vb.net read usb barcode scanner FIGURE 10.11 in Software

Printer QR Code in Software FIGURE 10.11

FIGURE 10.11
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Create_Font subroutine.
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VECTOR GRAPHICS ROBOT
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data data data data data data data data data data data data data data data data data data data data data data data data
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letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters; letters;
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t,45, f,1, t,45, f,d, t,45, f,4, f,-3, t,-135 f,3*d, t,-45, p,up, e "S", t,-90, f,1, t,135, p,down, f,d, t,-45, f,4 t,-45, f,d, t,-45, f,1, t,-45, f,d, t,-45, f,4 t,45, f,d, t,45, f,1, t,45, f,d, t,45, f,4, t,45 f,d, p,up, t,45, f,5, t,-90, e "T", f,3, t,-90, p,down, f,6, t,-90, f,3, f,-6 t,-90, p,up, f,6, t,-90, e "U", t,-90, f,1, p,down, f,5, p,up, t,90, f,6 t,90, p,down, f,5, t,45, f,d, t,45, f,4, t,45 f,d, p,up, f,-d, t,-45, f,-5, t,45, p,down f,d, p,up, f,-d, t,135, e "V", t,90, f,-6, p,down, f,3, t,-45, f,3*d t,-90, f,3*d, t,-45, f,3, p,up, f,-6, t,90, e "W", t,90, f,-6, p,down, f,6, t,-135, f,3*d t,90, f,3*d, t,-135, f,6, p,up, f,-6, t,90, e "X", t,90, f,-6, p,down, t,-45, f,6*d, t,45 p,up, f,-6, t,45, p,down, f,6*d, p,up, t,-135 f,6, e "Y", f,3, p,down, t,-90, f,3, t,-45, f,3*d t,-45, p,up, f,-6, t,-45, p,down, f,3*d, p,up t,-45, f,3, t,-90, f,3, e "Z", t,-90, f,6, t,-90, p,down, f,-6, t,-45 f,6*d, t,45, f,-6, t,180, p,up, e
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//------------Fonts Letter_No = 0 Dim Letters[27,100] Inst_Count = 0 for i = 0 to MaxDim(letters,1)-1 if Inst_Count=0 Letter_No = Ascii(upper(letters [i]))-Ascii("A") Letters[Letter_No,Inst_Count] = letters[i] Inst_Count = Inst_Count+1 continue endif Letters[Letter_No,Inst _Count] = letters[i] Inst_Count = Inst_Count+1 if letters[i] = e Inst_Count = 0 endif next Return
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FIGURE 10.11
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(Continued )
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In the array of fonts the rst element in each row is the letter itself. This is useful for two reasons. First it is a good self-documenting practice. Second we can use the ASCII code of the letter to be able to put the data in the correct row in the array Letters[ ]. The code iterates into the letters[ ] array until it nds an end of instruction command (e), and then looks for the next letter to calculate the row into which to put the data that follows.
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DEVELOPING A TOOLBOX OF BEHAVIORS
10.3 Summary
In this chapter you have learned: How to draw on the screen with the robot using rPen. How to draw shapes such as circles, rectangles, triangles, or any other shape. About the trigonometric and other mathematic functions in RobotBASIC. About string manipulation and formatting functions like Substring(), Ascii(), Upper(), and Length(). How to utilize arrays, the Data and Dim commands, and the MaxDim() function. How to make the robot write messages. Now, try to do the exercises in the next section. If you have dif culty read the hints.
10.4 Exercises
1. Most of the programs in this chapter do not avoid obstacles while doing the drawing
action. Can you combine obstacle avoidance with the programs in Sec. 10.1
HINT:
See Chaps 4 and 5.
2. The program in Fig. 10.3 draws a circle starting at the robots position rather than
a circle whose center is the robot position. Can you write a program that makes the robot draw a circle (or an arc of a circle) given the radius and centre coordinates of the circle
HINT:
The formula for a circle is: X Y R Sin R Cos Cy Cx goes from 0 to
Where R is the circle s radius, Cx and Cy are the circle s center coordinates, 360 (or any part of 0 to 360 for a partial circle).
3. Modify the main program in Fig. 10.10 to accept a message from the user then allow
the user to place the robot on the screen at any heading.
HINT: Use the Input command. For placing the robot you can either use the Input command or you can make use of the mouse as in Fig. 7.9 (Chap. 7).
4. Modify the program of Fig. 10.10 to write a message in a circle. See Fig. 10.12 for
a sample output.
VECTOR GRAPHICS ROBOT
FIGURE 10.12
Sample output desired in Exercise 3.
HINT:
You will need to reposition the robot for each letter at the right position and at the right heading (see Exercise 2).
5. The array of fonts (Fig. 10.11) does not de ne the numerals 0 9. Add the required
code to achieve this. You will need to change some of the code in the Print_Message subroutine to allow for the new fonts. Notice that the ASCII code for 0 9 is not contiguous with the ASCII code for the letters.
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PA R T
COMPLEX COMPOUND BEHAVIORS
Part 3 capitalizes on all the skills and experiences gained in Parts 1 and 2 to build complete, useful, and interesting projects. The reader, at this point in the text, is expected to be fully competent with the language and simulator. Single behaviors are combined to create compound complex behaviors. Many of the programs developed in previous chapters are modi ed to function in combination, allowing for smooth transitions from one behavior to another, creating an overall behavior that achieves a multifaceted and realistic job. We acquaint the reader with more advanced ideas in computer science by introducing topics such as graphs, lists, stacks, queues, and simple databases. We also explore the software-engineering skills required to pro ciently handle the process of conceiving, specifying, designing, and building a complete practical project. Each chapter evolves the project by considering initial designs and then improving on the designs up to a certain level. Possible additional improvements are discussed and suggested for the readers to accomplish on their own. Upon completing Part 3 you will Have full ability in utilizing all the features of the robot simulator. Have advanced knowledge of the RobotBASIC language. Have the skills to program complex and realistic projects. Be familiar with some software engineering skills required during the life cycle of a robotics project. Appreciate the concepts of some computer science topics related to the eld of arti cial intelligence (AI).
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