[HN Gopher] An Introduction to ASCII Ray Marching
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       An Introduction to ASCII Ray Marching
        
       Author : c-st
       Score  : 102 points
       Date   : 2021-03-07 12:48 UTC (1 days ago)
        
 (HTM) web link (ch-st.de)
 (TXT) w3m dump (ch-st.de)
        
       | pdkl95 wrote:
       | I ported it to aalib. Instead of a 7 character linear ramp, the
       | aalib version renders to a larger framebuffer, dithers it down to
       | the closes matching characters.
       | 
       | https://gist.github.com/pdkl95/094cc065ab0215e121da29a63e6c1...
       | ajWm##Xs,           aWWWWBm##S2s,          jQQWQWWmm#XXov,
       | _QQQQWWBBm#ZX2n(         ]QQQWWWBmm#XXovl
       | 4WWWWWmmm#XX2ovi`         ]mBBmmmm#XXXonl|
       | ###m##ZZXSonI|`          -XZZZXXXonvI|~            "Xo2onvvi+`
       | -"^^~~
        
       | philzook wrote:
       | I love it. It's brilliant to side step the whole issue of how to
       | get access to pixels on your screen or in a png, which in some
       | instances is an awful afternoon of frustration. It's almost
       | always easy to get printing going.
        
       | samus wrote:
       | The first paragraphs contain the most concise explanation of the
       | differences between rasterization and ray tracing I ever
       | encountered!
        
       | tobr wrote:
       | Very cool, great visual explanations of how raymarching works.
       | 
       | PSA, Germans writing in English: upside down quotes look as out
       | of place as Spanish question marks! They read like two strange
       | misplaced commas to the rest of us.
        
       | smcameron wrote:
       | Reminds me of two other things:
       | 
       | * https://www.a1k0n.net/2011/07/20/donut-math.html *
       | https://www.iquilezles.org/www/articles/distfunctions/distfu...
        
       | podiki wrote:
       | Very cool! Reminds me of the old days of ASCII art, I think I
       | last saw it mostly on warez readmes (some really impressive ones)
       | 
       | Edit: I love the combo of ray marching and fonts too [0], as
       | previously seen on HN [1]
       | 
       | [0] https://www.rykap.com/2020/09/23/distance-fields/
       | 
       | [1] https://news.ycombinator.com/item?id=24569542
        
       | wcarss wrote:
       | Great post! This motivated more learning for me about ray-tracing
       | and ray-marching than I've ever bothered with, despite over a
       | decade of vague interest.
       | 
       | If anyone wants a copy, I ported the diffuse shader code to
       | python 2 and 3 here:
       | https://gist.github.com/wcarss/a6ff897fb9c50ac34875dbd5d8599...
        
       | nickdothutton wrote:
       | Nice work. Reminds me of some of the work of Pete Cooke of Tau
       | Ceti and Academy fame on 8-bit platforms.
        
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       (page generated 2021-03-08 23:01 UTC)