Guiding shortest paths - Houdini Tutorial

Рет қаралды 30,470

Күн бұрын

How to guide shortest paths through a mesh with noise and distance to surface.
PATREON: / konstantinmagnus
0:00 Introduction
0:47 Mesh Preparation
1:41 Fill with Tetrahedra
2:56 Starts and Endings
4:56 Shortest paths
5:46 Smoothing paths
7:26 Inserting a hole
8:55 Noisy paths
10:46 Distance to surface
13:01 Adding thickness
15:43 Meshing
17:45 Discussion
Houdini File: procegen.konstantinmagnus.de/...
Curve-based UV Unrapping Shader: forums.odforce.net/topic/4321...
Curve-based UV Unrapping (VEX wrangle): forums.odforce.net/topic/4321...

Пікірлер: 55

@alainhanni4874 Жыл бұрын

This is fantastic! Thank you so much for such a detailed tutorial Konstantin!

@jyunpeili6454 2 жыл бұрын

OMG your channel is like, magic. I can understand every step and I can flow.Thank you!

@JohnLarryGroff 2 жыл бұрын

awesome! Thank you for making such a brilliant and succinct tutorial.

@lawron2407 2 жыл бұрын

Excellent tut , thank you for sharing the knowledge.

@patrickl9930 2 жыл бұрын

Fantastic tut. I've been knee-deep in Find Shortest Path stuff for the last week and this was a fresh new approach that has taught me a lot!

@KonstantinMagnus 2 жыл бұрын

Thank you, there is still probably a lot more to discover with this node.

@motiondude 2 жыл бұрын

Awesome tutorial, thanks for sharing!!

@huyskn Жыл бұрын

This is amazing, thank you for the tutorial!

@Lunzium 2 жыл бұрын

Brilliant tutorial mate

@stinosan Жыл бұрын

Outstanding tutorial, Thank you sir!

@sewkim80 2 жыл бұрын

super good tutorial! Thanks for this!

@raulestrada6866 Жыл бұрын

Amazing. Thank you so much for this video. Really made a lot of things click for me.

@OrganicaShadows Жыл бұрын

Golden information!! Thanks!

@zotake Жыл бұрын

Awesome! Thanks for sharing it.

@madmodder 2 жыл бұрын

Man, I learned so much from this video. Awesome stuff.

@KonstantinMagnus 2 жыл бұрын

Thank you Chris! You might also enjoy the more boring looking stuff on my channel then.

@ondudengrund Жыл бұрын

Wow, great tutorial and amazing look it gives! : )

@wewantmoreparty 2 жыл бұрын

Kick ass tutorial. Thanks :)

@marcolondero Жыл бұрын

Impressive, thank you

@Gooldoon 2 жыл бұрын

thank you for the amazing tutorial, if you put resample before fuse and polypath you will have the original curveu and you don't need to bypass polypath.

@AntonChervov 2 жыл бұрын

Thank you for the lesson! It was cool)

@alenlenia 2 жыл бұрын

awesome, subscribed!

@eggZ663 2 жыл бұрын

Not what I was looking for, but watched the whole thing anyway cos it was so cool XD

@rikardo2041 2 жыл бұрын

Good job!

@aboldmule 2 жыл бұрын

Thanks

@graphic-nations 2 жыл бұрын

Amazing

@hanbanglao8995 Жыл бұрын

very nice

@correctopinion4708 7 ай бұрын

labs polyreduce node is great if you just want to do just that instead of the remesh node!

@Damagesan123 2 жыл бұрын

Спасибо!

@KonstantinMagnus 2 жыл бұрын

не́ за что!

@SereneBobcat 2 жыл бұрын

This was amazing, thank you very much for this. One question I would ask about Shortest Path is how can you animate the individual branch structures to move like branches or tentacles?

@KonstantinMagnus 2 жыл бұрын

Hi Miles, you could look into Vellum hair simulations or KineFX for that.

@flonkplonk1649 2 ай бұрын

it´s easy to animate with the carve node

@samuelshasa Жыл бұрын

why do I get a dotted line when I try to connect the 'Line' to the 'Distance from geometry' node?

@kkeerr Жыл бұрын

Hey Konstantin! great video! I have a question regarding meshing - I want to have the animation grow from the start to the end points, and ideally I would like to do this with a carve node after the fused lines, but this is where I run into a problem. I want to avoid using the VDB meshing setup you showed in the video because I want the paths to move and don't want to deal with a constantly changing prim count, so I am left with either the sweep node or polywire (maybe there is another node?). The problem is when I use the carve with a polypath and sweep node for example, the animation does not start at the root group, but rather, the start of the line. If I disable the polypath, the setup optically looks correct, but the sweep node stacks a ton of geometry on top of each other, and I want to avoid this as well. Esentially, how can I have an animated mesh that grows along the lines? Sorry for the long comment, I hope I am making sense :) Thanks again for the great video!

@KonstantinMagnus Жыл бұрын

Hi Kyle, I would probably create the entire mesh, add a surface distance attribute starting from the root and reveal the mesh along the distance. That way you have consistent primitive numbers and a consistent topology.

@kkeerr Жыл бұрын

@@KonstantinMagnus gotcha, how would I get the surface distance attribute to actually effect the scale of the mesh? Is there a SOP node? Or am I just tweaking P values in a wrangle? Thank you for the help on this by the way, I really appreciate it :)

@KonstantinMagnus Жыл бұрын

@@kkeerr I don't think there is a SOP node for that. This probably needs a custom procedure.

@kkeerr Жыл бұрын

@@KonstantinMagnus gotcha, thank you for the help!

@nadil6556 3 ай бұрын

Interesting script! Beginner here, how can I show it growing? As I click on the play button down below on houdini it seems static. What should I do ?

@philippaps44 2 жыл бұрын

Is this node using all threads? It's a bit slow for more complex problems. This should run on the gpu ideally. Do you think that is possible?

@KonstantinMagnus 2 жыл бұрын

Hi Philip, it seems possible in OpenCL. In many cases I'd rather optimize the mesh or network in advance, though.

@anincision 2 жыл бұрын

Thanks for the tutorial! I have an issue though. When I use the Group Expression and enter v@P.y

@KonstantinMagnus 2 жыл бұрын

Hi Ashly, make sure to type the number one instead of the letter "I". It's 1e-2 You can also just enter: 0.01

@anincision 2 жыл бұрын

@@KonstantinMagnus Thanks you!

@anincision 2 жыл бұрын

@@KonstantinMagnus soooo, that seems to do the trick but I have two other weird issues, haha. First, when I add the tet embed node I can no longer see the wireframe of my mesh and second, when I add the find shortest path node I can not see the names of the group expression in the drop down. Any ideas why? Thanks!

@tweetbleat487 2 жыл бұрын

Having an issue with groupexpression node. Using houdini 19. Getting an error when entering: rand(@elemnum), chi('rand')) < 0.3 Error Invalid source /obj/testgeometry_templatehead1/groupexpression1/attribvop1 Error: Error in VOP 'snippet1'. Warning: Errors or warnings encountered during VEX compile: /obj/testgeometry_templatehead1/groupexpression1/attribvop1/snippet1: Syntax error, unexpected ',', expecting ';'. (2,44). Error: Vex error: Unable to load shader 'op:/obj/testgeometry_templatehead1/groupexpression1/attribvop1'. Thanks for any help.

@KonstantinMagnus 2 жыл бұрын

Mind the bracketing: rand(@elemnum, chi('seed')) < 0.3