This is my first attempt at working with rust.

So I'm writing a ray tracer, as usual.

Right now, the thing I like with rust are:

• I don't know what I'm doing at all. But I'm following the compiler. I've put lifetime annotation without any idea about what I'm doing. I've put Copy / Clone / PartialEq traits without any idea either. I do suspect that there may be some ugly copy happening in the background...

The things which annoys me, or that I don't understand:

• Who had the idea that Foo::new is a good idea? I'm a C++ developer, so I want to write new Foo. (But there may be a semantic I don't understand yet).
• No polymorphic numbers! It sucks so much to have to write "0." when I want a 0.
• No repl?

How the hell does it work

cargo build && ./target/debug/rust_rt && eog output.ppm

Should display something ugly such as:

That's raytracing of sphere, with lighting, and everything is crappy.