Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
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Message: 6902
Author: ian.rushforth
Date: 06/09/2016
Subject: Re: Guardians/conveyors
Andrew wrote:
> The top row of pixels in the conveyor are animated by
rotating them TWO PIXELS AT A TIME - left rotate for
`left' and `off' conveyors; right rotate for `right' and
`sticky' conveyors. The third row of pixels in the
conveyor are rotated in the opposite
direction.
Point of correction: I believe that Off Conveyors animate to the right, like Right and Sticky Conveyors (in fact, all conveyors with a non-zero value for the Conveyor Direction Byte), as determined by the OR A command at #9510 (JSW) / #9111 (Manic Miner) which causes the 'Convey leftwards' code to be bypassed unless the Zero Flag is set (which only occurs for a true Left Conveyor).
JSWED displays Off Conveyors as animating to the left, but this isn't reflected in what you see happening during the game (at least, not with a JSW48 game).
In this respect, I believe that there is an error in the 'Conveyor: Direction and Position of Animation' section of Andrew's Manic Miner Room-Format page.
(Don't you just love a pedant? :-p )
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