Don't mind me, I'm just playing Doom 2016 raytraced on my Ti-84 Plus CE while you're stuck playing a bad Pacman port in math classes

Back in the dark ages when I was in school, I put several formulas into my TI calculator instead of memorizing them. A classmate tattled to the teacher who replied with, "If he can actually figure out how to do that, I won't stop him."

Graphing calculators can do this but can’t draw a sin graph without taking like a full hour

at this point, 'computer' and 'calculator' are synonyms of each other, just as much as 'compute' and 'calculate' are.

too cool - i struggled to get this type of thing done with opengl

I guess he's the guy who made it possible for Nasa to go on moon with 4Kb of Ram in 1969

Awesome video

Nerdy thing i love about this video: the font you use in your infographics is *Segoe UI!* It's the main stylistic font in most Microsoft products, and has been their logo text since *Windows 8!* It's also used in the Microsoft-published indie darling game *Ori and the Blind Forest!* It's such a clear and official-looking font and as much as people crap on Microsoft (fair) I absolutely love the look of it. Anyway awesome video!!

It's very nice to see someone working for efficient code, even as a hobby. Too much nowadays is just incredibly bloated. Good luck with future endeavors!

This was a real trip down memory lane. I used to love writing ray-tracers using languages and hardware completely unsuitable for them and was very familiar with fixed point math. I never quite cracked global illumination but there was no internet back then, it was all from books. I've always felt that ray tracing is the best way to learn about computer graphics because it's so intuitive - you don't even need to know any matrix math. To do the same thing using OpenGL or DirectX is an absolute nightmare because you have to master matrices, cameras, lights, shader programs, fragments etc. You can literally write a ray tracer in a dozen lines of code provided you have some function to draw pixels. You get so many things for free with RT, for example 3D textures and constructive solid modelling, because you're dealing with surfaces and objects and not millions of flat triangles. And there's a lot you can do to speed it up, which I'm surprised you didn't cover. For example using bounding volumes or adaptive sampling.

The TI-Nspire is WAY more powerful. It can already run doom in full speed and color! With the source code out for Super Mario 64, I bet it could be possible to get it running on there. If not the TI-Nspire, definitely the TI-Nspire II (Which is 2.5 times faster)

“As always, it could always be improved. When writing some of the more complex fixed point functions, I got a little lazy and just used the floating point library instead of writing it myself in assembly.” is one of the most insane sentences i've heard said so casually

I know it's not the focus of the video but blender's raytracing engine, cycles, had a complete overhaul in 3.0 and renders waaay faster, especially on low end devices.

I wasn't expecting another upload for atleast a month!

This is really impressive! I'm currently taking a computer graphics course and have implemented the techniques you mentioned in my own c++ projects (like shadows and ray tracing), but I never would've thought to try rendering using a graphing calculator. Really cool idea and video!

It’s actually quite amazing how well a video about raytracing with calculators can teach you the basics of how shaders and graphics fundamentally work. Following step-by-step the actual process of building the renderer from scratch and seeing how they affect the final image really helps you understand how it works. I’ve been working with unity for almost a year now and have fairly good experience using shaders for my projects and now seeing how one works under the hood (albeit using a very different rendering technique) really gives you a sense of appreciation for these wonderful bits of code.

Great work! It's awesome to see your projects develop! I remember most of the comments on your TI-Basic version were "why didn't you do this in ASM?" :P The transition of moving the window to the calculator screen was so smooth I though you were using a program to do it until I re-watched it!

This video held my interest to the end, a pleasant surprise for what seemed like an absurd premise. It takes me back the early days of computer graphics and my first experiments with POV-ray on a 66MHz '386 when rendering an image took hours and Blender didn't exist.

Thanks for having detailed your experience. These kind of details is probably the most interesting aspect in such video.

As a musician, I was surprised by how much of these terms I've stumbled across in my audio engineering courses. This was a great video, and I learned a lot about how sound and images are related! I was thinking of writing some advanced audio processing algorithms for my Gameboy Advance, and this video definitely helped to see your approaches on optomizing the code.

Banger video! Just as I'm going to sleep, you just uploaded today! Thanks The Science Elf, I'll watch this after I wake up tomorrow morning 😆 Goodnight everyone and take care! 👋

as someone who fiddled around with TI-Basic for a total of 3 weeks I’ll pretend I understand this video

you did a great job explaining this to laymen. I've never done any programming or any kind of 3d rendering beyond making basic shapes in blender, but despite that you made it easy to understand the concepts

Holy smokes, that Blender vs TI-84 side-by-side is beautiful. Nicely done.

I usually watch your videos every time I come home from school, and I love em.

I always knew that interpreters were more computationally expensive than compilers, but I never truly appreciated it until I had to write a compiler. It was a painfully simple one, but a compiler nonetheless. Honestly, we programmers are spoiled in the modern day by how much extra processing capacity we can assume will be available to the program.

Weirdly this, calculator video, of all things, clearly distilled and explained succinctly various key Raytracing terms better than most any other video I've come across. Terms that I've heard for years defined really well. Really cool. I remember programming on my ti83+ back in the late 90s. Good times.

This is a sick example of how good software optimization improves hardware performance. Nice job!

Great job! For sqrt(), it's easy to do using plain ints. Start with an approximate value that's 1 shifted left by half of the bits of your input number, then perform 1, 2 or 3 iterations of Raphson-Newton to get a more precise value, doing ret=(ret+x/ret)/2. You'll have to shift each intermediary result by 12 since you're using fixed point, but that can be way faster than passing by floats!

i've had to write a whole raytracing program (doing about everything you mentioned) on paper for my entrance exams last year. I did fairly well on that one and enjoyed writing it a lot, even though I ultimately failed the exams. I wish I could have tried running it

is it possible to get this program running on modern hardware? the specs i wanted to try this with are office computer specs from 2014, Windows 7 Pro, Intel 3rd gen I5, Intel HD 2500 and how different are the times for displaying images? and is there a performance boost or drop? i want to turn this into a shader for opengl on minecraft java, maybe it will run better then most shaders?

This is such an excellent way to teach about the rendering concepts and process step by step. Thank you!

I might say that it was really good for ray tracing on a TI-84 Calculator. I really enjoyed it.

I did not understand most of the stuff but I appreciate your efforts and am impressed with the results.

thats awesome progress compared to the older program! awesome video

This was fascinating! Super well done overall!

I'd be curious to know how much faster you could make this run on a TI nSpire.

It makes my day when the science elf uploads something

I've been obsessed with the cx calculators since they were announced I love this video

oh my gosh!! i've been watching your stuff for a good while, since i was like 11 years old lol. good to see you're back!

Very cool! I'm quite interested in graphics programming! I've been playing around with opengl recently.

Never thought I'd see a graphics calculator being used for graphics haha

WAIT YOU CAME BACK??? I used to watch all of your videos religiously! Honestly really nice to see a new video.

Great Video! The LUT part made me very happy. Great that you considered that :D

A very basic raytracing algorithm like this sounds really awesome to implement on a modern computer for real time raytracing that isn't RTX, maybe a certain Java game...

This was super cool! I never would’ve suspected such capability out of my calculator, but I suppose looking back on it that makes sense.

Incredible work man, this was really insightful.

Absolutely fantastic, I always wanted to know the power of those small calculators

this is why I want to get into programming. This stuff is so cool

Great video as always!

Props for using Romeo Knight's music!

Not sure how I got recommended this video but wow that is super impressive man!

I think your videos may have inspired some of my teammates in Valorant to also see what they can run on their calculators.

So cool! Gonna try out this fixed float trick =)

Super impressive. I used to code games on my calculators back in the day. This is next level stuff here.

This is a great video! Thank you very much for posting. I learned a lot!

Wow, very impressive results. Have you looked into using SIMD instead of/with fixed points? Like break down the 24 bit interface into 3x8bit.

Laupok on est là !!

Hey dude, loved this video, so cool. I'm a bit older than you (not sure how much, but im almost 40) and back in high school, having a TI loaded with games and stuff was pretty much one of the coolest things you could have. Back then, cell phones were very rare, and the games on them sucked for the most part. You also ran the risk of having your phone confiscated (you weren't supposed to have them in class) but that was rare. Because you needed your TI for Math class though, they were not able to be confiscated, and if you weren't obvious, you could play games in your math class all day. I remember programming in basic and wanting to do ASM, but it was too hard for me at the time (much different environment and times). That said though, TI calcs have a very soft spot in my heart, and I love seeing how far you guys have taken them. If you would have told me back in my high school years that something like this would eventually come out, I wouldn't have believed ya! Again, great video to see, loved it.

it's good to see your back making UKposts videos

have you tried porting this program to your pc to see how fast it runs? I wonder if it could have fast enough frames per second to make a simple demo game

love it! Even though it's ancient tech, there is something about rendering color (or even mono) images using 8/16 bit (or 24 in this case) MCUs

Awesome, a little optimisation goes a long way and this is the next level. ;)

Will this work on my normal TI 84? Can it do different brightness levels by switching pixels on and off fast?

I'm curious how well this'd run on my TI Nspire CX CAS.

Now add a function to render graphs and numbers in 3d space and make all your calculator's interface run in raytraced 3d.

We missed you more than you can imagine. We’re glad you’re back

Would it be possible to make a raytracing engine without a jailbreak (not counting his previous one with TI-Basic) using Python (which is installed by default on the TI-84 Plus CE Python)?

Elle Woods called. She wants her calculator back 💕

Shouldn’t Int32’s smallest number be a negative value, aka the same value as the biggest but negative? Unless you mean unsigned, that way it’d be zero (and not one, anyway)

Just commenting so you get more views! Awesome video man, wish I had the time and strength needed

Nice! Fun vid and really cool concept, keep it up!

Well you know what's next, Raytracing on a Game Boy!

For inverse square root, you can use quake 3's algo, it's a lot faster

Great Video mate ....i always though that hardware is already mature enough and only the software needs to be worked on....and you proved me right😁

This is amazing! Clocked in at 8min and 48secs on my Ti-84 Plus CE-T Python ed, using FASTER for a slight overclock and resetting the entire thing beforehand to get rid of old junk. Looking forward to what you'll do with this project, maybe allow for custom scenes to be added?

When a _calculator_ that's likely thousands of times less powerful as a mid-range (of the time) GPU, but costs the same amount (at the time), you're either getting a really good deal on the GPU or are being oversold the calculator.

I did this with no tricks! The trick was to use C++ instead of the built in! Also I lied about the processor. But no tricks.

An 2nd upload before a year has passed? Has the Elf truly returned to us!?

Good job! These hardware accelerations would definitely make graphics heavy games more accessible to hand-held devices.

Two uploads in less than 1 month time Very impressive Is this going to become a regular thing

ceut qui sont fr et qui vienne de laupok lever la main

Groovy processor! I love the Mac OS 7 cat wallpaper 😆

Cool explanation, I'm subscribed :)

With the scarcity in GPUs nowadays, looks like I will be booting up my games on a TI-84 😂

Qui est là grâce à laupok???

I can't believe you're back!

Gold channel. Can't wait to watch every other video

He can code an entire raytraced engine but still can’t figure out how to upgrade from Blender 2.79.

hi :D where do one start learning to do this? do i have to look up computer graphics, render algorithms or what? aside i assume of knowing c++

This is some impressive results!

This content is amazing! Why can’t I like a video more than once :)

Great stuff.

Videos like this are fascinating ❤ I've no programming, coding, and barely math literate(jk), but I still GET it. I saw one earlier about ray tracing on a zx spectrum with only 15 colors 😮

Please make a sequel, this is one of those gems that have no reason grabbing my attention this much

My man made Enscape for ti calc ! Neat mate :)

Wow! I once wrote a hidden line removal 3D rendered tilting double gaussian curve on a TI-84. It took hours to plot each frame.

this is amazing!! great job!

This is so nerdy. I love it

dev since doing asm z80 on my ti 83/84, did a raytracer, so let's say I'm loving the content!