config

While playing with different number of iterations for the Koch L-system. You probably noticed that sometimes the image would be drawn outside the borders of the screen.

For example, the command 

cargo run -- -f system/koch.ls -n 5

Will result in a picture similar to the one below.

The Koch curve drawn outside the boundary

The config section in koch.ls will be enable us to remedy that.

step

The config section has a number of key value pairs. One of them is step. This controls how big the line segment is whenever line segment is drawn. When you change it to 2 and run the the command above, we will capture the Koch curve inside the window.

The Koch curve in full glory

angle

There is an other option you can configure. I.e. angle. This determines the number of degrees through which a turn is made. Change the configuration to have a step of 30 and an angle of 80. Next run the L-system for 4 iterations.

A pointier Koch curve

Exercises

  1. Play with the configuration to produce a variety of different images.