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!Basic elements %%% Basic elements of PD appear in the picture below. The menu PUT has them all listed (there are a couple more, namely array and graph but we won't deal with them right now). %%% %%% '''Object box:''' This is where one puts a command, or a function that will have to return some value. For a list of all available commands right­click on the canvas. %%% %%% Actually, I'm not sure if that list is complete but it will surely get you started. Some of the commands require one or more arguments, which you type into the box separated by spaces. Most of them (all?) will not force you to type an argument (right­clicking on any type of element will bring up a help screen for that element... not all of them are documented, though. They all default to something that will hopefully not produce an error but it is useful to know about the default values and about the arguments in general. What's really fun is that in PD most of that arguments could be variable and one can update/change them on the fly during runtime. Will get to it. Some examples of objects with and without arguments will follow. %%% %%% http://iem.kug.ac.at/pdwiki/images/pdtutorial01.png %%% %%% '''Message Box:''' message boxes send messages to objects. A message could be anything. A string, a number, a float, a combination of those. However, not all objects accept all kinds of messages, so beware. %%% %%% '''Number Box:''' quite obvious. they're useful for sending numbers to objects, messages (in some situations) and other numbers. The numbers can be changed during runtime (unlike numbers in message boxes). Just click (within the num box) and drag and the number will update itself (up=increase, down=decrease). Clicking and dragging with shift key down will change the number into float with 2 decimal spaces and will update by .01. Very useful. Number boxes are also very useful for watching the output of different operations. %%% %%% '''Symbol:''' is the symbol version of number. You can type alphanumeric characters into the box. Dragging does nothing but it could be useful when you want to type your messages on the fly. %%% %%% '''Comment:''' Does nothing. It's a text block useful for commenting your programs. Comments are as useful as they are in all the other programming languages. After all PD is a programming language. %%% %%% The important part is that all elements (well not all...) except for comments, graphs and arrays have inlets and outlets. Inlets are situated on top of the element and outlets in the bottom. Numbers, symbols and messages have one inlet and one outlet. Objects are different. Some have one inlet and one outlet, others have 2 or more inlets and one or more outlets. Some objects have a variable number of inlets/outlets (the number of arguments sets the number of in/out­lets). %%% %%% Now, let's get into some practice. The canvas in the PD application has 2 modes. A "runtime" mode and "edit" mode. The edit mode can be set on and off in the EDIT menu or by hitting Ctrl­e. However, if the edit mode is set to off and you try put an element the patcher will immediately put itself to editing mode. BTW, a patcher is the document/window in which you do your program, which consists of patching different elements together. ---- '''Previous:''' PdTutorialIntro '''Next:''' PdTutorialOverview ----



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