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Add a link to get-initial-matrix. #40

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Add a link to get-initial-matrix. #40

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25 changes: 15 additions & 10 deletions sicp-doc/sicp-pict.scrbl
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
(only-in racket/sequence sequence/c)
(only-in racket/class is-a?/c)
(only-in racket/draw
dc<%>
bitmap% bitmap-dc%
color% pen% brush%
make-bitmap)
Expand Down Expand Up @@ -253,26 +254,30 @@ the first vect to the endpoint of the second vect.
}

@defform[(with-transformation transformation-expr body ...)]{
Store the @racket[initial-matrix] of the drawing context given by @racket[current-dc].

Install @racket[transformation-expr] as the @racket[initial-matrix].

Evaluate @racket[body ...].
@itemlist[
@item{Store the initial-matrix of the drawing context given by @racket[current-dc].}
@item{Install @racket[transformation-expr] as the initial-matrix.}
@item{Evaluate @racket[body ...].}
@item{Restore the saved initial-matrix.}
]

Restore the saved @racket[initial-matrix].
See also @method[dc<%> get-initial-matrix].
}

@defform[(with-frame frame-expr body ...)]{
Evaluate @racket[body ...] while the @racket[initial-matrix] of the drawing context @racket[current-dc]
is given by the transformation corresponding to @racket[frame-expr].
Evaluate @racket[body ...] while the initial-matrix of
the drawing context @racket[current-dc] is given by the transformation
corresponding to @racket[frame-expr].
}

@defform[(with-pen pen-expr body ...)]{
Evaluate @racket[body ...] while @racket[pen-expr] is installed in the drawing context given by @racket[current-dc].
Evaluate @racket[body ...] while @racket[pen-expr] is installed
in the drawing context given by @racket[current-dc].
}

@defform[(with-brush brush-expr body ...)]{
Evaluate @racket[body ...] while @racket[brush-expr] is installed in the drawing context given by @racket[current-dc].
Evaluate @racket[body ...] while @racket[brush-expr] is installed
in the drawing context given by @racket[current-dc].
}

@section{Primitive Painters}
Expand Down