Re: [racket-users] Re: How to draw an arc with module `graphics/turtles`?

Thank you, I just implemented a UCBLogo compatible `arc`: (define (arc angle radius)   (let* ([alpha (* 2 (asin (/ 1 (* 2 radius]          [rangle (* pi (/ angle 180))]          [n (abs (/ rangle alpha))]          [astep (if (> angle 0) (- alpha) alpha)])     (tprompt      (move radius)      

[racket-users] How to draw an arc with module `graphics/turtles`?

I am imitating the Logo API to draw some shapes with `graphics/turtles`, but in it I only find functions to draw lines, is there a way to draw an arc? Greetings. Killian Zhuo (KDr2, https://kdr2.com) -- You received this message because you are subscribed to the Google Groups "Racket

[racket-users] Is there a widget like QSplitter in Qt in our GUI library?

I want to split a pane into two columns and make the columns resizable by dragging their joint border, in Qt, there's an established widget called QSplitter for this purpose. Is there one in Racket's GUI library? or how to implement it in the easiest way? Thanks. Greetings. Killian Zhuo (KDr2,

Re: [racket-users] Is there a widget like QSplitter in Qt in our GUI library?

://gist.github.com/Metaxal/946aa17033c10e76c48a74127ae0b11b [1] https://docs.racket-lang.org/framework/Panel.html?q=panel%3Avertical-dragable#%28def._%28%28lib._framework%2Fmain..rkt%29._panel~3avertical-dragable~25%29%29 On Wed, Mar 31, 2021 at 9:08 AM 'Killian Zhuo (KDr2)' via Racket Users wrote: I

[racket-users] Error while compiling Racket BC

Here is my configure command: ./configure --enable-cs --enable-bc --enable-csdefault --enable-racket=$HOME/programs/racket/bin/racket $HOME/programs/racket/bin/racket is a prebuilt Racket whose version is 7.9. Then I ran `make cs` and `make install-cs`, all worked well. Then `make bc` it also

Re: [racket-users] Error while compiling Racket BC

of Racket that is too old (which might be quite recent but is nonetheless too old to use in place of bootstrapping).  Sam On Fri, Feb 5, 2021, 6:44 PM 'Killian Zhuo (KDr2)' via Racket Users wrote: Here is my configure command: ./configure --enable-cs --enable-bc --enable-csdefault --enable

Re: [racket-users] Error while compiling Racket BC

eb 2021 17:57:31 -0600, Shu-Hung You wrote: > The snapshot build here may help: https://snapshot.racket-lang.org/ > > The HEAD version could add new internal primitives from time to time. > > Shu-Hung > > On Fri, Feb 5, 2021 at 5:52 PM 'Killian Zhuo (KDr2)' via Racket User

Re: [racket-users] Error while compiling Racket BC

Thank you for the reply, it helped me a lot. I was following  https://github.com/racket/racket/blob/master/racket/src/README.txt to build a minimal racket (both bc and cs), and now I found out a way to do that: in `racket/src` directory:        ./configure --enable-cs --enable-bc