[HN Gopher] Sub-pixel distance transform (2023)
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       Sub-pixel distance transform (2023)
        
       Author : ChadNauseam
       Score  : 61 points
       Date   : 2024-12-26 20:48 UTC (2 hours ago)
        
 (HTM) web link (acko.net)
 (TXT) w3m dump (acko.net)
        
       | bun_terminator wrote:
       | > some of the established practice on generating SDFs from masks
       | is incorrect
       | 
       | SDFs are for some reason riddled with false beliefs. Earlier this
       | year it drove me nuts to learn that boolean operations for SDFs
       | are not correct
        
         | like_any_other wrote:
         | > boolean operations for SDFs are not correct
         | 
         | They're not?
        
           | skykooler wrote:
           | They return approximations which can be very slow to iterate
           | over depending on how far off of the actual value they are.
        
         | edflsafoiewq wrote:
         | What do you mean by "boolean operations for SDFs are not
         | correct"?
        
         | msk-lywenn wrote:
         | How would you even do a boolean operation over two distances ?
        
       | doublerabbit wrote:
       | I've not seen "Grumpy wizards make toxic brew for the evil queen
       | and jack" before. Is suppose to be a pangram?
       | 
       | I see no H.
       | 
       | Edit: oh wow. I missed that one.
        
         | airstrike wrote:
         | The h is silent
        
         | Bjartr wrote:
         | it's in "tHe"
        
         | dandellion wrote:
         | "...tHe..."?
        
       | dang wrote:
       | Discussed at the time:
       | 
       |  _Sub-pixel distance transform_ -
       | https://news.ycombinator.com/item?id=36809404 - July 2023 (31
       | comments)
        
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       (page generated 2024-12-26 23:00 UTC)