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BugsWorld Project

BugsWorld Project. The Game The Simulator The Language The Translator. The Game: It’s a BugsWorld!. The Simulator. Client. Client. Server. Display. Display. Client. Simulator Continued…. One server, multiple clients and displays

arthur-espinoza
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BugsWorld Project

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  1. BugsWorld Project • The Game • The Simulator • The Language • The Translator

  2. The Game: It’s a BugsWorld!

  3. The Simulator Client Client Server Display Display Client

  4. Simulator Continued… • One server, multiple clients and displays • Server keeps track of world, processes client requests, resolves conflicts • Client simulates creature behavior for all creatures of one species • Display shows current state of world plus some statistics about the simulation • Each process can run on a different computer (distributed simulation)

  5. The Language: BL • The behavior of each species is determined by a program in BL • Primitive instructions: move, turnleft, turnright, infect, skip • Control structures: IF-THEN, IF-THEN-ELSE, WHILE-DO • Defining new instructions: INSTRUCTION-IS • Conditions: test whether next cell is empty, friend, enemy, or wall (plus true and random)

  6. An Example PROGRAM TryToGuess IS INSTRUCTION FindObstacle IS WHILE next-is-empty DO move END WHILE END FindObstacle BEGIN # TryToGuess WHILE true DO FindObstacle IF next-is-enemy THEN infect ELSE IF next-is-wall THEN turnleft ELSE # next-is-friend skip END IF END IF END WHILE END TryToGuess

  7. Language Continued… • Precise syntax • Case sensitive • Matching ENDs • Comments • Identifiers • start with ‘a’..’z’,’A’..’Z’ • followed by any of ‘a’..’z’,’A’..’Z’,’0’..’9’,’-’

  8. The Translator PROGRAM TryToGuess IS INSTRUCTION FindObstacle IS WHILE next-is-empty DO move END WHILE END FindObstacle BEGIN # TryToGuess WHILE true DO FindObstacle IF next-is-enemy THEN infect ELSE IF next-is-wall THEN turnleft ELSE # next-is-friend skip END IF END IF END WHILE END TryToGuess <20, 15, 20, 6, 7, 0, 5, 2, 12, 12, 3, 5, 18, 8, 17, 1, 5, 18, 4, 5, 0>

  9. Code Generator Tokenizer Parser Translator Continued… string of characters (source code) string of tokens string of integers (object code) abstract program

  10. What You Will Do • Build the translator • Implement abstract program component (Lab#2, Closed Lab #4) • Implement parser extension (Lab #3) • Implement code generator extension (Lab #4) • Implement tokenizer component (Lab #5) • Complete the client • Implement interpreter (Closed Lab #6)

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