Show HN: Godray – a simple ray tracer

Wrote this with friend as a learning project for golang. Any golang tips would be much appreciated.

What would you recommend for writing a simple ray tracer? Any books or websites?

Are there any dependencies to run it on Windows? I do 'go run src/main.go' on Windows, and nothing happens and there are no errors reported.

What is the license for the code?

How do you find a friend to study and write code with you?