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Presentation

Concept

Presentation mostly consist of motions of sections (specified by movement of two their ends), and also of changes of colours of nodes and sections and colours of other objects. It's necessary to group not only two motions (two ends of line), but also motion of many lines through different time interval. It's more comfortable to write this finite automaton by listing saments, instead of writing functions by JavaScript (by the way, only not attached points of broken line can execute sament dot, i.e. all intermediate points and, if it is not attached, one of end's points).

<pn>
  <dot name=B num=10 x=50 y=70 ns=style-k>
  <dot name=C num=20 x=80 y=90 ns=style-m>
  <obj name=D ns=style-n>
  <obj name=E ns=style-p>
</pn>

It's necessary to specify name "pn", anticipated by colon, in field "new state" of transition sheet to execute presentation.

css1 F10 :pn

Let's write down all presentations in a separate file, for example, "b.txt", and add following tag inside tag head

<link src="./b.xml" type="presentation">

Saments, specifing in presentation (and sending by server), contain seribute event (instead of ns), that it's possible to change reaction on event in one file of transition sheet, instead in many server's scripts.

Saments
browserserver	presentation, browserserver
<dot name= id= event= os= ns= x= y= > <dot name= id= event=del> <dad name= id= onname= onid= > <section name= id= event= os= ns= > <_ name= event= arg= arg2= > <obj name= event= os= ns= > <pres name= event= os= exec= >	<dot name= id= event= x= y= time= > <dot name= id= event= x= y= speed= > <dot name= id= event=del time= > <dot name= id= event=del speed= > <section name= id= ns= > <_ name= event= arg= arg2= > <obj name= ns= > <pres name= exec= > <sound src= > <say type= data= class= >

Saments

browser

server

presentation, browser

server

<dot     name= id= event=  os=  ns= x= y= >

<dot     name= id= event=del>

<dad     name= id= onname= onid= >
<section name= id= event=  os=  ns= >
<_       name=     event=  arg= arg2= >
<obj     name=     event=  os=  ns= >
<pres    name=     event=  os=  exec= >

<dot     name= id= event= x= y= time= >
<dot     name= id= event= x= y= speed= >
<dot     name= id= event=del    time= >
<dot     name= id= event=del    speed= >

<section name= id= ns= >
<_       name=     event= arg=  arg2= >
<obj     name=     ns= >
<pres    name=     exec= >
<sound   src= >
<say     type=     data=  class= >

Additional parameters of movements: time

When it's necessary, that location of point will changed not by jump, but smoothly, during some time, attribute time is used, which defines time of moving. If not time, but speed is need to be set, then atribute speed is used in millimeters per second (mm/sec). Absence of both these parameters is equivalent to time = 0 and speed = ∞ Parameters time and speed are exclusive mutually.

<dot  name= x=  y=  num= time=  >
<dot  name= x=  y=  num= speed= >

Additional movements: sound

It's necessary in some cases, that browser announce a speech comment or play a sound file. There are following sources of a sound:

speech - let's enter a sound command say with parameters: source type, source, style (of aural style sheet) and name they as type, data, class. Values of type are the following:
- ph (phrase) - it's necessary to pronounce value of attribute data. It's default value.
- id (identifier) - it's necessary to pronounce textual contents of tag (and sub-tags, enclosed in it), unique identifier id of which is equal to specified in attribute data
- sil (silence) - absence of a sound during time, specified in attribute data in seconds
Presentation should perceive only the following properties from aural style sheet, specified in parameter class: volume, pitch, pitch-rate, voice-family, richness, azimuth, elevation, speech-rate, speech-punctation, speech-numeral, play-during.
```
<say type=ph  data="pronounce that" class=v1>
<say type=id  data="id1"            class=v2>
<say type=sil data="5.56">
```
file: wav, mpg, etc - let's enter a sound command sound with attribute src - it's necessary to pronounce contents of sound file, which path is specified in attribute src
```
<sound src=./filename.wav>
<sound src=./filename.mpg>
```

Details

Simultaneity and consequence of saments

Browser executes saments consistently. It executes saments simultaneously, which are inside sament <<>>. It execute consistently such saments inside simultaneous part of execution, which are inside sament <>. When change of a state, of a location and playing a sound occur simultaneously, then duration of this simultaneous event is equal to greatest of duration.

<pn>
  <<>>
    <dot name=B id=10 x=50 y=70>
    <dot name=C id=20 x=80 y=90>
  <</>>
  <<>>
    <obj name=D ns=style-n>
    <obj name=E ns=style-p>
  <</>>
</pn>

<pn>
  <<>>
    <<>>
      <dot name=B id=10 x=50 y=70>
      <dot name=C id=20 x=80 y=90>
    <</>>
    <obj name=D ns=style-n>
  <</>>
  <obj name=E ns=style-p>
</pn>

Properties of presentation

Presentation has facultative attribute class, which refers to usual css-file, attached to html-document.

<pn class=a> ... </pn>

Following parameters are in style of presentation: dozing (doze), synchronism (sync), cycleness (cycle), listed in a separate file.

pn.a {
  doze:  pause;
  sync:  noserver;
  cycle: 9;
}

Parameter doze specifies, how presentation should react, if it will be started once more by user or server during execution time. Browser don't pay attention at other presentations during that.

home - return objects in a previous status, begin execution of presentation at first (default value)
group of values, stoping executing of presentation, not returning objects in a previous status, but differing by reaction to 3-rd start of presentation

pause - continue work of presentation from the interrupted place at 3-rd start
repeat - return objects in a previous status and execite presentation at first at 3-rd start

break - don't execute presentation any more for that calling object

Parameter sync specifies, when other presentation should be executed, which is started during executing of this presentation.

market - execute other presentation immediately, sounds of different presentations are played simultaneously (default value)

dialogue - other presentation becomes in common queue and waits for end of executing of all before started presentations

group of values, specifing which other presentations should be put in common queue, and which should be rejected

noserver - ignore presentations, started by server
nouser - ignore presentations, started by user

Parameter cycle specifies quantity of repetitions of executing. It can be an integer or value loop, specifing to repeat indefinitely. Parameter is equal to one by default (play one time).

Form sends

If object, which call presentation, is inside tag form, then browser informs server about performance of a presentation. Form sends data only after executing of presentation. Browser does not check possibility of performance of all commands in presentation before a beginning of performance.

<pres name=A  event= os= exec=pn>

Dmitry Turin

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