Nice work!

Same here. I run the project in 5.3, every step the same as in the tutorial, but my mesh stays at the starting point and does not follow the spline :(

@@notcrazy I wasn't able to resolve the issue, so I took a different direction.

yep same here

basically the mesh wont repeat, i just get the originale point and mesh and wont spawn any more on the spline lol

probably part of the math of setting the mesh's location along the spline is going wrong, I would guess that it's just spwaning the new meshes on top of the previous ones without setting them to a new position along the spline. but without seeing your blueprint of course I can't be sure

hmmm okay i will check it out and see if i can figure it out thank you tho! @@thegamedevcave

Any luck? I have the same issue.

I forgot to hook in set start and end into the other notes with the white input output arrows/lines

does this work in ue 5.4.2

make the variable of your mesh public

what do u mean ?

in general, I fixed this problem, I had to delete DefaultRoot and then yes, now it is updated both in the editor and in the view port in Blueprint

wait im might be just dumb enough... think il need to set straightly splines instead of trying to impliment the 'created actor' inside the world blocks actor . so in term copy pasta this function and script inside each worldblocks xD edit : doing so works out. now i have to set pool objects so the engine doesn't create new blocks but reload ( objects into it, enemies spawners and all ) pre-existing ones and relocating

might be because the mobility of the actor is set to static, i remember having some people having an issue with that at some point.

sadly, splines aren't means to dynamically change at runtime so you can't animate the spline points

@@thegamedevcave thank you, what about meshes inside blueprint? in your example it will be moving railroad itself, but not "train"

@@alexrybin3798 you might be able to animate some kind of offset varialbe for the meshes, i've never tried if spline meshes can be animated like that. I would assume that also is a problem though since i expect the reason splines can't be animated is that the engine really wants to bake your splinesmesh down to a static mesh. But i've never tested that, so it might work?

hard to say as a general statement , depends on the size and how sharply they will turn , a thin pipe that needs to only have a very weak angle can be rather low poly but wide train tracks that need to make near 90 degree turns, you'll want to have a lot more. Generally i would say if your mesh as about 4/5 loopcuts worth of geometry for every meter of distance it is long (in both directions) you'll probably be fine but it's best to expiriment a bit with it yourself to get a good feel for what you need :)

just hold alt when moving any spline point and it'll create a new one, just like how holding alt when moving an actor makes a copy of it

should be possible but you'll likely have to put all of this into a function with a parameter for which mesh you want it to use instead of directly into your construction script. then you simply put that function in your construction script for it's default mesh and then use that same function in your normal event graph on overlap to set it's new mesh value.

well, at far as moving actors along the spline goes, i do have a video about that too! kzfaq.info/get/bejne/f52mmpCIvajYiI0.html

I am not aware of any of unreal's modeling tools that does this job. maybe i've overlooked that though, so good to look into. At least compared to generates mesh actors, this method doesn't need to be baked, so it's much easier to set it up and come back to it months later and still have it easily editable. But for the most part, on it's own, I'd say there isn't much use in this over a build in splinemesh deformer if unreal has one, this would mostly come in handy for things like train tracks where you have a script that also moves a train over these rails and both the track and the track follow along the same spline

@@thegamedevcave Ty and for quick response

probably using a too high poly mesh or your PC might be a bit underpowered for unreal (it's pretty heavy to run). or both. in any case, you'll want to have enough polygons for the mesh to deform but not go overboard and make it a super high detailed mesh

Im getting pretty bad lag too trying to move any spline points. i was able to place a spline with a repeating mesh using a non bp method but using the bp method its super lagy... using a ryzen7 5800 with a 3070 ti. and 32gb of ram i dont feel i should be lagging.

So i found the video thats showed how to repeat the mesh on the spline without a blueprint. using this method i have no lag unlike your method. is there any major diffrences between this method and your blueprint method? this video here you dont really show how to add a mesh on top of this spline and have it move unlike the first few seconds of your video. im confused See the non bp metthod here: kzfaq.info/get/bejne/gNVzg8xenrXUZYk.html&ab_channel=Axton99 can i use this non bp method to place my spline then animate it? cause this lag its impossible to work with the points.... thanks for the video and help

Yeah it takes some getting used to working with splines in unreal

no this should be in the base unreal engine. I just checked to be sure nothing changed but it's still there in 5.3, i even use it for some assets in my own game, what kind of blueprint are you trying to put it on? it has to be an actor, i dont think you can add these to a component if that's what you're trying to do

​@@thegamedevcave Just checked my project and the BP has the Actor parent class. but I have found the problem, basically for whatever reason I don't understand the "Context Sensitive" button on the action search drop down filters out all spline mesh functions.

@@kovacore what did you do to fix this problem? I am also unable to get the "set forward axis".. I can see it when i untick the "Context sensitive" But then i cant get the nodes to connect

you can just make an int variable and in the for each loop add 1 to each each time, then check if it's equal to 5, if it is, add your different mesh to the static mesh component instead of the normal one and set the int back to 0, you can just make a separate static mesh variable that you use. if you want to manually add in different meshes at arbitrary placements, that isn't going to work all that well with this whole system. but if you use the above method, it will add in the different mesh once every 5 components. twisting should just be a matter of rotating the spline point around, just make sure your mesh has enough geometry to bend probably to avoid pinching and don't make the twist too sharp. It shouldn't have any issues regarding collision.

@@thegamedevcave Wow, wasn't expecting a response that quickly ! Awsome, I'll try that. I guess I'll create a first version and see how it goes on its own before trying variations. UE is a totally different world for me I'll give that a try, thank you very much !

sure , you can do this with any model you like

did you move to spline point? if your spline is too short it'll squish your mesh since it can't cut off any part of the mesh

@@thegamedevcave In the viewport of the spline , I kept only 2 spline points & changed the distance between them to 349 units so they can comfortably fit the 349 length of my static mesh. That did not work as well.. One thing I noticed is unlike your static mesh, when you drag and drop your BP to your viewport , your spline mesh railway track starting position is one of the ends of the spline itself, but for me, when I drag n drop my BP in my viewport, the starting point of my mesh is NOT the starting point of my spline , the centre of my mesh is the starting point of my spline! I think this is why my mesh is so squished up , my mesh is spawning not from the end but right in the middle of the spline point :s How do I make so that my mesh spawns from the starting point of the spline? Below is the image showing the spawning point of the mesh is right at the centre of the mesh on the first point of the spline. postimg.cc/K3G33Q4J

@@ParikshitBhujbal that image looks like something is getting messed up with setting the end position for the mesh. I have to imagine somewhere in all the math nodes something isn't connected up properly. it looks like your roadmeshlength might not be the right value if i had to guess

@@thegamedevcave Hi thegamedevcave, I really appreciate you giving your time to help me with this, I tried other videos for making a spline road but none off them are using the Get Bonding Box node like you, and most off them are using the spline points to find the Location and Tangents for the start and end pos instead of your method, so I really want your method to work because I think its more detailed and dynamic. I checked the roadmeshlength value like you pointed out earlier and it is working properly, it accurately shows me the length of the various mesh I put in the Road Mesh variable which means that your Bounding Box node is working as intended. I am using the exact same nodes as you in the exact same way , the only difference is that when i expand the Get Bounding box it is now showing me a third node , a Boolean called Return value is valid whereas in your video it only shows two nodes. I tried using other meshes but they all have the same issue, the Mesh wont start at the starting point of the spline, the centre of the Mesh is always the starting point of the spline and this causes the Mesh to get deformed and squished up. The Mesh just seems to superimpose itself at the start point of the spline, which is why I can't even select the start and end points of the static mesh. If you look at the comments section there are 2 more viewers facing the same issue as me :(

@@thegamedevcave Hey its working now as intended , I re wrote the nodes at the get location and tangent part and now its working beautifully! :) And Thank you once again for helping me out , keep up the good work :)

this already does rotation too, the mesh will rotate and twist along the spline when you rotate the spline points

@@thegamedevcave it rotates around the z axis yes, but I meant to rotate around x Or y axis. Of course this in the case of a train trails not possible :D but my inquiry is to create a sort of twisted form. Thanks for the reply anyway and for your effort inadvance 🙏

the nodes added around 6:20 do that already, it takes the tangent of the spline at any point (which is 3 dimensional) and applies it to the mesh.

I see, My bad @@thegamedevcave

My guess is either the length math of the mesh is wrong or you might have to make changes to the mesh where the pivot is located, hope my comment gave you some ideas.

it will compress when there isn't enough space. so if you only have a really short spline with a long mesh, it'll compress, it sometimes also compresses the last little bit, between the last 2 points for the same reason.

I stretched the Spline length and it didn't work, neither did changing X to Y or to Z.@@thegamedevcave

@@nealcaffrey8890 then you should go back over the blueprint and check for issues, I’m pretty sure it’s not a version issue

I'm a beginner and English is not my first language. It's a bit difficult for me to follow your thoughts or to understand the meaning of each function, so I'd appreciate it if you could organize the logic to achieve this effect and the functions corresponding to each step into a logic diagram.@@thegamedevcave

@@thegamedevcave OK,I'll check my blueprint again,thx

i haven't tried it but I dont think that'll work, I doubt the sequencer updates construction script, you're better off just making your object from a skeletal mesh and animating that I think.

@@thegamedevcave Thanks for reply. I really need long object following path animation in sequencer wonder UE5 have this feature. if I import from Alembic would be pain in the A XD Thanks anyway

for a lot of use cases this is also no longer needed. unreal now has built in support for putting things along splines in their modeling mode. which is less of a headache than making it yourself (unless you have a real good reason to do it yourself like making a train track that also has a train cart going over it by following the same spline or something)

I'm not 100% sure but I am pretty sure it would be a draw call for each segment yeah. Since it can't use instanced static meshes due to them all being deformed in different ways, hence the need for more draw calls.

hey, instead of being rude out of frustration, asking for help might get you better results. you're likely using a different axis on yoru mesh, or somewhere things are getting multiplied in scale weirdly.

@@thegamedevcave sorry, my bad, got frustrated. I apologize. But I’m completely lost to this. Anything you think I could do?

@@camerontraer3136 how does it invert the mesh? upside down? or like inside out? either way it sounds liek something is going wrong with some of the multiplication math to set positions and rotation and such.

Go look up another one then, if you want help don’t be a dick, if you’re gonna be a dick, don’t bother coming here 🤷🏻‍♂️