Use w a s d to pan the camera
Move your mouse on the camera to look around
Space to fly up, Shift to descend
Raytracing is done with WebAssembly in Rust. After creating a Vector
in memory corresponding to the 32 bit rgba pixel values, the wasm code
returns a pointer to JavaScript that gets read into an
ImageData and drawn on a canvas for every frame.
The code is adapted for Rust + Webassembly from Ray Tracing in one Weekend.