vb.net read usb barcode scanner INTRODUCTION TO ROBOTBASIC in Software

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INTRODUCTION TO ROBOTBASIC
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FIGURE 2.1 The Editor Screen.
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FIGURE 2.2
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To run the program currently being edited either, click the Run menu and the Run Program submenu, or press the button, or use the Ctrl+R key combination on the keyboard. Running a program will open the Terminal Screen window and display any program interaction on this screen. 2.2.2 THE TERMINAL SCREEN The Terminal Screen (Fig. 2.3) is where the program s input and output take place. This screen has many features. For complete details on these features and how to utilize them, refer to App. A. 2.2.3 THE HELP SCREEN The Help Screen (Fig. 2.4) provides explanations and details of the RobotBASIC language and other aspects of the entire system. The screen has a drop-down combo-box that allows you to choose the desired Help Screen from a list of topics. Information given in this screen is discussed in Apps. A, B, C, and D. Having all the information available on this screen is convenient while writing programs and provides the most up-to-date details. Any help text can be selected and copied to the Windows Clipboard using the button or Ctrl+C key combination. The button or Ctrl+F allows you to search the text in the currently displayed section for easy location of the topics relating to your query.
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FIGURE 2.3 The Terminal Screen.
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FIGURE 2.4 The Help Screen.
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2.3 Creating, Running, and Saving a Program
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The Editor Screen (Fig. 2.1) is where you create your programs. The editor is very similar to the Windows Notepad program. You can type text, cut, paste, copy, search, search and replace, print, save to a le, and load from a le. To create a new le, press the button. There is a button for each of the actions listed above. If your program has been previously created and saved you can load the
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INTRODUCTION TO ROBOTBASIC
program using the button, which will bring up a dialog box that allows you to select the le required. Pressing the button brings up another dialog box that allows you to save the text currently in the editor to any le you name, or overwrite an existing le if required. Once you are ready to test your program press the button to run the program currently in the text editor. This will show the Terminal Screen (Fig. 2.3) and the program s output will be displayed on this screen.
2.4 The Robot Simulator
RobotBASIC makes it easy to simulate a robot on the Terminal Screen. There are many aspects to the simulated robot that will be described in later chapters. Here we will show you how to create a robot and make it move around the screen. The Terminal Screen simulates a room with four walls that normally measures 800 600 pixels. The robot s world is limited by the con nes of this room. Given a robot diameter of 40 pixels, we can get a feel for the scale of things. Assuming a real robot of 12-in diameter we can calculate the room dimensions to be 800 12/40 240 in, that is, 20 ft and 600 12/40 180 in, that is, 15 ft. So the default simulated robot represents a 1-ft diameter robot in a room measuring 20 15 ft. These proportions can be altered, if needed, by changing the size of the robot. The room can be empty or lled with objects like sofas, tables, chairs, toys, and so on. You can even divide it up into further rooms or partitions such as in an of ce environment. For some simulations, discussed in the coming chapters, you will need to draw lines on the oor and hang lights from the ceiling to act as homing beacons. RobotBASIC has many commands for drawing graphics on the screen that can be used to simulate all of the above. See Sec. C.7 for details on these drawing commands. 2.4.1 INITIALIZING THE ROBOT Before you can use the robot in any simulations you must initialize the robot and place it in the environment. The environment has to be created before placing the robot in it. The command to initialize and place the robot on the screen is:
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