Re: A82: 83 port : scalespr

To: assembly-82@lists.ticalc.org
Subject: Re: A82: 83 port : scalespr
From: Eric Piel <pieleric@etu.utc.fr>
Date: Thu, 11 May 2000 10:44:59 +0200 (MET DST)
In-Reply-To: <20000511001723.55071.qmail@hotmail.com>
Reply-To: assembly-82@lists.ticalc.org


Thank you, I was sure it was because of a stupid error but I couldn't find it
:-(

Eric

On Wed, 10 May 2000, Sam Heald wrote:
> 
>   The 83 version clears the graph memory during the display loop. Yours 
> doesn't. This works fine:
> 
> start:
> 	ld	hl,$0000	; initial scale factor
> 	ld	b,17		; number of frames
> aniLoop:
> 	push	bc
> 
> 	push hl
>         ld hl,GRAPH_MEM
> 	ld (hl),0
> 	ld de,GRAPH_MEM+1
> 	ld bc,767
> 	ldir
> 	pop hl
> 
> 	push	hl
> 	ld	b,SPR_HEIGHT
> 	ld	c,SPR_WIDTH
> 	call	getScaledSize	; A = scaled height, H = scaled width
> 	ld	b,a		; calculations to centre sprite on screen...
> 	ld	a,SPR_HEIGHT+(2*Y_OFFSET)
> 	sub	b
> 	sra	a
> 	ld	e,a		; E = y-position
> 	ld	a,SPR_WIDTH+(2*X_OFFSET)
> 	sub	h
> 	sra	a		; A = x-position
> 	pop	hl
> 
> 	push	hl
> 	ld	b,SPR_HEIGHT
> 	ld	c,SPR_WIDTH/8
> 	ld	ix,picShoes
> 	call	putScaledSprite
> 	call	CR_GRBCopy
> 	pop	hl
> 
> 	ld	de,$0010	; increase scale factor
> 	add	hl,de
> 
> 	pop	bc
> 	djnz	aniLoop		; display next frame
> 
> 	jp	CR_KHAND
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
> 
>

References:

Re: A82: 83 port : scalespr

From: "Sam Heald" <evil_sam@hotmail.com>