greenfoot开发素材

The original scenario description is below. However, in this version I've modified the scenario so that the piano works with MIDI instead of sound files. This makes it quicker to load and easier to alter things like instruments if the need arises - and in this situation its generally more flexible. The MidiPlayer class is included, should anyone want to use it to incorporate Midi into their own scenarios. --mjrb4 -- P I A N O -- This scenario was created as a brief demonstration of some Greenfoot programming techniques. It demonstrates, among other things, how you can play sounds. The sound files are in a subdirectory "sounds" inside the project directory. There is one file for every note. Each sound file is bound to one key on the keyboard. I have laid it out for my keyboard (which is a UK keyboard). Since some keys (especially punctuation keys) are laid out differently on different keyboard, you might have to adjust this for your own keybord. This can be done in the "Piano" class. Look at the top of the class. There, arrays are defined called "whiteNotes" and "whiteKeys", which define which note (sound file) is bound to which key (they are bound in the order in which they are listed). The same for "blackNotes" and "blackKeys". Edit this if your keyboard is different. You can, of course, also make entirely different sound files, and bind those to your keys. Then your piano might make all sorts of funny noises... Written by: Michael Kolling, Feb 2007 Copyright (c) Michael Kolling License: Free for any non-commercial use, modification and distribution.