specified by:
    `dist2` in interface `IVec2I`

### dist2

    public double dist2(IVec2I v)

  squared distance of two vectors

  Specified by:
    `dist2` in interface `IVec2I`

### dist2

    public double dist2(ISwitchE e,
                        IVec2I v)

  squared distance of two vectors

  Specified by:
    `dist2` in interface `IVec2I`

### dist2

    public IDouble dist2(ISwitchR r,
                         IVec2I v)

  squared distance of two vectors

  Specified by:
    `dist2` in interface `IVec2I`

### eq

    public boolean eq(IVec2 v)

  whether location is same or not

### eq

    public boolean eq(double vx,
                      double vy)

  whether location is same or not

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public boolean eq(IVec2I v)

  whether location is same or not

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public boolean eq(ISwitchE e,
                      IVec2I v)

  whether location is same or not

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public IBool eq(ISwitchR r,
                    IVec2I v)

  whether location is same or not

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public boolean eq(IVec2 v,
                      double tolerance)

  whether location is same or not within tolerance

### eq

    public boolean eq(double vx,
                      double vy,
                      double tolerance)

  whether location is same or not within tolerance

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public boolean eq(IVec2I v,
                      double tolerance)

  whether location is same or not within tolerance

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public boolean eq(ISwitchE e,
                      IVec2I v,
                      double tolerance)

  whether location is same or not within tolerance

  Specified by:
    `eq` in interface `IVec2I`

### eq

    public IBool eq(ISwitchR r,
                    IVec2I v,
                    IDoubleI tolerance)

  whether location is same or not within tolerance

  Specified by:
    `eq` in interface `IVec2I`

### eqX

    public boolean eqX(IVec2 v)

  check if same in X

### eqY

    public boolean eqY(IVec2 v)

  check if same in Y

### eqX

    public boolean eqX(double vx)

  check if same in X

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(double vy)

  check if same in Y

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public boolean eqX(IVec2I v)

  check if same in X

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(IVec2I v)

  check if same in Y

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public boolean eqX(ISwitchE e,
                       IVec2I v)

  check if same in X

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(ISwitchE e,
                       IVec2I v)

  check if same in Y

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public IBool eqX(ISwitchR r,
                     IVec2I v)

  check if same in X

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public IBool eqY(ISwitchR r,
                     IVec2I v)

  check if same in Y

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public boolean eqX(IVec2 v,
                       double tolerance)

  check if same in X within tolerance

### eqY

    public boolean eqY(IVec2 v,
                       double tolerance)

  check if same in Y within tolerance

### eqX

    public boolean eqX(double vx,
                       double tolerance)

  check if same in X within tolerance

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(double vy,
                       double tolerance)

  check if same in Y within tolerance

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public boolean eqX(IVec2I v,
                       double tolerance)

  check if same in X within tolerance

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(IVec2I v,
                       double tolerance)

  check if same in Y within tolerance

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public boolean eqX(ISwitchE e,
                       IVec2I v,
                       double tolerance)

  check if same in X within tolerance

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public boolean eqY(ISwitchE e,
                       IVec2I v,
                       double tolerance)

  check if same in Y within tolerance

  Specified by:
    `eqY` in interface `IVec2I`

### eqX

    public IBool eqX(ISwitchR r,
                     IVec2I v,
                     IDoubleI tolerance)

  check if same in X within tolerance

  Specified by:
    `eqX` in interface `IVec2I`

### eqY

    public IBool eqY(ISwitchR r,
                     IVec2I v,
                     IDoubleI tolerance)

  check if same in Y within tolerance

  Specified by:
    `eqY` in interface `IVec2I`

### angle

    public double angle(IVec2 v)

  Returns:
    angle of two vector. From -Pi to Pi. Sign follows right-handed screw rule

### angle

    public double angle(double vx,
                        double vy)

  Description copied from interface: `IVec2I`
  angle between two vectors

  Specified by:
    `angle` in interface `IVec2I`
  Returns:
    angle of two vector. From -Pi to Pi. Sign follows right-handed screw rule

### angle

    public double angle(IVec2I v)

  Description copied from interface: `IVec2I`
  angle between two vectors

  Specified by:
    `angle` in interface `IVec2I`
  Returns:
    angle of two vector. From -Pi to Pi. Sign follows right-handed screw rule

### angle

    public double angle(ISwitchE e,
                        IVec2I v)

  Description copied from interface: `IVec2I`
  angle between two vectors

  Specified by:
    `angle` in interface `IVec2I`
  Returns:
    angle of two vector. From -Pi to Pi. Sign follows right-handed screw rule

### angle

    public IDouble angle(ISwitchR r,
                         IVec2I v)

  Description copied from interface: `IVec2I`
  angle between two vectors

  Specified by:
    `angle` in interface `IVec2I`
  Returns:
    angle of two vector. From -Pi to Pi. Sign follows right-handed screw rule

### rot

    public IVec2 rot(double angle)

  rotate

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IDoubleI angle)

  rotate

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IVec2 center,
                     double angle)

  rotate around center

### rot

    public IVec2 rot(double centerX,
                     double centerY,
                     double angle)

  rotate around center

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IVec2I center,
                     double angle)

  rotate around center

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IVec2I center,
                     IDoubleI angle)

  rotate around center

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IVec2 destDir)

  rotate towards destination direction

### rot

    public IVec2 rot(IVec2I destDir)

  rotate towards destination direction

  Specified by:
    `rot` in interface `IVec2I`

### rot

    public IVec2 rot(IVec2 center,
                     IVec2 destPt)

  rotate around center towards destination point

### rot

    public IVec2 rot(IVec2I center,
                     IVec2I destPt)

  rotate around center towards destination point

  Specified by:
    `rot` in interface `IVec2I`

### scale

    public IVec2 scale(double f)

  alias of mul

  Specified by:
    `scale` in interface `IVec2I`

### scale

    public IVec2 scale(IDoubleI f)

  alias of mul

  Specified by:
    `scale` in interface `IVec2I`

### scale

    public IVec2 scale(IVec2 center,
                       double f)

  scale around center

### scale

    public IVec2 scale(double centerX,
                       double centerY,
                       double f)

  scale around center

  Specified by:
    `scale` in interface `IVec2I`

### scale

    public IVec2 scale(IVec2I center,
                       double f)

  scale around center

  Specified by:
    `scale` in interface `IVec2I`

### scale

    public IVec2 scale(IVec2I center,
                       IDoubleI f)

  scale around center

  Specified by:
    `scale` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(IVec2 axis,
                         double f)

  scale only in 1 direction

### scale1d

    public IVec2 scale1d(IVec2I axis,
                         double f)

  scale only in 1 direction

  Specified by:
    `scale1d` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(IVec2I axis,
                         IDoubleI f)

  scale only in 1 direction

  Specified by:
    `scale1d` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(double axisX,
                         double axisY,
                         double f)

  scale only in 1 direction

  Specified by:
    `scale1d` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(IVec2 center,
                         IVec2 axis,
                         double f)

  scale only in 1 direction from a center

### scale1d

    public IVec2 scale1d(IVec2I center,
                         IVec2I axis,
                         double f)

  scale only in 1 direction from a center

  Specified by:
    `scale1d` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(IVec2I center,
                         IVec2I axis,
                         IDoubleI f)

  scale only in 1 direction from a center

  Specified by:
    `scale1d` in interface `IVec2I`

### scale1d

    public IVec2 scale1d(double centerX,
                         double centerY,
                         double axisX,
                         double axisY,
                         double f)

  scale only in 1 direction from a center

  Specified by:
    `scale1d` in interface `IVec2I`

### ref

    public IVec2 ref(IVec2 lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Parameters:
    `lineDir` - direction of reflection line

### ref

    public IVec2 ref(double lineX,
                     double lineY)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `ref` in interface `IVec2I`

### ref

    public IVec2 ref(IVec2I lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `ref` in interface `IVec2I`
  Parameters:
    `lineDir` - direction of reflection line

### ref

    public IVec2 ref(IVec2 linePt,
                     IVec2 lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Parameters:
    `linePt` - start point of reflection line
    `lineDir` - direction of reflection line

### ref

    public IVec2 ref(double linePtX,
                     double linePtY,
                     double lineDirX,
                     double lineDirY)

  reflect (mirror) 2 dimensionally to the other side of the line at line point

  Specified by:
    `ref` in interface `IVec2I`

### ref

    public IVec2 ref(IVec2I linePt,
                     IVec2I lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `ref` in interface `IVec2I`
  Parameters:
    `linePt` - start point of reflection line
    `lineDir` - direction of reflection line

### mirror

    public IVec2 mirror(IVec2 lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Parameters:
    `lineDir` - direction of reflection line

### mirror

    public IVec2 mirror(double lineX,
                        double lineY)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `mirror` in interface `IVec2I`

### mirror

    public IVec2 mirror(IVec2I lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `mirror` in interface `IVec2I`
  Parameters:
    `lineDir` - direction of reflection line

### mirror

    public IVec2 mirror(IVec2 linePt,
                        IVec2 lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Parameters:
    `linePt` - start point of reflection line
    `lineDir` - direction of reflection line

### mirror

    public IVec2 mirror(double linePtX,
                        double linePtY,
                        double lineDirX,
                        double lineDirY)

  reflect (mirror) 2 dimensionally to the other side of the line at line point

  Specified by:
    `mirror` in interface `IVec2I`

### mirror

    public IVec2 mirror(IVec2I linePt,
                        IVec2I lineDir)

  reflect (mirror) 2 dimensionally to the other side of the line

  Specified by:
    `mirror` in interface `IVec2I`
  Parameters:
    `linePt` - start point of reflection line
    `lineDir` - direction of reflection line

### shear

    public IVec2 shear(double sxy,
                       double syx)

  shear operation on XY

  Specified by:
    `shear` in interface `IVec2I`

### shear

    public IVec2 shear(IDoubleI sxy,
                       IDoubleI syx)

  shear operation on XY

  Specified by:
    `shear` in interface `IVec2I`

### shear

    public IVec2 shear(IVec2I center,
                       double sxy,
                       double syx)

  shear operation on XY

  Specified by:
    `shear` in interface `IVec2I`

### shear

    public IVec2 shear(IVec2I center,
                       IDoubleI sxy,
                       IDoubleI syx)

  shear operation on XY

  Specified by:
    `shear` in interface `IVec2I`

### translate

    public IVec2 translate(double x,
                           double y)

  alias of add()

  Specified by:
    `translate` in interface `IVec2I`

### translate

    public IVec2 translate(IDoubleI x,
                           IDoubleI y)

  alias of add()

  Specified by:
    `translate` in interface `IVec2I`

### translate

    public IVec2 translate(IVec2 v)

  alias of add()

### translate

    public IVec2 translate(IVec2I v)

  alias of add()

  Specified by:
    `translate` in interface `IVec2I`

### transform

    public IVec2 transform(IMatrix2I mat)

  transform with 2x2 transform matrix

  Specified by:
    `transform` in interface `IVec2I`

### transform

    public IVec2 transform(IMatrix3I mat)

  transform with 3x3 transform matrix

  Specified by:
    `transform` in interface `IVec2I`

### transform

    public IVec2 transform(IVec2 xvec,
                           IVec2 yvec)

  transform with transform vectors

### transform

    public IVec2 transform(IVec2I xvec,
                           IVec2I yvec)

  transform with transform vectors

  Specified by:
    `transform` in interface `IVec2I`

### transform

    public IVec2 transform(IVec2 xvec,
                           IVec2 yvec,
                           IVec2 translate)

  transform with transform vectors

### transform

    public IVec2 transform(IVec2I xvec,
                           IVec2I yvec,
                           IVec2I translate)

  transform with transform vectors

  Specified by:
    `transform` in interface `IVec2I`

### mv

    public IVec2 mv(double x,
                    double y)

  mv() is alias of add()

  Specified by:
    `mv` in interface `IVec2I`

### mv

    public IVec2 mv(IDoubleI x,
                    IDoubleI y)

  mv() is alias of add()

  Specified by:
    `mv` in interface `IVec2I`

### mv

    public IVec2 mv(IVec2 v)

  mv() is alias of add()

### mv

    public IVec2 mv(IVec2I v)

  mv() is alias of add()

  Specified by:
    `mv` in interface `IVec2I`

### cp

    public IVec2 cp()

  cp() is alias of dup()

  Specified by:
    `cp` in interface `IVec2I`

### cp

    public IVec2 cp(double x,
                    double y)

  cp() is alias of dup().add()

  Specified by:
    `cp` in interface `IVec2I`

### cp

    public IVec2 cp(IDoubleI x,
                    IDoubleI y)

  cp() is alias of dup().add()

  Specified by:
    `cp` in interface `IVec2I`

### cp

    public IVec2 cp(IVec2 v)

  cp() is alias of dup().add()

### cp

    public IVec2 cp(IVec2I v)

  cp() is alias of dup().add()

  Specified by:
    `cp` in interface `IVec2I`

### dif

    public IVec2 dif(IVec2 v)

  create a new instance of difference

### dif

    public IVec2 dif(double vx,
                     double vy)

  create a new instance of difference

  Specified by:
    `dif` in interface `IVec2I`

### dif

    public IVec2 dif(IVec2I v)

  create a new instance of difference

  Specified by:
    `dif` in interface `IVec2I`

### diff

    public IVec2 diff(IVec2 v)

  alias of dif

### diff

    public IVec2 diff(double vx,
                      double vy)

  alias of dif

  Specified by:
    `diff` in interface `IVec2I`

### diff

    public IVec2 diff(IVec2I v)

  alias of dif

  Specified by:
    `diff` in interface `IVec2I`

### mid

    public IVec2 mid(IVec2 v)

  create a new instance of midpoint

### mid

    public IVec2 mid(double vx,
                     double vy)

  create a new instance of midpoint

  Specified by:
    `mid` in interface `IVec2I`

### mid

    public IVec2 mid(IVec2I v)

  create a new instance of midpoint

  Specified by:
    `mid` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2 v)

  create a new instance of summation

### sum

    public IVec2 sum(double vx,
                     double vy)

  create a new instance of summation

  Specified by:
    `sum` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2I v)

  create a new instance of summation

  Specified by:
    `sum` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2I... v)

  create a new instance of summation

  Specified by:
    `sum` in interface `IVec2I`

### bisect

    public IVec2 bisect(IVec2 v)

  create a new instance of bisector

### bisect

    public IVec2 bisect(double vx,
                        double vy)

  create a new instance of bisector

  Specified by:
    `bisect` in interface `IVec2I`

### bisect

    public IVec2 bisect(IVec2I v)

  create a new instance of bisector

  Specified by:
    `bisect` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2 v2,
                     double w1,
                     double w2)

  create a new instance of weighted sum

### sum

    public IVec2 sum(IVec2I v2,
                     double w1,
                     double w2)

  create a new instance of weighted sum

  Specified by:
    `sum` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2I v2,
                     IDoubleI w1,
                     IDoubleI w2)

  create a new instance of weighted sum

  Specified by:
    `sum` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2 v2,
                     double w2)

  create a new instance of weighted sum

### sum

    public IVec2 sum(IVec2I v2,
                     double w2)

  create a new instance of weighted sum

  Specified by:
    `sum` in interface `IVec2I`

### sum

    public IVec2 sum(IVec2I v2,
                     IDoubleI w2)

  create a new instance of weighted sum

  Specified by:
    `sum` in interface `IVec2I`

### nml

    public IVec nml(IVec2 v)

  alias of cross

### nml

    public IVec nml(IVec2I v)

  alias of cross

  Specified by:
    `nml` in interface `IVec2I`

### nml

    public IVecI nml(double vx,
                     double vy)

  alias of cross

  Specified by:
    `nml` in interface `IVec2I`

### nml

    public IVecI nml(IVec2 pt1,
                     IVec2 pt2)

  create normal vector from 3 points of self, pt1 and pt2

### nml

    public IVecI nml(double vx1,
                     double vy1,
                     double vx2,
                     double vy2)

  create normal vector from 3 points of self, pt1 and pt2

  Specified by:
    `nml` in interface `IVec2I`

### nml

    public IVecI nml(IVec2I pt1,
                     IVec2I pt2)

  create normal vector from 3 points of self, pt1 and pt2

  Specified by:
    `nml` in interface `IVec2I`

### isParallel

    public boolean isParallel(IVec2I v)

  check if two vectors are parallel

### isParallel

    public boolean isParallel(IVec2I v,
                              double angleReso)

  check if two vectors are parallel

### isStraight

    public boolean isStraight(IVec2I v1,
                              IVec2I v2)

  check if three locations are on straight line

### isStraight

    public boolean isStraight(IVec2I v1,
                              IVec2I v2,
                              double angleReso)

  check if three locations are on straight line

### intersect

    public static IVec2 intersect(IVec2I pt1,
                                  IVec2I dir1,
                                  IVec2I pt2,
                                  IVec2I dir2)

  intersection of two infinite lines

### intersectYLine

    public static IVec2 intersectYLine(IVec2 linePt,
                                       IVec2 lineDir,
                                       double xOfYLine)

### intersectXLine

    public static IVec2 intersectXLine(IVec2 linePt,
                                       IVec2 lineDir,
                                       double yOfXLine)

### intersectSegment

    public static IVec2 intersectSegment(IVec2I line1pt1,
                                         IVec2I line1pt2,
                                         IVec2I line2pt1,
                                         IVec2I line2pt2)

### intersectPolyline

    public static IVec2 intersectPolyline(IVec2I p1,
                                          IVec2I p2,
                                          IVec2I[] pts,
                                          boolean closed)

### intersectPolyline

    public static IVec2 intersectPolyline(IVec2I p1,
                                          IVec2I p2,
                                          IVec2I[] pts)

### intersectPolygon

    public static IVec2 intersectPolygon(IVec2I p1,
                                         IVec2I p2,
                                         IVec2I[] pts)

### intersectSegmentAndXLine

    public static IVec2 intersectSegmentAndXLine(IVec2I linePt1,
                                                 IVec2I linePt2,
                                                 double y)

### intersectSegmentAndYLine

    public static IVec2 intersectSegmentAndYLine(IVec2I linePt1,
                                                 IVec2I linePt2,
                                                 double x)

### removeStraightPoints

    public static IVec2I[] removeStraightPoints(IVec2I[] pts,
                                                boolean closed)

  remove points which are on straight line of adjacents

### removeDuplicatedPoints

    public static IVec2I[] removeDuplicatedPoints(IVec2I[] pts,
                                                  boolean closed)

### isInside

    public boolean isInside(IVec2I[] pts)

  determine if the point is insde the polygon defined by the argument

### isInside

    public boolean isInside(IVec2[] pts)

  determine if the point is insde the polygon defined by the argument true if the point is on the edge of polygon

### isValid

    public boolean isValid()

  checking x, y is valid number (not Infinite, nor NaN).

  Specified by:
    `isValid` in interface `IVec2I`

### toString

    public java.lang.String toString()

  Overrides:
    `toString` in class `java.lang.Object`

### distToLine

    public double distToLine(IVec2 pt1,
                             IVec2 pt2)

### isOnLine

    public boolean isOnLine(IVec2 pt1,
                            IVec2 pt2)

### isBetween

    public boolean isBetween(IVec2I pt1,
                             IVec2I pt2)

### projectTo2Vec

    public double[] projectTo2Vec(IVec2I v1,
                                  IVec2I v2)

  project the vector to the plane defined by two input vector and decompose vector to two vector and another perpendicular vector and returns coefficient of them. relationship of them is like below. this = return[0] * v1 + return[1] * v2 ;

  Returns:
    array of three double number, first is coefficient of uvec, second is of vvec

### perpendicularVecToLine

    public IVec2 perpendicularVecToLine(IVec2I lineDir,
                                        IVec2I linePt)

  create a new vector from this point to the line in parpendicular direction.

### perpendicularVecToLine

    public IVec2 perpendicularVecToLine(IVec2I lineDir)

  create a new vector from line to this point perpendicular to the line dir

### distToLine

    public double distToLine(IVec2I lineDir,
                             IVec2I linePt)

  distance to an infinite line

### distToLine

    public double distToLine(IVec2I lineDir)

  distance to a line dir

### distToSegment

    public double distToSegment(IVec2I linePt1,
                                IVec2I linePt2)

  distance to a line segment

### ratioOnSegment

    public double ratioOnSegment(IVec2I linePt1,
                                 IVec2I linePt2)

  ratio of projected point between two points (line segment). 0.0 is at linePt1, 1.0 is at linePt2.

### distToTriangle

    public double distToTriangle(IVec2I pt1,
                                 IVec2I pt2,
                                 IVec2I pt3)

  distance to a triangle

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