I like use computation help me imitate the beautiful thing in nature when I do form finding in design. In a design studio, our instructor let us choose a beautiful natural phenomena to learn its regulation and use that regulation to make form. My partner and I think the way flowers and anemones grow is fascinating. They have so many fold on their surface is because of differential growth.

According to the reference, wo know that principle of differential growth in 2D surface are:

Nodes and Edges: nodes are connected to a certain number of neighboring nodes through edges.

Attraction: connected nodes will try to maintain a reasonably close proximity to each other. In the figure below attraction happens between connected nodes in the loop.

Rejection: nodes will try to avoid being too close to surrounding nodes (within a certain distance). Rejection fores are indicated by cyan lines in the figure below.

Splits: If an edges gets too long, a new node will be injected at the middle of the edge.

Growth: in addition to the splits, new nodes are injected according to some growth scheme. I will describe this further soon.

(https://inconvergent.net/2016/shepherding-random-growth/#container-uniform)

As we didn’t know how to code, we use grasshopper, a graphical algorithm editor tightly integrated with Rhino’s 3-D modeling tools to imitate differential growth.

I am interested in these generative projects in Inspiration. I want make the project looks like growing creature like plants and cells.

Now I cannot deal with complicated form generation, I can only write very short program. So when I tried to do differential growth in 3D, I had to rely on my partner, I still cannot understand the code he write.

I think web editor is very interesting, and I feel that I can do a lot of thing on it even though I still do not know too much about it. I have not use github before.

Question: I want to let the trail of circle vanish slowly, what should I do? Should I set background color with [alpha] value?