Animation controller for WorldCanvasHolders. More...

#include <Animator.h>

Public Types
enum	NextMode { NEXT_FORWARD, NEXT_BACKWARD, NEXT_ROCKANDROLL }
	Defines the way the Animator calculates the Z coordinate of the next frame in the sequence. More...
enum	MatchMode { MATCH_INDEX, MATCH_WORLD, MATCH_LIST_ONLY }
	Defines wheter the sequence is defined using the index in the sequence or by the world coordinate of the 'Z-axis' (the "zValue" or "zIndex" used by the WorldCanvasHolders and the DisplayDatas), or only by the AttributeBuffers. More...
enum	UpdateMode { UPDATE_DIRECT, UPDATE_BLINK }
	Decides whether the Z coordinate should be changed according to the NextMode before each update or not. More...
Public Member Functions
	Animator ()
	Constructor.
virtual	~Animator ()
	Destrutor.
virtual void	nextCoord ()
	Go to next Z coordinate in sequence.
virtual void	prevCoord ()
	Go to previous Z coordinate in sequence.
virtual void	gotoCoord (Double zCoord)
	Go to Z coordinate zCoord.
virtual void	setStep (uInt zIncrement)
	Set increment in the Z coordinate for the movie.
virtual void	setStep (Double zIncrement)
virtual void	setTolerance (uInt tolerance)
	Set the tolerance in the Z coordinate.
virtual void	setTolerance (Double tolerance)
virtual void	setMinAndMaxCoord (Double zMin, Double zMax)
	Set the minimum and maximum Z coordinate for the movie.
virtual void	setMatchMode (Animator::MatchMode match)
	Set whether "zIndex", "zValue" or none of the two should be written additionally to the AttributeBuffers.
virtual void	setNextMode (Animator::NextMode mode)
	Set the way the increments are done, ie.
virtual void	setUpdateMode (Animator::UpdateMode mode)
	Set whether an increment should be done before each update (UPDATE_DIRECT or UPDATE_BLINK)
virtual void	setUpdateInterval (Double interval)
	Set update interval of movie in milliseconds.
virtual void	setBlinkRestrictions (List< void * > *attBuffers)
	Set the list of additional Attributes that the Animator places on the WorldCanvasHolders before each update.
virtual void	clearBlinkRestrictions ()
	Remove the List with AttributeBuffers.
virtual void	startMovie ()
	Stop and start movie.
virtual void	stopMovie ()
virtual uInt	getMovieLength ()
	Return the length of the movie.
virtual Int	getCurrentPosition ()
	Return the current position in the movie.
virtual void	reset ()
	Reset the Animator.
virtual void	addWorldCanvasHolder (WorldCanvasHolder *newHolder)
	Add a WorldCanvasHolder to the list controlled by this Animator.
virtual void	removeWorldCanvasHolder (WorldCanvasHolder &holder)
	Remove a WorldCanvasHolder from the list controlled by this Animator.
virtual void	operator() (const WCRefreshEvent &ev)
	Refresh event handler - just used to see if resetCoordinates was set.
Private Member Functions
void	computeNextCoord (Int addOrSubtract)
	Compute, based on the UPDATE_MODE and NEXT_MODE, the Z coordinate of the new frame to display (ie.
void	increment (Int &number, Int addOrSubtract)
	Helper routine for computeNewCoord().
void	decrement (Int &number, Int addOrSubtract)
	Helper routine for computeNewCoord().
void	increment (Double &number, Int addOrSubtract)
	Helper routine for computeNewCoord().
void	decrement (Double &number, Int addOrSubtract)
	Helper routine for computeNewCoord().
void	writeRestrictions ()
	Write the necessary Attributes to all the WorldCanvasHolders.
void	refresh ()
	Invoke refresh() on all the WorldCanvasHolders registered with the Animator.
Int	listLen ()
	Return the number of AttributeBuffers in the List of AttributeBuffer.
Private Attributes
List< void * >	holderList
	List of WorldCanvasHolders.
List< void * > *	attBufList
	List of the AttributeBuffers.
Double	minCoord
	parameters of movies
Double	maxCoord
Double	movieStep
	Increment for computing currentCoord.
Double	coordTolerance
	State variables Tolerance for coordinate Restriction.
Double	currentCoord
	Current Z coordiante.
Animator::MatchMode	matchMode
	the MatchMode
Animator::NextMode	nextMode
	the NextMode
Animator::UpdateMode	updateMode
	The UpdateMode.
Double	updateInterval
	and the interval of the timer
Int	numberInList
	The number of the AttributeBuffer to use.
Int	movieDirection
	In which direction the movie is currently going.
AnimatorRefEH *	itsAnimatorRefEH
	refresh event handler

Detailed Description

Animation controller for WorldCanvasHolders.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

Etymology

An Animator animates animations

Synopsis

TBW

Example

First example is making a simple movie of all the channels in a data cube

    // Create a PixelCanvas for X11 to draw on
    X11PixelCanvas(parent, xpcctbl, width, height) ;
    // and a World Coordinate  interface for this PixelCanvas
    WorldCanvas  wCnvs(&pixelCnvs);
   
    // Create a WorldCanvasHolder
    WorldCanvasHolder wCnvsHldr(&wCnvs);
   
    // Create an ImageDisplayData object of the data cube to display the 
    // channels (assuming 3rd axis is velocity in this cube) 
    ImageDisplayData cube(myDataSet, 0, 1, 2); 
    // and register this with the WorldCanvasHolder
    wCnvsHldr.addDisplayData(&cube);
   
    // Create an Animator for the WorldCanvasHolder and register the
    // WorldCanvasHolder
    Animator animator;
    animator.addWorldCanvasHolder(&wCnvsHldr);
   
    // start with first channel
    animator.setMin(0.0);            
    // last channel of cube (assuming it has 30 channels)
    animator.setMax(29.0);
    // go in steps of one channel
    animator.setStep(1.0);
    // only one channel at a time, so tolerance must be less than 1.0
    anomator.setTolerance(0.1);
    // display new channel every 0.2 sec
    animator.setUpdateInterval(0.2);
    // we want a normal boring movie
    animator.setNextMode(animator::NEXT_FORWARD); 
    // and we define the channel (ie index)
    animator.setMatchMode(Animator::MATCH_INDEX);
    // set the Update method
    animator.setUpdateMode(Animator::UPDATE_DIRECT);
    // and start the movie
    animator.startMovie();
          .
          .
          .
    // After a while we want to change to Rock & Roll mode:
    animator.setMovieMode(Animator::NEXT_ROCKandROLL);
          .
          .
          .
    // and after another while we stop
    animator.stopMovie();

Second example is that we want to blink between channel 20 of the previous cube and an optical image

    // Create an ImageDataDisplay of the image and register with
    // the WorldCanvasHolder
    ImageDataDisplay image(myImage, 0, 2);
    wCnvsHldr.addDisplayData(&image);
   
    // Create a List to contain the AttributeBuffers
    List<void *> buffList;
    // and an iterator for this list
    ListIter<void *> it(&buffList);
   
    // Create AttributeBuffers and fill them
    AttributeBuffer atBuff1;
    // This is to mark the cube. The name and value of the Attribute or 
    // Attributes that can be used is arbitrary, as long as the different 
    // AttributeBuffers in the List select different datasets (even that is
    // not really necessary, but you will be blinking between the same frames 
    // and not many people will get excited about that....)
    atBuff1.add("AjaxWordtKampioen", "yes");
    it.addRight((void *) &attBuff1);
    
    // the buffer for the image
    AttributeBuffer atBuff2;
    atBuff2.add("AjaxWordtKampioen", "of course");
    at.addRight((void *) &attBuff2);
   
    // and set this list on the Animator
    animator.setBlinkList(&buffList);
    
    // Set the same attributes on the DisplayDatas so the Attribute matching
    // mechanism between the WorldCanvasHolder and the DisplayDatas will select
    // the right data at the right time automatically
    cube.addAttribute(attBuff1);
    image.addAttribute(attBuff2);
   
    // Tell animator to use channel 20
    animator.gotoCoord(20.0);
    // The Animator should write "zIndex" to select channel 20
    animator.setMatchMode(Animator::MATCH_INDEX);
    // Because we set the UpdateMode to UPDATE_BLINK, the zIndex does
    // not change each time the timer goes off.
    animator.setUpdateMode(Animator::UPDATE_BLINK);
    // and the blinking can start:
    animator.startMovie();
          .
          .
          .
    // After a while we want to blink between channel 19 and the optical image.
    // this is done by setting NextMode to NEXT_BACKWARD and invoke nextCoord().
    // Of course we could also have used only animator.prevCoord(), but just
    // to show the principle..\.
    animator.setNextMode(Animator::NEXT_BACKWARD);
    animator.nextCoord();
   
    
    // We can add a third data set, set "AjaxWordtKampioen" to "always" for that data,
    // and the blinking is between 3 datasets: 
   
    // stop the blinking
    animator.stopMovie(); 
   
    // Create DisplayData from data
    ImageDataDisplay image2(mySecondImage, 0, 2);
   
    // Add to WorldCanvasHolder
    wCnvsHldr.addDisplayData(&image2);
   
    //Setup AttributeBuffer
    AttributeBuffer atBuff3;
    atBuff3.add("AjaxWordtKampioen", "always");
   
    // add to data
    image2.addAttribute(attBuff3);
   
    // and add to List
    at.addRight((void *) &attBuff3);
   
    // set the updated list on the animator (strictly speaking not neseccary
    // here, because animator already has the address of this List, but...)
    animator.setBlinkList(&buffList);
   
    //and go!!!
    animator.startMovie();

The third example is to run movies, selected on world coordinates on two WorldCanvasHolders in synch:

    // Create a PixelCanvas for X11 to draw on
    X11PixelCanvas(parent, xpcctbl, width, height) ;
    // and two  WorldCanvases side by side on the same PixelCanvas
    WorldCanvas wCnvs1(&pixelCanvas, 0.0, 0.25, 0.5, 0.5);
    WorldCanvas wCnvs2(&pixelCanvas, 0.5, 0.25, 0.5, 0.5);
   
    // A WorldCanvasHolder for each WorldCanvas
    WorldCanvasHolder wCnvsHldr1(&wCnvs1);
    WorldCanvasHolder wCnvsHldr2(&wCnvs2);
   
    // We have an HI data cube of an object
    ImageDisplayData HIcube(HIdata, 0, 1, 2);
    // that we display on the first WorldCanvas
    wCnvsHldr1.addDisplayData(HIcube);
    
    // and we have a CO cube of the same object that we display on the second
    // WorldCanvas
    ImageDisplayData COcube(COdata, 0, 1, 2);
    wCnvsHldr2.addDisplayData(COcube);
    
    // Create an animator and register the two WorldCanvasHolders
    Animator animator;
    animator.addWorldCanvasHolder(wCnvsHldr1);
    animator.addWorldCanvasHolder(wCnvsHldr2);
   
    // Set the movie parameters:
    // Select on world coordinate (ie velocity)
    animator.setMatchMode(Animator::MATCH_WORLD);
    // start and end velocities
    animator.setMinAndMax(1200.0, 1400.0);
    // and the tolerance to 10.0 and the step to 20.0
    animator.setTolerance(10.0):
    animator.setStep(20.0);
   
    // Set speed of movies and the mode
    animator.setUpdateInterval(0.2);
    animator.setNextMode(Animator::ROCKandROLL);
   
    // Now, on the first canvas a movie will be played of the HI data, and on
    // the second canvas a movie of the CO data. Because the selection is done
    // on world coordinate, the two movies display the data of the same 
    // velocity (within the tolerance of 10.0), in steps of 20.0, synchronized,
    // regardless of the channel separation of the two datasets:
    animator.startMovie();

Motivation

To allow for easy control of movies, possibly synchonous on more than one WorldCanvas, as well as lay the basis for the userinterface for this, a central class is needed that controls sequences of DisplayData.

To Do

make Animator know about Units

Definition at line 285 of file Animator.h.

Member Enumeration Documentation

enum casa::Animator::MatchMode

Defines wheter the sequence is defined using the index in the sequence or by the world coordinate of the 'Z-axis' (the "zValue" or "zIndex" used by the WorldCanvasHolders and the DisplayDatas), or only by the AttributeBuffers.

Enumerator:

MATCH_INDEX

Sequence is defined by writing Attribute "zIndex" with the value of the Z coordinate to WorldCanvasHolders, plus the ones from the List of AttributeBuffers.

This is the default

MATCH_WORLD

Sequence is defined by writing Attribute "zValue"with the value of the Z coordinate to WorldCanvasHolders, plus the ones from the List of AttributeBuffers.

MATCH_LIST_ONLY

Only the Attributes from the List of AttributeBuffers are written.

Definition at line 311 of file Animator.h.

enum casa::Animator::NextMode

Defines the way the Animator calculates the Z coordinate of the next frame in the sequence.

This defines the behaviour of the member nextCoord().

Enumerator:

NEXT_FORWARD

Movie in forward direction.

Step is added, if the Z coordinate is larger than maximum then display minimum, increment again until maximum, etc. This is the default.

NEXT_BACKWARD

Movie in backward direction.

Step is subtracted, if Z coordinate is smaller than mimnimum then display maximum, decrement until minimum, etc etc

NEXT_ROCKANDROLL

Movie goes up and down the sequence.

Step is added until the Z coordinate is larger than maximum, then step is subtracted until the Z coordinate is smaller than minimum, then step is added, and so on, and so on

Definition at line 292 of file Animator.h.

enum casa::Animator::UpdateMode

Decides whether the Z coordinate should be changed according to the NextMode before each update or not.

Enumerator:

UPDATE_DIRECT

Do change the Z coordinate before each update.

Use this for 'normal movies'. This is the default.

UPDATE_BLINK

Do not change Z coordinate, but rely on the AttributeBuffers to change what is displayed.

Use this for blinking.

Definition at line 327 of file Animator.h.

Constructor & Destructor Documentation

casa::Animator::Animator ( )

Constructor.

virtual casa::Animator::~Animator ( ) [virtual]

Destrutor.

Member Function Documentation

virtual void casa::Animator::addWorldCanvasHolder ( WorldCanvasHolder * newHolder ) [virtual]

Add a WorldCanvasHolder to the list controlled by this Animator.

virtual void casa::Animator::clearBlinkRestrictions ( ) [virtual]

Remove the List with AttributeBuffers.

void casa::Animator::computeNextCoord ( Int addOrSubtract ) [private]

Compute, based on the UPDATE_MODE and NEXT_MODE, the Z coordinate of the new frame to display (ie.

the new currentCoord). If the updateMode == UPDATE_BLINK, nothing happens. If the updateMode == UPDATE_DIRECT, the value of currentCoord is incremented or decremented with the absolute value of movieStep, depending in whether the next_Mode is NEXT_FORWARD, NEXT_BACKWARD or NEXT_ROCKANDROLL and whether the new value goes outside the bounds set by minCoord and maxCoord.

void casa::Animator::decrement	(	Int &	number,
		Int	addOrSubtract
	)		`[private]`

Helper routine for computeNewCoord().

The inverse of increment(Int&, Int)

void casa::Animator::decrement	(	Double &	number,
		Int	addOrSubtract
	)		`[private]`

Helper routine for computeNewCoord().

The inverse of increment(Double&, Int)

virtual Int casa::Animator::getCurrentPosition ( ) [virtual]

Return the current position in the movie.

This is really a bad thing, but needed in the interim for the viewer.

virtual uInt casa::Animator::getMovieLength ( ) [virtual]

Return the length of the movie.

In UpdateMode UPDATE_DIRECT this is the number of frames that follow from the minimum and maximum Z coordiante and the step. In UPDATE_BLINK mode this is the length of the List of AttributeBuffers set on the Animator using setBlinkAttributes

virtual void casa::Animator::gotoCoord ( Double zCoord ) [virtual]

Go to Z coordinate zCoord.

void casa::Animator::increment	(	Int &	number,
		Int	addOrSubtract
	)		`[private]`

Helper routine for computeNewCoord().

If addOrSubtract > 0, 1 is added to number, if addOrSubtract < 0, 1 is subtracted

void casa::Animator::increment	(	Double &	number,
		Int	addOrSubtract
	)		`[private]`

Helper routine for computeNewCoord().

If addOrSubtract > 0, movieStep is added to number, if addOrSubtract < 0, movieStep is subtracted

Int casa::Animator::listLen ( ) [private]

Return the number of AttributeBuffers in the List of AttributeBuffer.

virtual void casa::Animator::nextCoord ( ) [virtual]

Go to next Z coordinate in sequence.

virtual void casa::Animator::operator() ( const WCRefreshEvent & ev ) [virtual]

Refresh event handler - just used to see if resetCoordinates was set.

If so, then we should partially reset the animator.

virtual void casa::Animator::prevCoord ( ) [virtual]

Go to previous Z coordinate in sequence.

void casa::Animator::refresh ( ) [private]

Invoke refresh() on all the WorldCanvasHolders registered with the Animator.

virtual void casa::Animator::removeWorldCanvasHolder ( WorldCanvasHolder & holder ) [virtual]

Remove a WorldCanvasHolder from the list controlled by this Animator.

virtual void casa::Animator::reset ( ) [virtual]

Reset the Animator.

This will set the minimum coordiante to 0, the maximum to the number of elements registered with the WorldCanvasHolders, the step to 1.0 and the update mode to MATCH_INDEX

Referenced by casa::AniPosEH::resetAnimator().

virtual void casa::Animator::setBlinkRestrictions ( List< void * > * attBuffers ) [virtual]

Set the list of additional Attributes that the Animator places on the WorldCanvasHolders before each update.

virtual void casa::Animator::setMatchMode ( Animator::MatchMode match ) [virtual]

Set whether "zIndex", "zValue" or none of the two should be written additionally to the AttributeBuffers.

virtual void casa::Animator::setMinAndMaxCoord	(	Double	zMin,
		Double	zMax
	)		`[virtual]`

Set the minimum and maximum Z coordinate for the movie.

virtual void casa::Animator::setNextMode ( Animator::NextMode mode ) [virtual]

Set the way the increments are done, ie.

it defines the action of nextCoord() (options NEXT_FORWARD, NEXT_BACKWARD, UPDATE_ROCKANDROLL)

virtual void casa::Animator::setStep ( uInt zIncrement ) [virtual]

Set increment in the Z coordinate for the movie.

virtual void casa::Animator::setStep ( Double zIncrement ) [virtual]

virtual void casa::Animator::setTolerance ( uInt tolerance ) [virtual]

Set the tolerance in the Z coordinate.

virtual void casa::Animator::setTolerance ( Double tolerance ) [virtual]

virtual void casa::Animator::setUpdateInterval ( Double interval ) [virtual]

Set update interval of movie in milliseconds.

virtual void casa::Animator::setUpdateMode ( Animator::UpdateMode mode ) [virtual]

Set whether an increment should be done before each update (UPDATE_DIRECT or UPDATE_BLINK)

virtual void casa::Animator::startMovie ( ) [virtual]

Stop and start movie.

virtual void casa::Animator::stopMovie ( ) [virtual]

void casa::Animator::writeRestrictions ( ) [private]

Write the necessary Attributes to all the WorldCanvasHolders.

The content of one of the registered AttributeBuffer is always written. If the updateMode == UPDATE_DIRECT the n-th AttributeBuffer is written, where n is the sequence number of the frame, based on minCoord and movieStep. If the updateMode == UPDATE_BLINK the Animator just loops through the list of AttributeBuffers based on numberInList. If MatchMode == MATCH_INDEX also an Attribute is written with name "zIndex" and with the value of currentCoord. If MatchMode == MATCH_COORD also an Attribute is written with name "zValue" and with the value of currentCoord.