Kangaroo " Display Pipeline " Error

Replies to This Discussion

Permalink Reply by Daniel Piker on January 13, 2011 at 9:04am

Hi Jeg,

 

Sorry I've just seen this discussion. Can I ask - do the demo files with Kangaroo work for you ?

 

I think there may be some issues when simulations explode (if stiffness values are too high for the chosen timestep) and send particles way outside the normal view area, causing problems for grasshopper to display.

Permalink Reply by Jeg on January 13, 2011 at 9:40am

hi Daniel,

 

Thanks for the prompt reply.

 

The WALKER and CRADLE examples open and run perfectly.

 

If I open CONFORMALIZE, I get an error message pop-up :

 

Plugin version: 0.8.0004

The archive contains an unrecognized object: Face Polylines {4098ecba-269a-1ced-9ce4-86836dae2101}

This object cannot be deserialized

The archive contains an unrecognized object: Mesh edges {4098ecba-299a-1ced-9ce4-86835dae21c9}

This object cannot be deserialized

Object list read

And the simulation will not run afterwards.

 

Is this because the face polylines and mesh edges that need to be in the Rhino example file are missing? (the Rhino file contains 5 points, and no other geometry).

 

I get a similar error if I open TENSEGMEM :

Plugin version: 0.8.0004

The archive contains an unrecognized object: Mesh edges {4098ecba-299a-1ced-9ce4-86835dae21c9}

This object cannot be deserialized

Object list read

 

If I open one of the examples which is just a GHX file (such as CATENARY), it loads without errors, and a series of Grasshopper generated objects appear on screen - but the simulation will not run. The grasshopper definition says it is "unable to load a series of points". Please see attached JPEGs.

 

sorry for the headache !!

 

thanks,

Jeg

Attachments:

• rhino_CATENARY.jpg, 846 KB
• error_CATENARY_1.jpg, 390 KB
• error_CATENARY_2.jpg, 170 KB

Permalink Reply by Daniel Piker on January 13, 2011 at 10:24am

Hi Jeg,

 

Most of these errors sound like they come from a missing WeaverBird

 

http://www.giuliopiacentino.com/weaverbird/

 

Do you have the latest version of that installed ?

Permalink Reply by Jeg on January 13, 2011 at 10:57am

 

ah, no I didn't have that installed!

 

I've installed it, and now CONFORMALIZE and TENSEGMEM work correctly. Sorry for the confusion.

 

I still cannot get CATENARY running though. Same problem as before -- it creates a MeshPlane and 4 corner Points in Rhino, but the Pt parameter in the top left of the Grasshopper definition is orange coloured and says "unable to load a series of points" - so the simulation will not run. See the previously sent screenshots.

 

thanks for your help,

Jeg

 

Permalink Reply by Daniel Piker on January 13, 2011 at 11:07am

Can you try with this file ?

 

Attachments:

• Catenary.ghx, 104 KB

Permalink Reply by Jeg on January 14, 2011 at 2:38am

The new CATENARY file works perfectly - thank you Daniel.

 

I wanted to get Grasshopper running, so that I can do some tests ahead of the 'Generative Design for Robotic Manufacture' workshop you and Gregory Epps are holding in February. I will see you then!

 

thanks,

Jeg

Permalink Reply by Kris Hammerberg on June 4, 2012 at 1:49am

Hi Daniel,

I'm going to piggyback on this thread as I'm having a similar problem.I don't think my stiffness values are too high, but I am having issues with the display pipeline as well.

The GeometryOut output is giving me only 'invalid curves'. Although I can use the particles to interpolate new curves as a kind of work around, these don't preserve my data tree structure.

Rhino 4.0 SR8

Grasshopper 0.8.0066

Kangaroo 0.080

Thanks!

Attachments:

• tribend003.gh, 41 KB

Permalink Reply by Daniel Piker on June 4, 2012 at 4:09am

Try feeding your curves through a 'Line' parameter before going into the geometry input - that way they get converted and it works.

Also - you can always feed a data tree of points into the geometry input, and they will come out of GeometryOut with their tree structure intact (unlike ParticlesOut, which flattens and removes duplicates)

Permalink Reply by Kris Hammerberg on June 5, 2012 at 1:55am

Thanks Daniel!

That did the trick. I suppose "Line-like" != "Line". ;)

I'm loving the kanagroo plugin! Really great work.