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LSL : L inden S cripting L anguage

LSL : L inden S cripting L anguage. Andrew Orr 12/17/07. “Object”-Oriented. LSL is a high-level scripting language Developed by Linden Labs for their virtual world Second Life. Simple, powerful language used to attach behaviors to the objects. Purpose of LSL.

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LSL : L inden S cripting L anguage

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  1. LSL:Linden Scripting Language Andrew Orr 12/17/07

  2. “Object”-Oriented • LSL is a high-level scripting language • Developed by Linden Labs for their virtual world Second Life. • Simple, powerful language used to attach behaviors to the objects

  3. Purpose of LSL • Control the behavior and interaction of objects within Second Life • Allows internet communication through HTML requests and email • Users create scripts to enhance their products that they make available to other SL residents

  4. LSL is very similar in syntax to C/C++ and Java, and is compiled into byte code much like Java • LSL is state-event driven language • Event triggers: collisions with other objects, movement, chat commands from users, email, timers, etc.

  5. Functions There are approximately 300 preset library functions, but users can also define their own functions. • All Linden library functions begin with ll, eg. llSay(0, “Shoulda had take home exam!”);

  6. Script Facts • Each script executes within its own chunk of the simulator’s memory. • Each script is given a slice of time from a set amount of time given to scripts in a simulator. • Multiple scripts can be attached to an object to allow for complex behaviors.

  7. Data Structures • Integers • Floats • Strings • Vectors (used for position, direction, colors) • Rotations (quaternions) • Lists

  8. Example Script default { state_entry() { llSay(0, "Hello, Avatar!"); } touch(integer total_number) //executes when an avatar { //touches the object. llSay(0, "Touched."); } }

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