vgp.curve.zigzag

## Class PjZigZag

- java.lang.Object
- - jv.object.PsObject
  - - jv.project.PjProject
    - - vgp.curve.zigzag.PjZigZag

- All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, PsTimeListenerIf, PsUpdateIf, PvPickListenerIf

      public class PjZigZag
      extends PjProject

  Computes a Zigzag construction as described by Peter Giblin. P. Giblin, Zigzags, http://www.liv.ac.uk/~pjgiblin/papers/zigzag-final.pdf
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class jv.object.PsObject

      `HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PjZigZag()` Sets the required polygon and the panels for the number of lines, Length of the Zag and the angles of the zig and the zag.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `PdVector[]` | `computeVertices(PgPolygonSet z_short, double[] vFac, int[] length)` Computes the vertices of the ZigZag with the given parameters.
    `void` | `computeZigZag()` Computes the ZigZag construction depending on the given prameters: angles, lengths and number of lines.
    `void` | `init()` Initializes the Applet.
    `PiVector[]` | `showZags(PgPolygonSet z_short, int delta)` Draws the Zags extended to infinity.
    `PiVector[]` | `showZigZag(PgPolygonSet z_short)` Draws the ZigZag in original size.
    `void` | `start()` Starts the Applet
    `boolean` | `update(java.lang.Object event)` Handles the events of the Panel

    - ### Methods inherited from class jv.project.PjProject

      `addDisplay, addGeometry, addGeometry, dispose, dragDisplay, dragInitial, dragVertex, fitDisplays, getAnimation, getDisplay, getDisplays, getGeometry, getGeometry, getNumGeometries, getParameter, getViewer, hasAnimation, hasDisplay, isEnabledAutoFit, markVertices, pickDisplay, pickInitial, pickVertex, removeDisplay, removeGeometries, removeGeometry, selectDisplay, selectGeometry, setAnimation, setBackColor, setBorderType, setDisplay, setEnabledAutoFit, setGeometry, setParameter, setTime, setViewer, stop, unmarkVertices`

    - ### Methods inherited from class jv.object.PsObject

      `addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, toString, updatePanels`

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface jv.anim.PsTimeListenerIf

      `getName`

    - ### Methods inherited from interface jv.project.PvPickListenerIf

      `getName`

- - ### Constructor Detail

    - #### PjZigZag

          public PjZigZag()

      Sets the required polygon and the panels for the number of lines, Length of the Zag and the angles of the zig and the zag.

  - ### Method Detail

    - #### init

          public void init()

      Initializes the Applet. Sets default values and draws the standard zigzag.
      Overrides:
        `init` in class `PjProject`

    - #### start

          public void start()

      Starts the Applet
      Overrides:
        `start` in class `PjProject`
      See Also:
        `PvViewerIf.start()`, `PjProject.isEnabledAutoFit()`

    - #### update

          public boolean update(java.lang.Object event)

      Handles the events of the Panel
      Specified by:
        `update` in interface `PsUpdateIf`
      Overrides:
        `update` in class `PsObject`
      Parameters:
        `event` - carries a lot of information
      Returns:
        true if event has been handled, otherwise false
      See Also:
        `PsObject.setParent(PsUpdateIf)`, `PsObject.getFather()`, `PsObject.addUpdateListener(PsUpdateIf)`

    - #### computeZigZag

          public void computeZigZag()

      Computes the ZigZag construction depending on the given prameters: angles, lengths and number of lines. The length of the zig is held constantly at 100.

    - #### computeVertices

          public PdVector[] computeVertices(PgPolygonSet z_short,
                                   double[] vFac,
                                   int[] length)

      Computes the vertices of the ZigZag with the given parameters.
      Parameters:
        `z_short` - polygons that define the number of polygons in the zigzag
        `vFac` - vFac[0] = angle of zig, vFac[1] = angle of zag
        `length` - m_length[0] = length of zig, m_length[1] = length of zag
      Returns:
        the vertices of the zigzag construction

    - #### showZags

          public PiVector[] showZags(PgPolygonSet z_short,
                            int delta)

      Draws the Zags extended to infinity.
      Parameters:
        `z_short` - the polygons drawn in this method are baed on the points in this polygonset
        `delta` - the number of zags skipped
      Returns:
        the polygons of which each contains an extended zag (2 verices). The number of polygons is defined by the number of polygons in z_short.

    - #### showZigZag

          public PiVector[] showZigZag(PgPolygonSet z_short)

      Draws the ZigZag in original size.
      Parameters:
        `z_short` - the polygons drawn in this method are baed on the points in this polygonset
      Returns:
        the polygons of which each contains a zig and a zag (3 vertices). The number of polygons is defined by the number of polygons in z_short.

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