Tham khảo tài liệu 'hacking roomba - tod part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 132 Part II Fun Things to Do Processing is an application for Windows Mac OS X or Linux. When first run it presents a simple text-editing window with a few controls on top. Figure 7-1 shows what it looks like on Mac OS X Figure 7-2 shows it on Windows. The interface is identical save for the platformspecific menu items. The Linux version looks almost identical to the Windows version. In the text-editing window you write your sketch. A sketch consists of a list ofJava-like commands like line to draw lines ellipse to draw ellipses and text to draw text. A sketch can create either static graphics or dynamic animations that respond to user input. Figure 7-1 Processing on Mac OS X The sketch can then be run by clicking the Run button right-pointing arrow button and stopped with Stop square box icon button . If there are syntax problems with the sketch they will be described in the black status window at the bottom and highlighted in the sketch window. A sketch can be saved named and reloaded just like with any text editor. When you re happy with the sketch you can export it as a web page with embedded applet. You can also export it as an application and Processing will create true executables for all three operating systems. In many ways Processing is a descendant of the Logo programming language. Both are visually focused and provide a number of functions to make drawing graphics easier. However Processing can do much more. It can operate in 3D work with video and sound talk over the Internet and MIDI perform physics simulations and do many other things. It s continuously being expanded and improved through libraries created by anyone with a good idea. Chapter 7 Making RoombaView 133 Figure 7-2 Processing on Windows How Processing Works Processing is implemented in Java. The simple commands that are part of the sketch are actually method names and variables of the Java class within which sketches run. The Processing language is really no different from Java at all it .
