vb.net barcode reader from webcam Implementing the Algorithm in Software

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16.4 Implementing the Algorithm
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Figure 16.4 shows a program that implements the algorithm described in the previous section. If you are running the program for the rst time read the instructions and press Enter or click the OK button to continue. You will see the environment shown in Fig. 16.5. Do not press the Cancel button (or Esc key) if you have never run the program before, since there are no memories for the robot to reload. However, once there are memories you can always stop the program and run it at a later date and have the robot recall its previous experiences (by pressing the Cancel button or Esc key). Notice how the RestoreMemory subroutine uses the FilExists() function to avoid loading the memory les if they do not exist. The robot starts out with all of its needs at maximum value as indicated by the bar graphs on the right side of the screen in Fig. 16.5. The robot begins exploring its environment and if it bumps into objects, gets too close to the re, or wanders into a briar patch, the appropriate information will be saved to the bad memory list. Eventually, the robot will nd the garden and eat. This will satisfy the hunger need, which will be indicated by the meter on the right of the screen gradually reducing to zero as the robot eats. The action and the environmental conditions that led to the food will be saved in the good memory. Notice that when the program is running, two counters at the top of the screen show the number of items stored in the good and bad memory lists. In the beginning, the bad memory will ll quickly. The good memory, on the other hand, will expand very slowly because the robot will have a hard time nding situations that satisfy its needs. Remember, the robot has no knowledge of how to go to places that cause it to be happy. The situations it randomly encounters in the environment, along with the built-in biological factors and previous memories, determine what is stored in the robot s memory. Ultimately, this memory will control the robot s behavior and its personality.
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GOING FURTHER
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//---Constants //--Action NOACTION = 0 EAT = 1 SLEEP = 2 PLAY = 3 EXPLORE = 4 SAVE = 5 RETREAT = 6 RESPOND = 7 //--Status HUNGRY = 0 SLEEPY = 1 BORED = 2 //--Feeling PAIN = 1 PLEASURE = 2 //--Headings NORTH = 0 EAST = 1 SOUTH = 2 WEST = 3 NEEDS_THRESHOLD = 85 EAT_AREA = 8 SLEEP_AREA_1 = 20 SLEEP_AREA_2 = 26 PLAY_AREA = 0 PAIN_AREA_1 = 11 PAIN_AREA_2 = 29 PAIN_AREA_3 = 25 //=============================================================== //============================================================= MainProgram: GoSub DisplayInstructions GoSub InitializeSimulation if not Key then GoSub RestoreMemory GoSub ComeToLife End //============================================================= //============================================================= //--- Subroutine RestoreMemory //--- Inputs : none //--- Outputs : Memory[],BadList[],MemPtr,BadPtr //--- Calls To: none //--//--- Reads the arrays Memory[] and BadList[] from files //--- created by previous runs. //------------------------------------------------------------RestoreMemory: if FilExists("MemoryGood") and FilExists("MemoryBad") MRead Memory,"MemoryGood"
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FIGURE 16.4 This program creates a robot with biological needs and the ability to learn how to satisfy them.
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TRUE INTELLIGENCE: ADAPTIVE BEHAVIOR
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MRead BadList,"MemoryBad" MemPtr = Memory[99,0] BadPtr = BadList[99,0] endif Return //============================================================= //============================================================= //--- Subroutine ComeToLife //--- Inputs : none //--- Outputs : none //--- Calls To: CheckMemory,DisplayAction,DoMovement //--CheckBadList //--- Makes the robot do SOMETHING either based on memory of //--- past experiences or some new random choice. The robot's //--- memory is altered as the robot encounters pain and //--- pleasure. //------------------------------------------------------------ComeToLife: while true gosub CheckMemory if HaveResponse Action = RESPOND gosub DisplayAction Movement = Memory[HaveResponse,2] gosub DoMovement else if random(50)>=20 then Movement = Random(4) gosub CheckBadList if not Bad Action=EXPLORE gosub DisplayAction gosub DoMovement if Status = PAIN // Save to bad list BadList[BadPtr,0]=LastCell BadList[BadPtr,1]=Movement BadPtr = BadPtr+1 elseif Status = PLEASURE //Save to Memory if NOT there already AddIt = True if MemPtr>0 for i=0 to MemPtr-1 if Memory[i,0]=CurNeed and Memory[i,1]=LastCell AddIt = False break endif next endif if AddIt Memory[MemPtr, 0] = CurNeed Memory[MemPtr, 1] = LastCell Memory[MemPtr, 2] = Movement if (MemPtr=25) or (MemPtr=50) or (MemPtr=75) Memory[99,0]=MemPtr+1 BadList[99,0]=BadPtr MWrite Memory,"MemoryGood" MWrite BadList,"MemoryBad"
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