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## igeo
Class ICircleGeo

    java.lang.Object
      igeo.IParameterObject
          igeo.INurbsGeo
              igeo.ICurveGeo
                  igeo.ICircleGeo

All Implemented Interfaces:
  ICurveI, ICurveOp, IEntityParameter, IParameter, ISubobject, ITransformable, IVal

    public class ICircleGeo

extends ICurveGeo

Geometry class of a circle. Implemented as a type of NURBS curve.

Author:
  Satoru Sugihara

Field Summary
`IVecI` | `center`
`IVecI` | `normal`
`IDoubleI` | `xradius`
`IDoubleI` | `yradius`

Fields inherited from class igeo.ICurveGeo
`basisFunction, controlPoints, defaultWeights, degree, derivativeFunction, knots, uend, uSearchCache, ustart`

Fields inherited from class igeo.IParameterObject
`parent`

Constructor Summary
`ICircleGeo(IVecI center, IVecI normal, double radius)`
`ICircleGeo(IVecI center, IVecI normal, double radius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, double xradius, double yradius)`
`ICircleGeo(IVecI center, IVecI normal, double xradius, double yradius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IDoubleI radius)`
`ICircleGeo(IVecI center, IVecI normal, IDoubleI radius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IDoubleI xradius, IDoubleI yradius)`
`ICircleGeo(IVecI center, IVecI normal, IDoubleI xradius, IDoubleI yradius, boolean approx)`
`ICircleGeo(IVecI center, IVecI xradiusVec, IVecI yradiusVec)`
`ICircleGeo(IVecI center, IVecI xradiusVec, IVecI yradiusVec, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, double radius)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, double radius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, double xradius, double yradius)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, double xradius, double yradius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, IDoubleI radius)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, IDoubleI radius, boolean approx)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, IDoubleI xradius, IDoubleI yradius)`
`ICircleGeo(IVecI center, IVecI normal, IVecI rollDir, IDoubleI xradius, IDoubleI yradius, boolean approx)`

Method Summary
`IVec` | `center()` Returns center of geometry object.
`ICircleGeo` | `center(IVecI c)`
`static IVec4[]` | `circleCP(IVec center, double radius)`
`static IVec4[]` | `circleCP(IVec center, IVec normal, double radius)`
`static IVec4[]` | `circleCP(IVec center, IVec normal, IVec rollDir, double radius)`
`static IVec4[]` | `circleCP(IVec center, IVec normal, IVec rollDir, double xradius, double yradius)`
`static IVec[]` | `circleCPApprox(IVec center, IVec normal, IVec rollDir, double xradius, double yradius)` for some platform where regular circle cp with duplicates cannot be shown properly.
`static int` | `circleDeg()`
`static double[]` | `circleKnots()`
`static ICircleGeo` | `circumcircle(IVecI pt1, IVecI pt2, IVecI pt3)`
`ICircleGeo` | `cps(IVecI[] cps)`
`void` | `init()`
`void` | `initApprox()`
`IVec` | `nml()`
`ICircleGeo` | `nml(IVec n)`
`static IVec4[]` | `ovalCP(IVec center, IVec xaxis, IVec yaxis)`
`static IVec[]` | `ovalCPApprox(IVec center, IVec xaxis, IVec yaxis)`
`double` | `radius()`
`ICircleGeo` | `radius(double r)`
`ICircleGeo` | `radius(IDoubleI r)`
`ICircleGeo` | `update(IVecI center, IVecI normal, IDoubleI xradius, IDoubleI yradius, boolean approx)`
`ICircleGeo` | `update(IVecI center, IVecI xradiusVec, IVecI yradiusVec, boolean approx)`
`ICircleGeo` | `update(IVecI center, IVecI normal, IVecI rollDir, IDoubleI xradius, IDoubleI yradius, boolean approx)`
`double` | `xradius()`
`ICircleGeo` | `xradius(double r)`
`ICircleGeo` | `xradius(IDoubleI r)`
`double` | `yradius()`
`ICircleGeo` | `yradius(double r)`
`ICircleGeo` | `yradius(IDoubleI r)`

Methods inherited from class igeo.ICurveGeo
`add, add, add, add, add, add, add, addCP, addCP, addCP, addCP, addCP, addCP, addCP, addCP, checkDuplicatedCP, checkDuplicatedCP, checkDuplicatedCP, checkDuplicatedCPOnEdge, closePt, closePt, cp, cp, cp, cp, cp, cp, cpNum, cpNum, cpNum, cps, deg, deg, deg, dist, dist, div, div, dup, end, endCP, ep, ep, epNum, epNum, epNum, flip, flipU, get, getPointsFromArray, init, init, init, init, init, insertCP, insertCP, isClosed, isClosed, isClosed, isInside2d, isInside2d, isRational, isRational, isRational, isValid, isValidCP, isValidCP, knot, knot, knotNum, knotNum, knotNum, knots, knots, knots, len, len, len, len, mid, mirror, mirror, mul, mul, mv, mv, mv, neg, num, num, num, overlapCPNum, pt, pt, pt, ref, ref, removeCP, removeCP, removeCP, rev, revU, rot, rot, rot, rot, rot, rot, rot, rot, rot2, rot2, rot2, rot2, rot2, rot2, scale, scale, scale, scale, scale1d, scale1d, scale1d, scale1d, shear, shear, shear, shear, shearXY, shearXY, shearXY, shearXY, shearYZ, shearYZ, shearYZ, shearYZ, shearZX, shearZX, shearZX, shearZX, start, startCP, sub, sub, sub, tan, tan, tan, transform, transform, transform, transform, translate, translate, translate, u, u, u, u, u, u, u, u, uend, uend, uend, updateCache, ustart, ustart, ustart`

Methods inherited from class igeo.INurbsGeo
`createClosedCP, createClosedCPInU, createClosedCPInV, createClosedKnots, createKnots, createKnots, invertKnots, isValidKnots, normalizeKnots`

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

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

Field Detail

### center

    public IVecI center

### normal

    public IVecI normal

### xradius

    public IDoubleI xradius

### yradius

    public IDoubleI yradius

Constructor Detail

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IDoubleI radius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      double radius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IDoubleI xradius,
                      IDoubleI yradius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      double xradius,
                      double yradius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      double radius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      IDoubleI radius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      double xradius,
                      double yradius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      IDoubleI xradius,
                      IDoubleI yradius)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI xradiusVec,
                      IVecI yradiusVec)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IDoubleI radius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      double radius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      double xradius,
                      double yradius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IDoubleI xradius,
                      IDoubleI yradius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      double radius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      IDoubleI radius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      double xradius,
                      double yradius,
                      boolean approx)

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI normal,
                      IVecI rollDir,
                      IDoubleI xradius,
                      IDoubleI yradius,
                      boolean approx)

Parameters:
  `rollDir` - direction of start point

### ICircleGeo

    public ICircleGeo(IVecI center,
                      IVecI xradiusVec,
                      IVecI yradiusVec,
                      boolean approx)

Method Detail

### circleDeg

    public static int circleDeg()

### circleKnots

    public static double[] circleKnots()

### circleCP

    public static IVec4[] circleCP(IVec center,
                                   double radius)

### circleCP

    public static IVec4[] circleCP(IVec center,
                                   IVec normal,
                                   double radius)

### circleCP

    public static IVec4[] circleCP(IVec center,
                                   IVec normal,
                                   IVec rollDir,
                                   double radius)

### circleCP

    public static IVec4[] circleCP(IVec center,
                                   IVec normal,
                                   IVec rollDir,
                                   double xradius,
                                   double yradius)

### ovalCP

    public static IVec4[] ovalCP(IVec center,
                                 IVec xaxis,
                                 IVec yaxis)

### circleCPApprox

    public static IVec[] circleCPApprox(IVec center,
                                        IVec normal,
                                        IVec rollDir,
                                        double xradius,
                                        double yradius)

  for some platform where regular circle cp with duplicates cannot be shown properly. (ex. AI) knots for these control points can be uniform.

### ovalCPApprox

    public static IVec[] ovalCPApprox(IVec center,
                                      IVec xaxis,
                                      IVec yaxis)

### circumcircle

    public static ICircleGeo circumcircle(IVecI pt1,
                                          IVecI pt2,
                                          IVecI pt3)

### init

    public void init()

### initApprox

    public void initApprox()

### update

    public ICircleGeo update(IVecI center,
                             IVecI normal,
                             IDoubleI xradius,
                             IDoubleI yradius,
                             boolean approx)

### update

    public ICircleGeo update(IVecI center,
                             IVecI normal,
                             IVecI rollDir,
                             IDoubleI xradius,
                             IDoubleI yradius,
                             boolean approx)

### update

    public ICircleGeo update(IVecI center,
                             IVecI xradiusVec,
                             IVecI yradiusVec,
                             boolean approx)

### cps

    public ICircleGeo cps(IVecI[] cps)

### center

    public IVec center()

  Description copied from class: `ICurveGeo`
  Returns center of geometry object. This is approximation calculated only by control points

  Specified by:
    `center` in interface `ICurveI`
  Overrides:
    `center` in class `ICurveGeo`

### center

    public ICircleGeo center(IVecI c)

### nml

    public IVec nml()

### nml

    public ICircleGeo nml(IVec n)

### radius

    public double radius()

### radius

    public ICircleGeo radius(double r)

### radius

    public ICircleGeo radius(IDoubleI r)

### xradius

    public double xradius()

### xradius

    public ICircleGeo xradius(double r)

### xradius

    public ICircleGeo xradius(IDoubleI r)

### yradius

    public double yradius()

### yradius

    public ICircleGeo yradius(double r)

### yradius

    public ICircleGeo yradius(IDoubleI r)

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