Move multiple 'copied' objects along a spline

Forums Houdini Indie and Apprentice Move multiple 'copied' objects along a spline

5993 13 4


reelinspirations: Member; 177 posts; Joined: Nov. 2015; Offline

May 25, 2017 1:34 p.m.

Hi,

I have a spline that I've copied a bunch of spheres to, but I want to ‘move’ the sphere's along the spline.
I know how to set up a single object to follow a spline, but have no clue how to make this work.

For those who know Cinema 4D, what I'm trying to do is ‘clone’ a bunch of objects to a spline, then use the ‘offset’ to animate them along the spline.

Thanks!

Jim

Attachments:
move_along_spline.hiplc (62.3 KB)

Reel Inpsirations
Houdini Work in Progress [vimeo.com]


friedasparagus: Member; 402 posts; Joined: June 2014; Offline

May 25, 2017 3:07 p.m.

Hi Jim,

is something like this right?

P.S. The parm that does the moving is the ‘Offset’ in the wrangle SOP

Edited by friedasparagus - May 25, 2017 15:08:39

Attachments:
move_along_spline_try.hiplc (73.9 KB)

Henry Dean


reelinspirations: Member; 177 posts; Joined: Nov. 2015; Offline

May 25, 2017 3:26 p.m.

Wow, thanks so much!

That is exactly what I needed. Houdini rocks, if you know what you're doing LOL!

Edited by reelinspirations - May 25, 2017 15:26:54

Reel Inpsirations
Houdini Work in Progress [vimeo.com]


r_ross: Member; 22 posts; Joined: Dec. 2014; Offline

Feb. 10, 2018 7:47 p.m.

That is pretty awesome but I don't really understand how you did it. Is there a tutorial out there that would cover something like this. I am also from C4D so I'm not sure how this works in Houdini.


druitre: Member; 63 posts; Joined: May 2006; Offline

Feb. 22, 2018 12:25 p.m.

Hi friedasparagus, thanks for your example. I was looking for something like this.

I have a next question you or someone else can maybe help me with: would it be possible to introduce a randomness to the amount each point is offset?

Thanks,
Jasper


sepu: Member; 417 posts; Joined: Feb. 2012; Offline

Feb. 22, 2018 1:15 p.m.

you can use a same @curveu attrb and randomize that and if you want more control use a fit function.


mestela: Member; 1731 posts; Joined: May 2006; Online

Feb. 22, 2018 5:45 p.m.

same but different, using the attribute interpolate sop, plus a slider for randomness.

Attachments:
move_along_spline_attribinterpolate.hiplc (83.6 KB)

http://www.tokeru.com/cgwiki [www.tokeru.com]
https://www.patreon.com/mattestela [www.patreon.com]


druitre: Member; 63 posts; Joined: May 2006; Offline

Feb. 28, 2018 4:26 a.m.

Thanks both, works like a charm!

- Jasper


plazadelmar: Member; 27 posts; Joined: June 2016; Offline

Dec. 12, 2018 8:52 a.m.

mestela
same but different, using the attribute interpolate sop, plus a slider for randomness.

If I take this example and use copy to points to have many splines, Attribute Interpolate brings all objects to 1 spline even though I have many copies. How can duplicate it, keep the points and position of the splines?

Edited by plazadelmar - Dec. 12, 2018 10:00:11

Attachments:
move_along_spline_attribinterpolateCOPY.hipnc (92.2 KB)


tamte: Member; 8507 posts; Joined: July 2007; Online

Dec. 12, 2018 10:57 a.m.

line 9 in your animate_curveu_add_random
change:
@sourceprim = 0;
to
@sourceprim = @primnum;
or
i@sourceprim = @primnum;
to be explicit

Tomas Slancik
FX Supervisor
Method Studios, NY


plazadelmar: Member; 27 posts; Joined: June 2016; Offline

Dec. 12, 2018 11:06 a.m.

tamte
line 9 in your animate_curveu_add_random
change:
@sourceprim = 0;
to
@sourceprim = @primnum;
or
i@sourceprim = @primnum;
to be explicit

Amazing, it works. Thanks.

Edited by plazadelmar - Dec. 12, 2018 14:19:52


plazadelmar: Member; 27 posts; Joined: June 2016; Offline

Dec. 12, 2018 2:19 p.m.

One more noob question. If I would like to each spline to produce random speed for the spheres I could probably solve it with forEach. Unfortunately, I have not been able to create this effect. How could I solve it?

Edited by plazadelmar - Dec. 12, 2018 14:22:39


tamte: Member; 8507 posts; Joined: July 2007; Online

Dec. 12, 2018 2:32 p.m.

plazadelmar
I would like to each spline to produce random speed for the spheres I

line 3, change
t = @Time * ch('speed');
to
t = @Time * ch('speed') * fit01(rand(@primnum), .5, 1);
which will multiply the speed of each sphere by random number between 0.5 and 1 per curve

Edited by tamte - Dec. 12, 2018 14:33:09

Tomas Slancik
FX Supervisor
Method Studios, NY


plazadelmar: Member; 27 posts; Joined: June 2016; Offline

Dec. 12, 2018 3:30 p.m.

tamte
plazadelmar
I would like to each spline to produce random speed for the spheres I
line 3, change
t = @Time * ch('speed');
to
t = @Time * ch('speed') * fit01(rand(@primnum), .5, 1);
which will multiply the speed of each sphere by random number between 0.5 and 1 per curve

Awesome. Thank you

Edited by plazadelmar - Dec. 18, 2018 12:55:10

Quick Links

                    
                        Search links
                        Show recent posts
                        Show unanswered posts