barcode rendering framework c# example NXT TURTLE in Font

Generate PDF-417 2d barcode in Font NXT TURTLE

CHAPTER 6 NXT TURTLE
Creating PDF417 In None
Using Barcode maker for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Barcode Generation In None
Using Barcode drawer for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
else { ClearScreen(); TextOut(30,LCD_LINE3,"Turn left"); OnRevSync(LEGS,100,-80); } // save actual time to use as offset later start_time = CurrentTick(); //wait for the timer to elapse or another object to come near until ( (CurrentTick()-start_time)>TURN_TIME || SensorUS(EYES) < NEAR ); Float(LEGS); } } The program starts executing the main task. At the beginning, the input ports are initialized, then the program enters into a perpetual loop. The head is brought out, calling the MoveHead(OUT) subroutine. The legs are started with OnFwdSync(LEGS,100,0), which tells the motors to move synchronized at full speed, with a Turn Ratio equal to zero, because the turtle must go straight. The program flow stops at the while (SensorUS(EYES) > NEAR) statement, checking the specified condition continuously (object seen further than NEAR). When it becomes true, the head is retracted, calling MoveHead(IN), and the legs are told to walk backwards in sync with OnRevSync (LEGS,100,0). Another blocking wait follows. With while (SensorUS(EYES) < FAR) the program waits for the object to be nearer than FAR; at that point, the head is moved out again, and a random turning direction is chosen. The function calling Random(2) generates random numbers that can be 1 or 0, so the condition if(Random(2)==1) can be true or false, allowing a choice between turning left or right. The turning is achieved by starting the legs with the NXC function OnRevSync(LEGS,100,80); the Turn Ratio makes the motors rotate in opposite directions.
PDF 417 Generator In None
Using Barcode drawer for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
QR Code JIS X 0510 Encoder In None
Using Barcode generator for Font Control to generate, create QR Code JIS X 0510 image in Font applications.
www.OnBarcode.com
speed, turn_ratio) and OnRevSync(...) functions, the NXT starts two motors (OUT_AB, OUT_BC, OUT_AC), controlling their relative speed, specified by the turn_ratio argument. With a turn_ratio equal to 0, the motors speeds are controlled to be perfectly equal and a wheeled robot would go straight. With a negative turn_ratio, the robot would turn in one direction; with a positive value, the robot would turn in the other direction. The turn_ratio can be any value from -100 to 100. Check the NXC Programming Guide for further details.
Barcode Drawer In None
Using Barcode encoder for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Creating ANSI/AIM Code 128 In None
Using Barcode creation for Font Control to generate, create Code 128 Code Set A image in Font applications.
www.OnBarcode.com
Using the OnFwdSync(ports, Tip
Make UPC - 13 In None
Using Barcode generator for Font Control to generate, create UPC - 13 image in Font applications.
www.OnBarcode.com
Making UPC-E Supplement 2 In None
Using Barcode maker for Font Control to generate, create UPC - E0 image in Font applications.
www.OnBarcode.com
After the legs are started, the actual system time is saved into the start_time variable, an unsigned long integer variable with values from 0 to 232 1. This action corresponds to a timer reset.
Encoding PDF 417 In None
Using Barcode drawer for Software Control to generate, create PDF417 image in Software applications.
www.OnBarcode.com
Encoding PDF 417 In Visual C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create PDF417 image in VS .NET applications.
www.OnBarcode.com
CHAPTER 6 NXT TURTLE
Decoding Code 128 In .NET
Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Drawing GTIN - 13 In VB.NET
Using Barcode maker for VS .NET Control to generate, create EAN 13 image in .NET framework applications.
www.OnBarcode.com
TIMERS
EAN / UCC - 13 Generator In None
Using Barcode maker for Software Control to generate, create EAN / UCC - 13 image in Software applications.
www.OnBarcode.com
Code 128B Maker In None
Using Barcode encoder for Software Control to generate, create Code 128 Code Set B image in Software applications.
www.OnBarcode.com
It s worth saying a few words about the timer provided by the NXT brick. Although RCX standard firmware provides three one-hundredth of a second resolution timers, NXT has only one timer, with a one-thousandth of a second resolution. That timer can count up to 232 milliseconds. This corresponds to 49 days, 17 hours, 2 minutes, 47 seconds, and 296 milliseconds of continuous operation. I think this is quite enough for anyone s needs.
Recognize GS1 - 12 In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Code39 Reader In C#
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Why should you use a timer when the easy Wait function is available Simple: by using Wait, the program flow would stop for a specified number of milliseconds, during which you could not check for other occurring events. In this case you want to continue checking for events while waiting for the time to elapse, and these events would stop the waiting, even if the time has not passed yet. To do this, you should replace the Wait(TURNING_TIME) statement with the following: until ( (CurrentTick()-start_time)>TURN_TIME || SensorUS(EYES) < NEAR ); You can check both the timer elapsing and the occurrence of other events, like an object approaching or sounds occurring. In the preceding statement, you can check simultaneously if the timer has elapsed or if the object has gone out of view. It s enough for one condition to become true to break out of the loop. The until() loop will stop waiting if the time difference CurrentTick()-start_time grows bigger than TURN_TIME (first condition), or if the obstacle comes closer than NEAR (second condition). The only two system calls to access the system timer are FirstTick(), which returns the ticks from the NXT startup to program start, and CurrentTick(), which returns ticks from the NXT startup to the actual system call moment. In the preceding wait loop, the following difference is checked against TURN_TIME: (CurrentTick()-start_time) CurrentTick() minus start_time yields the time elapsed from the time contained in the start_time variable. Before the loop, you saved the actual system time in that variable, so you are checking for the time elapsed from the statement that performs the timer reset. If the time elapsed is more than TURN_TIME, the condition will be true, and this will be sufficient to stop waiting in the loop. On the other hand, if the other condition (SensorUS(EYES) < NEAR) becomes true, the waiting will stop, even if the TURN_TIME has not elapsed. In general, to add other conditions into this special wait loop, it is enough to add them inside the parentheses, by using the suitable logical operators (logical AND &&, logical OR ||, and logical NOT !). To see how the Boolean operators AND, OR, and NOT work, check out the sidebar Boolean Operators.
Create Barcode In None
Using Barcode encoder for Excel Control to generate, create Barcode image in Microsoft Excel applications.
www.OnBarcode.com
Creating UCC - 12 In Objective-C
Using Barcode maker for iPhone Control to generate, create GTIN - 128 image in iPhone applications.
www.OnBarcode.com
Generate GS1 - 12 In Objective-C
Using Barcode printer for iPhone Control to generate, create UPC-A image in iPhone applications.
www.OnBarcode.com
Generate Code 39 Full ASCII In None
Using Barcode maker for Software Control to generate, create Code 39 Full ASCII image in Software applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.