jvx.geom

## Class PwTexture

- java.lang.Object
- - jv.object.PsObject
  - - jvx.project.PjWorkshop
    - - jvx.geom.PwTexture

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

      public class PwTexture
      extends PjWorkshop

  Utility class for generation of surface textures.
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static java.lang.String` | `m_defDijkstraTexture` Default texture for triangular elements.
    `static java.lang.String` | `m_defQuadTexture` Default texture for quadrilateral and higher elements.
    `static java.lang.String` | `m_defTriTexture` Default texture for triangular elements.

    - ### 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`

    - ### Fields inherited from interface jv.project.PjWorkshopIf

      `MODE_BUG, MODE_STANDARD, MODE_VALIDATE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PwTexture()` Constructor.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `burn()` Burns surface colors to a new texture image using element textures.
    `static void` | `compactPeriodicTextures(PdVector[][] texture)` Translate texture coordinates of each element by an integer vector, such that the texture coordinates are close to 0.
    `int` | `getLicSize()` Get length of the longest edge of triangles in texture domain.
    `void` | `init()` Resets all properties to default values.
    `static void` | `makeDijkstraTexture(PgElementSet geom)` Generate element texture showing lines through all mid points of edges with different Dijkstra values at their ends.
    `static double[]` | `makeElementTextureCoords(PgElementSet geom, int maxwidth)` Calculates element texture coordinates for triangulation.
    `static void` | `makePatchTexture(PgElementSet geom)` Assign same texture image to each element of a geometry.
    `static void` | `makeThresholdTexture(PgElementSet geom, PdVector[] value, double[] threshold)` Generate element texture by two sets of scalar data per vertex and two thresholds.
    `static void` | `makeThresholdTexture(PgElementSet geom, PdVector value, double threshold)` Generate element texture by scalar data per vertex and a threshold value.
    `void` | `setGeometry(PgElementSet geom)` Assign an element set which must be a triangulation.
    `void` | `setLicSize(int size)` Set length of the longest edge of triangles in texture domain.
    `boolean` | `update(java.lang.Object event)` Update the class whenever a child has changed.

    - ### Methods inherited from class jvx.project.PjWorkshop

      `cancel, close, getDisplay, getDisplays, getGeometry, getMode, getSavedGeometry, getViewer, isModal, isStandalone, ok, removeGeometry, reset, setDisplay, setDisplays, setGeometry, setModal, setMode, setStandalone, setViewer`

    - ### 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.object.PsUpdateIf

      `getFather, getName, setParent`

- - ### Field Detail

    - #### m_defQuadTexture

          public static java.lang.String m_defQuadTexture

      Default texture for quadrilateral and higher elements.

    - #### m_defTriTexture

          public static java.lang.String m_defTriTexture

      Default texture for triangular elements.

    - #### m_defDijkstraTexture

          public static java.lang.String m_defDijkstraTexture

      Default texture for triangular elements.

  - ### Constructor Detail

    - #### PwTexture

          public PwTexture()

      Constructor.

  - ### Method Detail

    - #### init

          public void init()

      Resets all properties to default values.
      Overrides:
        `init` in class `PjWorkshop`

    - #### setGeometry

          public void setGeometry(PgElementSet geom)

      Assign an element set which must be a triangulation.

      Geometry is triangulated if it is no triangulation.

      Parameters:
        `geom` - may be `null` to indicate that the geometry shall be removed from this workshop.

    - #### update

          public boolean update(java.lang.Object event)

      Update the class whenever a child has changed. Method is usually invoked from the children.
      Specified by:
        `update` in interface `PsUpdateIf`
      Overrides:
        `update` in class `PjWorkshop`
      Parameters:
        `event` - sender of this update.
      Returns:
        true if update was correctly handled by superclass.
      See Also:
        `PsObject.setParent(PsUpdateIf)`, `PsObject.getFather()`, `PsObject.addUpdateListener(PsUpdateIf)`

    - #### makePatchTexture

          public static void makePatchTexture(PgElementSet geom)

      Assign same texture image to each element of a geometry. Currently, method requires that all elements are either triangles or quadrilaterals.

      Method assigns a texture to the geometry if not available. Texture image is either set to `PwTexture#m_defTriTexture` for triangulations, or to `PwTexture#m_defQuadTexture`.

    - #### makeDijkstraTexture

          public static void makeDijkstraTexture(PgElementSet geom)

      Generate element texture showing lines through all mid points of edges with different Dijkstra values at their ends.

      Method assigns a texture to the geometry if not available. Texture image is set to `PwTexture#m_defDijkstraTexture`.

    - #### makeThresholdTexture

          public static void makeThresholdTexture(PgElementSet geom,
                                  PdVector value,
                                  double threshold)

      Generate element texture by scalar data per vertex and a threshold value. The texture coordinates will put the threshold value to the center of the texture image.

      Method assigns a texture to the geometry if not available. // * Texture image is set to `PwTexture#m_defDijkstraTexture`.

    - #### makeThresholdTexture

          public static void makeThresholdTexture(PgElementSet geom,
                                  PdVector[] value,
                                  double[] threshold)

      Generate element texture by two sets of scalar data per vertex and two thresholds. The first pair of threshold and scalar data will be used for the u coordinate, the second pair for the v coordinate.The texture coordinates will put the threshold values to the center of the texture image.

      The value and threshold arrays should have size 2. Method assigns a texture to the geometry if not available. // * Texture image is set to `PwTexture#m_defDijkstraTexture`.

    - #### getLicSize

          public int getLicSize()

      Get length of the longest edge of triangles in texture domain. Used in burn().
      See Also:
        `burn()`

    - #### setLicSize

          public void setLicSize(int size)

      Set length of the longest edge of triangles in texture domain. Used in burn().
      See Also:
        `burn()`

    - #### burn

          public void burn()

      Burns surface colors to a new texture image using element textures. Elements are laid out in the plane and the maximal edges size measured in pixels is given by setLicSize().

      Methods requires an assigned elementSet and a display.

      HACK: Vertical gap between triangle rows is currently determined by static variable VGAP.

      See Also:
        `setLicSize(int)`, `setGeometry(jv.geom.PgElementSet)`

    - #### compactPeriodicTextures

          public static void compactPeriodicTextures(PdVector[][] texture)

      Translate texture coordinates of each element by an integer vector, such that the texture coordinates are close to 0. This makes sense for periodic, element based textures.

    - #### makeElementTextureCoords

          public static double[] makeElementTextureCoords(PgElementSet geom,
                                          int maxwidth)

      Calculates element texture coordinates for triangulation. Puts triangles in lines with longest edges at top.
      Parameters:
        `geom` - triangulation
        `maxwidth` - length of the longest edge of triangles in texture domain
      Returns:
        [(scaling factor from worldcoords->pixel)/(pixelwidth of texture)/(pixelheight of texture)]

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