The Ray Tracer Challenge

Putting It Together

As far as first steps go, this one wasn’t too bad, and it’s laid the groundwork for some great things. You’ve got a working implementation of points and vectors! Those things are going to pop up everywhere. Sadly, you have no ray tracer yet to plug your code into, but you can still have some fun with it.

Try playing with this little program, firing virtual projectiles and seeing how far they go. It’ll let you exercise the vector and point routines you’ve written. Start with the following two data structures:

• A projectile has a position (a point) and a velocity (a vector).
• An environment has gravity (a vector) and wind (a vector).

Then, add a tick(environment, projectile) function which returns a new projectile, representing ...