adapting quil's create-graphics example to spit out a pdf generates a 0 byte pdf

[ghost]

Not sure where I am doing something wrong, but I tried to change the example at
to one where the image would be spitted out as pdf by changing line 42 from

(let [gr (create-graphics spiral-size spiral-size :java2d)]

to

(let [gr (create-graphics spiral-size spiral-size :pdf "filename.pdf")]

and changing line 48-49

(with-graphics gr (draw-spiral))

to

(with-graphics gr (draw-spiral) (exit))

Not sure why it doesn't spit out a pdf. Maybe some trivial misunderstanding on my side.

[nbeloglazov]

Hi. Sorry for the late reply. I did some debugging and it's indeed impossible to do using only quil API, you'll have to use java interop. So the code will look like this:

(let [gr (create-graphics spiral-size spiral-size :pdf "filename.pdf")]
  (with-graphics gr (draw-spiral))
  (.dispose gr))

Note the (.dispose gr) call at the end. This call closes pdf writer and flushes all content to file on disk. Actually I think there is a more idiomatic Processing way to do it using beginRecord() and endRecord() methods, but quil currently doesn't expose them. I'll add do-record macro:

(do-record (create-graphics spiral-size spiral-size :pdf "filename.pdf")
  (draw-spiral))