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Flow Field

I've copied the Coding Train video about Flow Fields and translated it into Clojurescript.

I've used Quil for drawing and Figwheel for development. Quil has a nice middleware that let's me draw with immutable data by using an "update" function to produce state for the next frame of drawing. It's very nice, and should be familiar to anyone who has used React and Redux.

figwheel

I have introduced Figwheel into my cljs development flow.

{:deps {com.bhauman/figwheel-main {:mvn/version "0.2.18"}}}

My own html for figwheel development

Place any html you'd like to have Figwheel display when you start it up in the resources/public/index.html file. This lets me use a blank page with the structure I want instead of Figwheel's default (noisy) REPL page.

builds

Builds are defined by edn files in the root directory.

  • dev.cljs.edn defines a dev build
    • the file contains Clojurescript compiler configurations for the build
    • :main specifies the entrypoint

Figwheel can be directed to compile a build and open a repl for it like so:

clj -M -m figwheel.main -b dev -r

Use the clojure command if you're also using something like rebel-readline. Otherwise use clj because it provides its own terminal line reader. In my case, rebel-readline and Warp terminal don't seem to play well together.

Because we have an alias defined in deps.edn called :fig, we can shorten the command above to

clj -M:fig -b dev -r