[Plugin] SketchyFFD (Classic)[Plugin] SketchyFFD (Classic)UPDATE April 2021
Hi Everyone. I am happy to announce that mind.sight.studios is going to be taking over development of SketchyFFD effective immediately. Please see this thread by Dale here for more information: viewtopic.php?f=323&t=73658 And I'd like to thank TIG for helping keep SketchyFFD updated the last few years. Chris [Original Post below] [NOTE: These instructions are out of date. Please see this thread for updates] viewtopic.php?f=323&t=73658 Instructions: (somewhat out of date. see updates for changes) -Create a group with all the geometry you wish to deform. This group should contain just faces and/or lines. -Right click the group and select one of the options in the FFD submenu. Either 2x2 or 3x3 or NxN FFD. Depending on the size of the model it could take a while (seconds I hope). At the end you should see a new group containing nothing but control points -Open the control point group and move the control points as you wish. The object should deform as you move the points. NOTE: it can take a long time for complex models. Look at the status bar in the lower left to see the status of the deformation. Bugs and limitations: -BUG. If you start a FFD and the control points don't match the object you need to explode and regroup the object. Then try the FFD again. -Only one FFD at a time. The script uses a few globals for speed. -Only works on geometry in a group and only one layer deep. -Sometimes hidden edges don't move right. Dont know why. Might be a bug in Sketchup. Update Feb 12. New version: -Support for NxN deforms. -Mesh automatically when you move control points. -Added status text progress when it is weighing and deforming the mesh. Update Mar 21. -Moved all FFD right click menu items to a sub menu. -Fixed a bug that forced you to have a least 2 control point in each direction. You can now have do 2D grids. IE. 1x4x3. -Added an option to create a NxN 2d patch. A grid with a control point at each intersection. Updated May 9 2008 -Added ability to lock edges in the mesh so they don't move during FFD. Select edges then right click->FFD->Lock edges. -Added an option to subdivide the mesh when doing a NxN deformation. Updated Aug 24 2009 -Optimized the initial weighting to be about 3x faster. Idea by Stefan. Updated 20110810 by TIG -Code is now inside a module, all $ variables now @@ or @ types, the flaky observer code is fixed. Updated 20130203 by TIG - Recently reported NxN issues with NaN [0.0/0.0] & Infinity [1.0/0.0] fixed, which occurred when selected group was 2d & NxN height=1 and the NxN dialog now remembers the last used values that session for the NxN lattice [width, depth, height, subdivide]... Last edited by CPhillips on Thu Apr 29, 2021 10:53 pm, edited 28 times in total.
Re: SketchyFFD (Free Form Deformation)Wow Chris,
Thank you for sharing this ruby. That is a great contribution! [EDIT]: the ruby doesn't seem to work on my PC. updating the FF seems broken. I must be doing something wrong....(I tried it on a sphere) Re: SketchyFFD (Free Form Deformation)cheers chris, just had a really quick go with it and it seems to work fine for me. Thanks for all the work youve already put into this.
Re: SketchyFFD (Free Form Deformation)Fantastic script Chris!!!
Hope that somebody pick it up and help with the UI. It works very fast!! To show interactively the deformation of the group in wireframe mode (like in Fredo6´s Shear) would be a good feature... perhaps will go more slow.. but will be a time saver because you don´t have to close the group, make a right click and select Update FFD and then wait to see if is the deformation you wanted and then make all the process again to fix it. This is other ruby that looks like a SU7 feature ![]() Thank You!!!!!! Daniel S Re: SketchyFFD (Free Form Deformation)impressive task
![]() Works fine except the control points stay on the screen after deformation ![]() Is beautiful that please without concept!
My Little site :)
Re: SketchyFFD (Free Form Deformation)
That is the new group created by the FFD. You can simply delete or hide it when done with it. This is great! Thanks for this script.
Re: SketchyFFD (Free Form Deformation)Here is a quickie test. I drew a circle with 24 segments and copy/push/pull. Then I ran the script and moved the points.
This is one more step towards organics indeed. ![]()
Re: SketchyFFD (Free Form Deformation)
THX: very simple indeed ! ![]() Is beautiful that please without concept!
My Little site :)
Re: SketchyFFD (Free Form Deformation)It looks great in it's current form, but I get this error in the console... Maybe I'm doing something wrong...
Error: #<NoMethodError: undefined method `definition' for #<Sketchup::Group:0xbec0960>> C:/Program Files/Google/Google SketchUp 6/Plugins/SketchyFFD.rb:224:in `analizeLattice' C:/Program Files/Google/Google SketchUp 6/Plugins/SketchyFFD.rb:60:in `updateFFD' C:/Program Files/Google/Google SketchUp 6/Plugins/SketchyFFD.rb:13 C:/Program Files/Google/Google SketchUp 6/Plugins/SketchyFFD.rb:13:in `call' Re: SketchyFFD (Free Form Deformation)Thanks Chris, this could really be a useful Ruby for SketchUp.
I hope someone picks it up (as you say) and copper fastens it. Even if they don't I imagine you will in your own good time finalise the Script ![]() Mike
Re: SketchyFFD (Free Form Deformation)
Ooops! I fixed it and updated the script in the original post. Kwistenbiebel this is probably the same bug you were seeing. Chris
Re: SketchyFFD (Free Form Deformation)
Can you open the ruby console and see if it is printing any errors? Chris
Re: SketchyFFD (Free Form Deformation)...exactly the same here. I see no errors in the ruby panel though.
Re: SketchyFFD (Free Form Deformation)
Wow. I tried it on 2 different machines and it works. Maybe you are using a Mac? Altho I don't see why that would make any difference..
Re: SketchyFFD (Free Form Deformation)Does the plugin in any means uses web based 'action script' or 'javascript' as I had trouble before with corrupt Iexplorer settings?
(I refer to web panel based plugins like Skindigo that failed in the past on my pc due to 'script blockers' ) Re: SketchyFFD (Free Form Deformation)It is working fine on my home machine as well as my work machine. Both pc on xp. One new, the other 8 years old.
![]()
Re: SketchyFFD (Free Form Deformation)
No other scripts at all. Just pure ruby. Hrmm. Very strange. Try doing a 2x2 FFD on a simple box. With the ruby console open in case of errors.
Re: SketchyFFD (Free Form Deformation)Very cool script. Thank you.
I do seem to being doing something wrong with it though. (Leave it to me to break it. ![]() I drew a sphere centered on the blue axis and above the ground plane. After moving a single point marked at the top and updating, the egg moved off to where it is now. What did I do wrong? Etaoin Shrdlu
% (THERE'S NO PLACE LIKE) G28 X0.0 Y0.0 Z0.0 M30 %
Re: SketchyFFD (Free Form Deformation)
It works great now! thanks for the fix! Re: SketchyFFD (Free Form Deformation)
It looks like you did a "Update FFD" without first closing the control point group. Chris
Re: SketchyFFD (Free Form Deformation)Yup. That's what I did alright.
![]() Thanks for the help. Dave Etaoin Shrdlu
% (THERE'S NO PLACE LIKE) G28 X0.0 Y0.0 Z0.0 M30 %
Re: SketchyFFD (Free Form Deformation)Coen's post makes me ask, is there anyway to make this work on a component instead of or in addition to a group?
Etaoin Shrdlu
% (THERE'S NO PLACE LIKE) G28 X0.0 Y0.0 Z0.0 M30 %
Re: SketchyFFD (Free Form Deformation)Where's the "dope slap" smilie?
![]() ![]() I was doing it in reverse, trying to make a group of a components. Thanks Coen. I gotta think inside the box. ![]() Etaoin Shrdlu
% (THERE'S NO PLACE LIKE) G28 X0.0 Y0.0 Z0.0 M30 %
Re: SketchyFFD (Free Form Deformation)
As it is currently written it creates the construction points at fixed points and then weights the model based on that initial position. I am actually surprised that coping the construction points works at all. ![]() I think what you are asking for is: Take this mesh and start FFD with this group of arbitrary positioned control points. That should be possible and probably not to difficult. But you would have to be careful. When you start a FFD it creates a table of weights for each construction point with 3 floats per vertex in the group to deform. So if you have a mesh with 1000 verts and a 3x3 set of control points: 3x3x3=27 control points 27*1000*3=81,000 floats When you update it loops through each vertex and calculates how much to move it based on the weighted changes in the control point. So the more control points you have the slower it is. In your picture it looks like you have 9x9x3 control points. That comes to 729,000 floats. It would be really really slow to deform. Chris
Re: SketchyFFD (Free Form Deformation)I'd take "really really slow" over "no such function at all" any day.
Save the Earth, it's the only planet with chocolate.
Re: SketchyFFD (Free Form Deformation)I think its pretty clear what he means.
He much rather have a slow tool that does what he wants then not having that tool at all. Re: SketchyFFD (Free Form Deformation)
Yes they do. Each construction point has its original position stored in an attribute. Thats how I know how far the point moved. But that is only 1/2 the equation. You also need the pre-calculated weight. That is what is missing when you copy a control point. Its that quick because it doesn't have all the calculated weights to process. If you want to try it with more control points do this: -Select the group you want to deform. -Open the ruby console and enter the following line: startFFD(Sketchup.active_model.selection[0],7.0) That will create a 8x8 control grid (8-1=7.0). Delete the points you don't intend to move to make it a bit faster.
Re: SketchyFFD (Free Form Deformation)I made a new version that has a NxN FFD. That means you can select how many control points there are in each direction. It isn't as slow as I expected.
Here is a 12x12x2. I am playing back my undo buffer so it looks faster than it is. Ill post it once I fix a bug or two. Just when I thought I was out they pull me back in. Chris
Re: SketchyFFD (Free Form Deformation)
Exactly! Thanks for clearing that up for me. Save the Earth, it's the only planet with chocolate.
Re: SketchyFFD (Free Form Deformation)Can't wait to play with this, Chris, thank you from the bottom of my heart... been wishing for this for a loooong time.
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