A Rust (compiled to WASM) + JS multi-threaded in-browser fractal generator
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James Wilson
James Wilson update dependencies
Latest commit 3761793 Sep 24, 2018


WASM Fractal Generator

View it here (Requires a browser that supports WASM: Edge 16+, Firefox 53+, Chrome 57+, Safari 11+).

A Fractal generator written in Rust + JavaScript.

The Rust code is compiled to WASM and is the heart of the fractal generator. The main thread queues up work to hand out to multiple Web Workers, who themselves instantiate and run WASM to generate the resulting data, which is then sent back to the main thread to be splatted onto one of a few canvases to progressively render from low to retina quality resolution.

There are a couple of things that can be tweaked/obtained in the console (iters is the main one).


We need nightly Rust (at present) for this to work. The following steps need running once to set everything up:

# install the nightly toolchain (I've tested this specific
# version, but it shouldn't be hard to use a newer one):
rustup install nightly-2018-09-24

# use this nightly toolchain. can go back to
# stable with 'rustup default stable'
rustup default nightly-2018-09-24

# add our wasm build target:
rustup target add wasm32-unknown-unknown

# install the bindgen cli tool to generate js<->wasm bindings
# (matching the version of the wasm-bindgen library that we use).
# add --force to override an existing installed version.
cargo install wasm-bindgen-cli --version 0.2.22

From there, running the following in the root directory of the project builds it (in release mode) and generates the js bindings to the wasm:

cargo build --release --target wasm32-unknown-unknown
wasm-bindgen target/wasm32-unknown-unknown/release/wasm_fractal.wasm --no-modules --no-modules-global wasmFractal --no-typescript --out-dir js