JScript

JScript

• chris441962

  Thanks for your reply. My focus at this point isn't so much on the video playback functions, but rather the porting of purely interactive content to iHD. For example, I have a project that involves deploying several traditional arcade games that I have written for the web in Jscript (think Asteriods or board-style games) on HD DVD. Beyond changing the user interface controls from mouse-driven to controller keys, I wanted to research how much of the core game functions themselves will require modification (such as the AI systems, scoring, collision detection, etc.). These use typical Jscript functions such as SetInterval and constructs such as arrays. So I was looking for a reference to determine if certain top-level stuff like this was not supported.

  Any feedback would be appreciated, thanks

  
  

• Michael Mroch

  For me, a quick look at the examples provided by Sonic in the Advanced content creation Tool were more than enough to get the same functions as are found in all the retail discs ATM ...Bookmarking, Chapters, Pip, and all of the unique calls that you can make from script. The Sonic Examples will take you light years ahead!
  
  
  

• Duncan Bayne

  Prime shooter looks very much ready to go...on the other one the HTML would have to be re-written and the J-script changed alot. Primeshooter's commands look familiar from a quick glance.
  
  
  

• SJ0775

  I wanted to do this on my last project ... Let me see what your current script looks like. I can probably give you a good idea of what wont run and what will. I forget the name of it but there is a Jscript arcade emulator out there with sources. I think it only runs 20 or so games...Frogger, asteroids ect...
  
  
  

• constm

  The ECMAScript used in HD DVD is the Compact Profile (ECMA 327), which is a modification of traditional ECMAScript (ECMA 262). It's similar to normal JScript, with, of course fewer objects, and no "eval"

  If you check ECMA 262, you can get a list of the standard objects, and what they support. Most of what you need should be there, however, all the objects you could use to actually show data on the screen or affect the player are detailed in Annex Z of the HD DVD specification. You could probably get by if you look at a few samples that manipulate the application and document objects, especially the animated property stuff.

  
  

• Rhubarb

  Thanks again and happy new year. Yes, as I recall the chess game example used old-style HTML forms to draw the user interface and player controls, that stuff would all need to change to DOM elements. But beyond things specific to the browser window, are there any Jscript functions or data types that are not supported in iHD thanks
  

• Oguz

  Thanks very much, here are a couple open source examples of the type of games I'm doing:

  http://www.1729.com/math/integers/PrimeShooter.js

  http://p4wn.cvs.sourceforge.net/p4wn/chess/misc/ron/chesswork2.htm revision=1.1.1.1&view=markup

  The games work basically the same way AJAX does, however instead of communicating with an external data source, the Jscript functions themselves calculate the data that updates the DOM elements.

  
  

• Krutika

  Ohhh I forgot...there is also a board game included with the sonic examples...I never ran it though.
  
  
  

• Rainadaman

  Just took a quick look again at Prime shooter and I see this...
  
  "
  

  if (this.pos > this.maxPos)
  
  "
  
  I never used any <> signs in my Jscript..I dont know if that is ok. but 90% of it looks good...it will be small things like that that need to change. I am very interested in seeing this run on the HD-XA1 because when I wrote a script heavy Application sometimes it would lag a bit. Maybe Peter can take a look at Prime shooter and pick out more problems...He is the man.
  

  
  
  

• Crasch

  Thanks much, this is very helpful.
  
• JScript