Path: chuka.playstation.co.uk!news
From: Harvey Cotton <hc054@mdx.ac.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Looking for...
Date: Fri, 01 Jan 1999 10:39:44 +0000
Organization: PlayStation Net Yaroze (SCEE)
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Robert Ruza wrote:
> 
> Hello!
> 
> I'm looking for an simple tree Model in RSD-Format with 4Bit Textures.
> And could someone give me a functioning 3d Sprite Routine, or post it
> here? Yes, I saw the old messages, but I would like to get it in one
> piece, that would be more than nice....8-D
> 
> Meanwhile...I wish you happy new YEAR!!!!!!!
> 
> PlayStation ruuullleeeeeeezzzz.
> 
> With best regards,
> 
> Rob

Heres a function to draw a 3d sprite:

void draw_3dsprite (GsSPRITE *sprite,long x,long y,long z,short
precision)
{
	VECTOR transformedPosition,position={x,y,z};
	ApplyMatrixLV(&GsWSMATRIX,&position,&transformedPosition);
        transformedPosition.vz+=GsWSMATRIX.t[2];
	if (transformedPosition.vz>0)
	{
	        transformedPosition.vx+=GsWSMATRIX.t[0];
	        transformedPosition.vy+=GsWSMATRIX.t[1];
		sprite.scalex=sprite.scaley=16777216/transformedPosition.vz;
	        sprite.x=(transformedPosition.vx*250)/transformedPosition.vz;
	        sprite.y=(transformedPosition.vy*250)/transformedPosition.vz;
	
GsSortSprite(&sprite,&OTable_Header[CurrentBuffer],transformedPosition.vz>>(precision-2));
	}
}

Substitute the "250" for the whatever you've set your projection
distance to.
-- 
Regards  |  E-mail: hc054@mdx.ac.uk
Harvey   |  ICQ: 4269478