LEGO Draw Units vs Trans Slider Method. Whats The Difference?
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- เผยแพร่เมื่อ 10 ก.พ. 2025
- Welcome to Bricksculpt and thank you for watching. This video is a response to many comments I have received about interchanging the increments of LDU with the Trans Slider Method. This will show what is similar about the two techniques but also why they are different. Please let me know if there is anything you would like to add or if you have any questions. Also my Discord server linked below is a great place to see other peoples ideas and share techniques. Thanks for your help and support!
/ discord
#lego #afol #legoaddict
They achieve two different things, which is actually pretty useful. The LDUs standardize the increments, and the sliders could be used to compensate for imperfect calculations & rounded measurements that are actually irrational… especially if a rational length is connecting to an irrational one (like connecting a wall with rational length to a base with an irrational hypoteneuse)
Yes absolutely and I totally agree!
Whenever my wife argues I'm too much of a nerd for spending time refining medical science, I pull out this video. You are my hero!
Lol that's awesome thank you so much!
Sad that you didn't talk about the principal problem with slider: you need something to keep them at precise position, also we can't consider their increment as they have a continum of diferent position between 0 and 1 ldu.
Yeah that's a good point.
Sliding doesn't necessarily create irrational numbers. Irrational numbers are numbers that cannot be represented as a simple fraction. You can slide to 1/2, 1/3, 1/4, etc of a brick easily and those are rational. You can also slide to 1/pi, 1/e, 1/sqrt(2), etc and those would be irrational. Because of the LDUs in lego, you can only place bricks on studs in fractions that are some multiple of 1/20 of a brick. You cannot place a brick at 1/sqrt(2) distance away from anything when firmly on a stud. Also, keep in mind that numbers like 0.333... are not irrational. 0.333... is identical to 1/3 which is by definition rational because it is a simple fraction. Yes, that means 0.999... is identical to 1.0. No, repeating digits don't "grow" in the same way that a human would write them down on a piece of paper; they simply exist instantly and in totality.
Thanks for pointing that out. And for clarifying the terminology.
darn infinitely recursive fraction conversions
Sliders are not irrational sizes, they are continous. If you set them to stick put 1 LDU they will still be rational numbers. the problem with attachment isn’t that they are irrational. The problem is that you offset it by 1 LDU, meaning you need some way to get the offset back, so in that sense it’s exactly like the regular method of creating 1 LDU gaps.
You can also achieve the corner in the same way using sliders, it would just be a lot bulkier.
The main problem with sliders is… they slide.
If you want to build a wall, I think the main problem is that they are transparent.
Must admit, I came into this video with no knowledge and I leave it with just as much.
I would like to note, that in larger applications, it could be possible to use the Trans Slider Method to fill out the corner, but it comes at a great expense of design footprint. It would require 1 brick of height for an X-axis component and another brick of height for a Y-axis component, and then building out a facade on top and to the side. It certainly wouldn't have much structural stability or sufficient clutch power without additional layers and many additional pieces, but stacking Trans Slider bricks does add another degree of freedom with position.
Love your stuff mate. Keep it up!
Thank You so much!
I think you kinda forgot to mention something, maybe because it's too obvious: sliders slide, which can be a problem if you want your build to be stable and solid.
that could probably be remedied with parts with hollow studs and bar pieces, or the inkwell pieces and cut pneumatic hose
Very true lol
yay trans!
This video gives off the same feeling of blinking in math class
I should dig out my Technics and make LEGO calipers that give measurements in LDU's.
The backlash in normal Technic gear trains is usually much more than an LDU, so it would require clever use of levers.
I like that lol
Trans sliders have an entire spectrum of adjustability
I noticed that my newer translucent clear bricks have a slight purplish tint compared to my older ones.
never seen hat but good to know!
I believe what you are describing is the result of the plastic formula change lego made to try to make the bricks more environmentally sustainable.
@@troycongdonMy first thought was UV protection for the more sustainable formulation. If that is true, the bricks look purplish because they reflect short wavelengths, aka. ultraviolet and a bit of violet. However, they wouldn't allow violet to pass through, so they wouldn't cast a purplish shadow. The shadow would be slightly yellow.
On the other hand, if they cast a purplish shadow, then my theory is totally wrong.
Translucent parts made before 2018 are made of PC (Poly Carbonate) and there has been a gradual change to a different plastic MABS (the real name is very long). MABS makes the parts slightly more blue/purple and can make them look a bit frosted (lightsaber blades show the frosted effect)
It'd be interesting to see an obelisk that uses the LDU increments on the outside, but also had hidden transparent pieces on the insidewhich could be revealed by pulling the 4 corners in opposite directions. The sliding property the transparent pieces may only be needed at the top, middle, and bottom, too many and it would suck to try and open.
That being said, I doubt having a structure that uses LDU increments on the outside would be very convenient to try and add a dynamic feature to. I dont even think there would enough room to split the obelisk into 4 pieces, let alone a way to make a core that is both dynamic and structurally sound (not even mentioning the amount of odd pieces needed to make any of it look visually pleasing)
Thank you for the fun and creative videos, it brings me lot of joy to see someone exploring the art of lego
That would be cool. Thanks!
so what about the brick with axle hole, axle with stud, that i mentioned in some previous video's comments? the brick with axle hole stays on grid, while axle positions inside of the brick is infinite - you only have to be wary of the axles colliding in that corner example (have to, for example, place bricks with axle holes on top of each other)
If I understand the technique you are referring to correctly I would say that yes it stays in grid but would be unable to make a proper corner. Just like the slider it makes positioning the brick infinitely adjustable but does not make actual solid length pieces that can fill out corners. This is similar to how the goblets work which is what the neck bracket is really a better example of LDU increments.
Can you do a video on the lego train track and the angles that you can achieve with the curved pieces? Maybe focus more on the maths and how you can go about creating "legal" train circuits, but it would be cool if someone could find a way to use to the curve track pieces to achieve angles and things which can't be done using regular pieces.
I need to buy some. Believe it or not I have never owned LEGO trains.
Discrete vs continuous
I would say another problem is lack of precision. With the first method you can make say exactly 7 LDU, with sliders you can go, eh close enough. Also in lot of applications sliders might, well, slide.
Dear Chris, I'm sorry to say this but I have made a firm decision to no longer watch Lego videos, in order to help myself overcome the desire to buy more Lego than I already have.
I'm just explaining why I have to unsubscribe. I'm unsubscribing from all Lego YT channels and even from fake Lego channels also, although I hadn't ever bought any of that. I wish you all the best with your Lego adventure and videos. I'm still grateful for the enjoyment I experienced from watching Lego videos!
In your case, I leave myself the space to return when I feel the need for advice on tips and tricks. After wavering I decided to stick to my decision, because I've told other Lego TH-camrs that "I'm unsubscribing from *all* Lego channels", so I don't want to go back on what I said.
Thank you again for your stimulating Lego videos!
Not a problem I'm glad you like the videos!
You can make a perfect corner with trans sliders if you add a snot brick on top of the first slider and a slider on the snot stud and a tile on that 2nd slider, then you can adjust in both directions. 😉
I would have to experiment not sure I totally follow.
@bricksculpt I'll design it in studio tomorrow and send you the file or a render, as you prefer.
Cool thanks!
6:36 windmill
U could use sliders as a way to halfass an attachment to a jumper when building short length 45° angles. That could be useful but there r plenty of other ways to accomplish that same feat so I don't know why u might need that technique. But now im gonna try to find a reason😂
Yeah it's useful but limited
Holy shit... Lego is crazy
I agree
They're turning the sliders trans
The LDU is also stronger when ofsetting plates in terms of height bc slideres could slide down under pressure
Yes true
I don't really think they're comparable as one is fixed and the other is not. But at 4:25, I am a bit confused. Couldn't you just add a plate on the side with snots on top of the sliders to create a corner?
And to prevent irrational brick placement couldn't you create a measuring tool with ldu, line it up, then hope to God it doesn't move?
Yes, you could add a snot piece and a plate to each side, but the outer plates would need to slide in order to meet up properly at the corner. Even if you were able to make them slide this would make one lined up corner but creating two three or four would be very difficult. Because the lengths of the sides would all be unchanged just repositioned by sliding.
What’s the thickness of a cape? Is it less than an LDU? Could capes be used as washers to create spacings of different sizes?
I think it's 2 ldu
couldnt you put two 1x2 sliders and put a snot brick on top of it? or am i missing something. mostly for the corner example!
that does achieve a smooth corner but when you consider using the same thing on the other side of the wall it wouldn't line up (without specific measurements)
I think to achieve the corner it would have to also slide sideways or use LDU increments.
And here I thought sliders were just a White Castle thing. 🤔
Not any more lol
You forgot to mention that sliders slide so they're not as stable as the other method
True
if you place sliders on top of each other, then would't you be able to achieve that corner? sure it would be 40LDU tall now
Seems counterproductive and would leave gaps if it needs more than 1 corner.
@bricksculpt it wouldn't leave gaps
What about the cis sliders tho?
I respect needing both types. That being said, the corner demonstration seemed a little useless to me. Like obviously if you have an easy LDU distance that a standard bracket can cover you'd just use that. The sliders seem more useful for when you'd have to otherwise stack up four studs worth of jumpers, brackets, and chalices that wouldn't be able to do the corner either. Still a nice video, but I don't think it helped prove your point.
The point was that the comments all said they are the same. So I wanted to show that LDU has different uses.
Sounds like you’re having to explain the difference between building techniques and applications.
There’s always a time when different ones are applicable.
There’s also the technic axle with studs that can go into a technic brick with cross hole for adjusting the width, but keeping the studs on grid. Or various clip bar attachments.
Your technique demonstrates fixed positions. Not infinitely adjustable ones.
sorry, but increments of 1/20 aren't irrational. they are rational non-integers.
WHAT IS AN LDU?!?!?!?
th-cam.com/video/opRelue2ypU/w-d-xo.html