Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines
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Message: 7088
Author: ian.rushforth
Date: 10/03/2017
Subject: Re: JSWED: Andrew's comments (Sections 6.6--6.9; Chapters 7, 8)
Andrew wrote:
> A JSW author should be aware of the order in which objects are drawn:
> 1. elementary blocks (background, floor, wall and static nasty);
> 2. ramp and conveyor
> 3. the player
> 4. guardians
> 5. items
> 6. Maria or the toilet
> (http://www.geocities.com/andrewbroad/spectrum/willy/collision.html
> has a much more detailed explanation of collision-detection)
I believe that in JSW, Maria and the Toilet are actually drawn after Willy, but before the guardians (items being drawn last).
However, special objects (Eugene/Skylabs/vertical guardians/Kong/Solar Beam - although the latter doesn't have any infilled pixels so its collisions are attribute-based) are drawn after the items in MM - and then portals are the last thing to be drawn to the screen buffer before it is copied to the display file.
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