199 lines
6.7 KiB
Plaintext
199 lines
6.7 KiB
Plaintext
------------------------------------------------------------------------
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VERSION 300 [Mon Dec 12 15:59:02 EST 2005]
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* The world.ss teachpack has changed. It no longer supports
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(update ... produce ...) but instead provides a function
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on-redraw.
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* servlet.ss and servlet2.ss are still missing. Expect their arrival
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for 301.
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------------------------------------------------------------------------
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VERSION 299.200 [Tue Aug 2 17:37:24 EDT 2005]
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* servlet.ss and servlet2.ss are still missing. Expect their arrival
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for 300.
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* draw.ss in the HtDCH teachpack collection has radically changed. See
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the doc.txt file for the new arrangement.
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------------------------------------------------------------------------
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VERSION 209 [Fri Dec 17 10:19:52 EST 2004]
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* fixed small bugs in image.ss and world.ss concerning colors and the
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location of pinholes
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* The interface of the draw teachpack (package) for ProfessorJ has
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changed. A World now supports draw and erase methods. The onTick and
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onKeyEvent methods call erase on the current world, create the next
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world, and then call draw on the new world.
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------------------------------------------------------------------------
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VERSION 208p1
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* fixed a bug in image.ss; find-image now returns the result
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relative to the pinhole. Misc image.ss docs improvements.
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------------------------------------------------------------------------
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VERSION 208 [Fri Jul 30 10:07:21 EDT 2004]
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* image.ss introduces images as algebraic values. Students can create basic
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images such as rectangles, circles, and they can compose them via an
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overlay function. There are also primitives for finding one picture in
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another one and so on. Testing with drawing is now feasible.
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* world.ss enriches image.ss with animation functions. Like draw.ss, it
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comes with big-bang, on-key-event, on-tick, end-of-time for creating a
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world, starting a clock, reacting to clock ticks and keystrokes, and
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ending time. It also comes with a mechanism for display movies. It does
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*not* yet provide primitives for dealing with mouse clicks.
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The performance problems from the TS! workshops have been eliminated.
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------------------------------------------------------------------------
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VERSION 207 [Fri May 14 12:52:43 EDT 2004]
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* draw.ss now comes with functional callbacks for maintaining a visual
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world: big-bang, on-key-event, on-tick, end-of-time
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* draw also comes now as a ProfessorJ implementation in the htdch
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collects directory. This is an experimental teachpack. Docs are available
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via doc.txt. Experiences with students may change this teachpack
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significantly.
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------------------------------------------------------------------------
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VERSION 203 [Thu Dec 5 09:10:40 EST 2002]
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* added get-key-event to draw.ss
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------------------------------------------------------------------------
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VERSION 201 [Wed Jul 24 22:44:19 EDT 2002]
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* added servlet.ss and servlet2.ss
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* all exported functions are primitive operators or higher order primitives
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this improves error reporting behavior in the Beginner languages (before
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higher-order functions are introduced)
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* removed:
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pingp-play.ss
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pingp.ss
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protect-play.ss
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rectangle.ss
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these teachpacks aren't mentioned in htdp, and aren't used for any
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of the additional exercises
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------------------------------------------------------------------------
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VERSION 200alpha1 [Wed Nov 21 13:07:43 EST 2001]
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* Robby converted to modules
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* Fixed bug in convert.ss
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------------------------------------------------------------------------
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VERSION 103 []
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* modified draw.ss interface so that colors are symbols
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use 'red instead of RED
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------------------------------------------------------------------------
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VERSION 102 [Thu Jun 22 18:22:48 CDT 2000]
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* Added "convert.ss" to teachpacks/htdp
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* Fixed error messages for some arity tests
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* Fixed documentation
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------------------------------------------------------------------------
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VERSION 101 [Tue Oct 26 22:28:38 CDT 1999]
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* TERMINOLOGY: We decided to eliminate the terminology "teaching
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library", because it is easily confused with a plain library. As of
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release 101, we refer to one of these objects as a
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teachpack
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* USAGE: Inside of DrScheme, the menu choice called "Language|Set
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library to..." is now called "Language|Set teachpack to...".
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* LOCATION of Files: The distributed teachpacks are found at
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$PLTHOME/teachpack/
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PLTHOME is the location of the PLT software
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The htdp subdirectory contains those files that matter to students who
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use HtDP.
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* CHANGES in individual teachpacks: The most important and most visible
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change in the teachpack support concerns
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hangman.ss
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It now provides two GUI interfaces: (1) hangman for three-letter words
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and (2) hangman-list for words of arbitrary length. See the teachpack
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documentation for details.
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The teachpack
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master.ss
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now exports the procedure _master_, which is exactly like the procedure
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_repl_ in the old master-lib.ss library.
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The corresponding exercises in HtDP have been rewritten and are posted
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on the HtDP Web site.
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* REMINDER: The *purpose* of teachpacks is to supplement student programs
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with code that is beyond the teaching languages (Beginner, Intermediate,
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Advanced). For example, to enable students to play hangman, we supply a
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teachpack that
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- implements the random choosing of a word
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- maintains the state variable of how many guesses have gone wrong
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- manages the GUI.
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All these tasks are beyond students in the third week and/or impose
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nothing memorization of currently useless knowledge on students.
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A teachpack is a signed unit that imports the interface:
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plt:userspace^
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The exported names are added to the read-eval-print loop at the end of
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an EXECUTE step.
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------------------------------------------------------------------------
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Version 100
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The plt:userspace^ signature does not contain the
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graphics library. In order to use the graphics library in your
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teachpacks, use a compound unit and link in graphics directly. For example:
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(require-library "graphics.ss" "graphics")
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(define-signature my-teachpack^ (four))
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(define my-teachpack
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(unit/sig my-teachpack^
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(import plt:userspace^
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graphics^)
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'...
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(define four 4)))
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(compound-unit/sig
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(import [P : plt:userspace^])
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(link [G : graphics^ ((require-library "graphicr.ss" "graphics")
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(P : mzlib:file^)
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(P : mred^))]
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[TP : my-teachpack^ (my-teachpack P G)])
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(export (open TP)))
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The graphics^ signature contains all of the primitives in the
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graphic.ss library. Search for "graphics" in Help Desk for more
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information on those primitives.
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