Re: A86: Rotating sprites

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Rotating sprites
From: "David Phillips" <david@acz.org>
Date: Mon, 29 Mar 1999 17:42:38 -0600
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
References: <af7298f9.36ffec9a@aol.com><007d01be7a34$a9064100$4752dfd1@david> <19990329.183943.8654.0.V8r@juno.com>
Reply-To: assembly-86@lists.ticalc.org


Yeah, that's a good way to do it.  It's more "flipping" than "rotation",
though.  In Bomber Bloke, for example, there are mirror images created for
all of the character sprites.  The enemies and player can face left or
right, so instead of storing both directions, it just stores one and mirrors
them on startup.

(yes, I have studied the source to almost every "major" calculator
game...that is the best way to learn...you can learn so many programming
techniques and ideas that way)

> But would it be possible to easily rotate the sprites at a standard angle
> like 90 or 180.

Follow-Ups:

A86: ILine and Asm executes

From: Nicolas P Zagorin <ziggy2282@juno.com>

References:

A86: Rotating sprites

From: Bigskank9@aol.com

Re: A86: Rotating sprites

From: "David Phillips" <david@acz.org>

Re: A86: Rotating sprites

From: Chris Magill <v8r@juno.com>