Hi @altamiro.aj ,
regarding doing this with Kangaroo-
That sounds like something wrong in your setup - for something simple like this it should be effectively instantaneous.
Hi @altamiro.aj ,
regarding doing this with Kangaroo-
That sounds like something wrong in your setup - for something simple like this it should be effectively instantaneous.
For instance - hereās a linkage where each part is a ~5MB mesh
No, and I understand that is frustrating. Iāve logged the issue here since I couldnāt find an existing one. The views themselves can be animated though. Hereās a quick example.
Yes, Bongo handles these as animation sets. You can read a bit more about them in the Animation Sets tutorial.
This is a setup of the Pitch Control model used to observe the operation of the mechanism, rather than portray it in a video.
The steering disc is given only one keyframe at tick 0. The entries in this keyframe are used like a parameter to investigate the effect on the blades. The timeline can be used to follow the result of the rotation.
The 3 āobservationā views are animated in such way that the camera follows the rotation of the system.
Your longing for sliders to control the mechanism got me thinking. Currently the Expressions section of keyframes can be used not only to enter expressions but also as a kind of a āconstantā simply by entering a value. So letās see if we can add a slider interface to adjust the value and there we areā¦ a parameter. https://mcneel.myjetbrains.com/youtrack/issue/BO-3297
This way of setting up the observers and being able to see then in real time at same moment is a really clever way of doing something in a easier way than what I do now.
Thank you, I hope it works out
Bongo 3 displays red constraint icons in the model. Some of these icons are shown in the following screenshot. I believe that these icons should be clickable so that we can EASILY change the constraints.
Thatās a good idea. We have the bug logged here. Iāll try to find some time for it.
Hi,
Excellent structures to explore the marvels of Physics. Stuff for a tutorial video. Meanwhile some explanations. For starters : all the following models were made in WIP 7 (not 6) Bongo 3.0 WIP 7 - #4 by Luc
Model B 1138590816 B.3dm (609.7 KB)
Model B is really quite simple.
Both the rotor and the square ring are Physics enabled. The white sleeves are merely decorative, simply to make the image complete.
The rotor is connected to the World by a Spindle. This spindle is given angular velocity (a novelty since WIP 7 ā the unit is radians/second). You can use the BongoConnectionsManager command to see the Connections.
Model A 1138590816 A.3dm (648.1 KB)
In Model A the rotor is rotated by Keyframes (just like in Bongo 2). This is a equivalent alternative to the use of āmotorā connections. The object is Physics enabled and marked āKinematicā ā what is necessary for it to meet its keyframe parameters.
The wheel is Spindle-connected to the shackle, which in its turn is Slider-connected to the World. The wheel is Gravity enabled. Both rotor and wheel are set; Restitution = minimum, Friction = maximum. The Physics Mash Quality is set to medium in order to have a smooth contact between the curvatures. Because the objects are built with consideration of (at least) 0.04 units (cm) interspace the āOffset shapeā can be disabled, hence avoiding intersection of the objects during motion. A smaller margin setting (0.02 units (cm)) even brings both wheels closer together.
Donāt try ZERO margin ā Rhino crashes.
You may notice model A kind of āfreezesā during Precalculation. Donāt worry; Rhino will regain consciousness after a short while (about 30 seconds on my laptop). Apparently this is an enigma for the developers.
I have always found that the lack of surface-to-surface constraint was a shortcoming in Bongoās 2.0 Inverse Kinematic, just like the elasticity of a spring. Physics offers both features and more. The price to pay is the multiplicity of parameters which play a role in Physics. Hopefully in the further we can bring some harmony and coherence in this as well as the highly necessary documentation.
A cute variation. 1138590816 C.3dm (595.1 KB)
Luc
Hi, Luc, first of all, thank you very much for your detailed reply which solves my thinking day and night confusion. Well, as you said, the building of future Bongo will add more Physics function, we all hope Bongo can test most mechanical movement like Ug or SolidWorks. That will be a very meaningful work.
Tiny Correction. Itās not per se a zero margin that causing a crash. Itās zero margin combined with āOffset shape by marginā enabled. Will be fixed in the WIP 8.