Ray tracing in Excel

https://www.pcgamer.com/the-latest-thing-to-support-ray-tracing-is-excel-apparently/

by Impossible • 7 years ago

55 16 7 years ago

mirimir• 7 years ago

What a trip.

I've never done anything that visually elaborate. But I have created data visualizations, using conditionally colored cells in large arrays.

bloogsy• 7 years ago

Very impressive, I wonder what PC spec is needed to crunch that much data in excel?

leibnitz27• 7 years ago

I feel I should link a function mode excel ray tracer a friend wrote in 2004.

https://github.com/simon-frankau/excel-ray-tracer

BurnGpuBurn• 7 years ago

I really really hate websites that hijack my back button. Come on pc-gamer, do you really think that making me click two extra times on the back button to return where I came from is going to make me spend more time on your site?

Crazy excel project though, well done.

airstrike• 7 years ago

Should probably change the URL to https://www.reddit.com/r/gamedev/comments/ctf9f7/raytracing_...

melling• 7 years ago

I added that to my list of ray tracing links:

https://github.com/melling/ComputerGraphics/blob/master/ray_...

ggambetta• 7 years ago

I have a couple of contributions to your list: https://gabrielgambetta.com/tiny-raytracer.html and https://gabrielgambetta.com/computer-graphics-from-scratch/r...

sipos• 7 years ago

The question is, why do this?

Is it for fun? If so, great. Not my cup of tea personally, but I can imagine how it could be someone's.

If not for fun, what is the point? It presumably isn't to create a usable ray-tracing system. Perhaps a challenge to improve the author's Excel skills? If so, I suggest they move on to a proper programming language and visualisation system.

There seems to be this obsession, among some people, with using Excel for all sorts of inappropriate things, and I have a sinking feeling that this might be related to that. A system for generating contracts using Excel formulas, in Excel, instead of using mail merge, or something else, with Word or something else designed to format prose text, is a horrible example I have come across at work.

NikolaeVarius• 7 years ago

Because you can

astrea• 7 years ago

You're overthinking this

ihuman2• 7 years ago

I see what the author is doing as part of the demoscene. Many people enjoy programming in limited environments, learning how to optimize, and pushing it to the limit. No one is actually going to use this in a product; its just art.

https://en.wikipedia.org/wiki/Demoscene

pixelpoet2• 7 years ago

Not all constrained programming is demoscene related; IMO demoscene is chiefly a social phenomenon, about competition at gatherings.

onion2k• 7 years ago

NVidia are bringing out a hardware spreadsheet accelerator card this Fall (mainly for Excel but it'll work with any spreadsheet app). This is one of the example sheets to show off how fast it is.

pixelpoet2• 7 years ago

I feel like nobody understands what Turing completeness really means anymore, i.e. why this is kinda amusing but also not really remarkable.

Back in the day people did ray tracing by hand on calculators, in PostScript (yes, the document description language used by printers), ... ray tracing is really simple, a basic exercise in vector maths, so we should expect to see it everywhere.

Ray tracing in Excel

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