Deborah R. Fowler
RBD Marble Machine
- timescale and using stl file
Posted on June 22 2020
I ran across a marble machine that you can 3D print which I thought was very cool. Since I don't have a 3D printer, I decided to see if I could extend this and run an RBD simulation in Houdini.
I used the single base model and then used clip, groups, and polyextrude, to go beyond the 4 disc version (see below with 6).
- Credit to Yosuke Ikeda for the base single disc stl model.https://www.thingiverse.com/thing:4429805
- Yousuke Ikeda's video of the physical "Marble Machine Kaleidoscope" is also on youtube.
When running the RBD simulation, it was important to pay attention to initial state - note the flipping of the yellow and green sphere's below. Correct one on the right, Incorrect on the left
Extending beyond the four configuration was key. Below is a single, double, four, six and fourteen configuration.
Look development also came into play. Using references for solid glass marbles to select the color and eliminating some other experiments the final result was obtained with the porcelain shader in mantra (for now). Below is an experiment with a liquid shader (look more like bouncy balls), the images above tinted glass, and the final version in the video porcelain with colors based on reference images.
References:
etsy
walmartFinally, the configuration with 14:
