Path: chuka.playstation.co.uk!news1.scei.co.jp!scea!peter_alau@playstation.sony.com
From: Elliott Lee <tenchi@jps.net>
Newsgroups: scea.yaroze.announce
Subject: Re: New Yaroze Dev FAQ
Date: Mon, 29 Jun 1998 15:58:58 -0700
Organization: Cisco Systems
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Sections cut to save space.

Jamin Frederick wrote:
	[...]
> Yaroze Dev FAQ  0.5
> 
> DEFINITIONS
> -----------
	[...]
> CLUT - color look-up table (4-bit or 8-bit)

Change to:

	CLUT - Color Look-Up Table.  A color map for 4-bit and 8-bit
	sprites.

	[...]
> main memory - memory used for normal program storage and operation; also the
> initial place for all incoming code and data when a yaroze project is
> downloaded

Add:

	Each Playstation contains 2 MB of main memory, of which about 512 KB
	is used by the operating system (0x80000000-0x8008ffff) leaving
	approximately 1.4 MB for use.

> model - the information making up the 3D representation of a game object; it
> includes orientation of the primitives making up the object and their coloring
> attributes

Probably should be changed to "3D model".

You should also add in entries for all the file format types.

> <FILE FORMATS>
> 
> TIM = image file
> RSD = intermediate model file
> TMD = playstation format model(s) file

You should probably make this into a heirarchy.  e.g.

	FILE FORMATS
	------------
	Graphics:
	  RSD - intermediate model file
	  TIM - bitmap image file
	  TMD - Playstation format model(s) file
	Sound:
          DEF - instrument definition file
          SEQ - Playstation music sequence file.  Usually
	        generated by SMF2SEQ.
	  VAB - soundwave data file containing VAGs and a DEF
          VAG - individual soundwave data file.  Generated by
                AIFF2VAG or WAV2VAG.
	  VB  - soundwave data file generated by splitting a
                VAB
          VH  - soundwave data file generated by splitting a
                VAB
	Utilities:
	  SIO - common SIOCONS batch file extension

	[...]
> IMAGES
> ------
> 
> 1) Where do my images have to be aligned in video memory?

They should be aligned on 16-byte boundaries.  Try to ensure that your
TIM stays within one of the 32 designated texture pages.

> 3) Can I have more than one image on a given texture page?  Can I arrange
> several images next to each other within the texture page?

Yes, as long as you abide by #1.

> 6) How do you set up transparency for a sprite / texture?

Ensure that when you converted your bitmap to TIM format that you have
enabled the transparency bit.  This can be done by putting a checkmark in
the
appropriate boxes in TimUtil.  Then, when setting up your GsSPRITE
structure,
make sure the transparency attribute is set correctly.

> 8) What do the different translucency settings mean?
> 
> 50% back + 50% polygon
> 100% back + 100% polygon
> 100% back - 100% polygon
> 100% back + 25% polygon

This is additive transparency which manipulates the RGB values per pixel
based on the new image's RGB values.  For example, if you use the
"50% back + 50% polygon", then for each pixel in the display buffer (where
the new image is being placed) the old pixel's RGB values are reduced by
50% intensity and are added to 50% of the intensitiy of the new image.

	[...]

> **SCEA member sites:

Please add:

	DMS (S3M module player for Yaroze)
	http://www.scea.sony.com/net/yaroze/pages/elee2.html

Mata ne,           ...                                          ...
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