[HN Gopher] Alf 2: Collision Detection Is Hard, Blog Posts Are H...
       ___________________________________________________________________
        
       Alf 2: Collision Detection Is Hard, Blog Posts Are Harder
        
       Author : zdw
       Score  : 69 points
       Date   : 2021-08-14 19:23 UTC (2 days ago)
        
 (HTM) web link (nicole.express)
 (TXT) w3m dump (nicole.express)
        
       | TacticalCoder wrote:
       | > ...hardware collision detection feature of the Master System.
       | This feature triggers a flag when two sprites collide, but does
       | not tell you _which_ sprites collided.
       | 
       | I want to say... WTF!? This is kinda evil, I have no idea and I
       | love it!
       | 
       | > Alf 2: Collision Detection Is Hard, Blog Posts Are Harder
       | 
       | I did semi-recently re-write an amazing collision detection
       | technique I found by myself and used around 1991 (it was fast and
       | flawless) and I even wrote some (Clojure, whatever) code to
       | create "nice looking images" to explain visually the technique. I
       | even started working on the blog post but...
       | 
       | It's not done yet so you have no idea how I agree with this
       | title...
       | 
       | (part of the problem being that I haven't a blog yet. I've got
       | some material: several things I want to write about and the name
       | of the blog and, heck, I wrote entire books in the past so it's
       | not as if writing was that problematic)
        
         | pol4ko wrote:
         | Hey, where can I check this blog? Im interested in collision
         | detection in games.
        
           | TacticalCoder wrote:
           | Well that's the thing... I haven't published anything yet. I
           | don't even know which blogging platform I'll use. It's on my
           | TODO list though so.. One day.
        
         | tyingq wrote:
         | I did find that kind of odd. Even the old C64 would set bits to
         | tell you which sprites collided.
        
         | TrueDuality wrote:
         | Feels. I found my static site generator got updated in a way
         | that wasn't backwards compatible, and it stopped being able to
         | generate my site. The older versions of the software got pulled
         | and I wasn't very happy with it anyway, so I've been slowly
         | migrating to another one.
         | 
         | It hasn't stopped me from writing posts... Which does feel a
         | bit odd... They're just not getting published.
        
       | LordN00b wrote:
       | A nice follow up on a very dry topic. And a well done, for a very
       | definite improvement in communicating the results of their
       | investigation (Red/black border issues not withstanding ;) )
        
       | allturtles wrote:
       | > As I noted in the prior blog post, the Sega Master System has a
       | tilemap that's only 256 pixels wide, the same as the display
       | area. Therefore, the image is slightly off-center
       | 
       | For anyone else for whom this made no sense, the off-center image
       | is a tradeoff to allow for smooth horizontal scrolling when the
       | tilemap that is used as the source for the display is the same
       | size as the available display area. This is indeed explained in
       | this prior post linked by the author
       | (https://nicole.express/2021/sega-system-1-system-1.html).
        
       | croes wrote:
       | Duplicate https://news.ycombinator.com/item?id=27968292
        
         | detaro wrote:
         | that's not the same article...
        
       | avnigo wrote:
       | Here's the article on Part 1:
       | 
       | https://nicole.express/2021/remember-alf.html
        
       ___________________________________________________________________
       (page generated 2021-08-16 23:01 UTC)