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CS590VC - Tutorial 3

Learn LSL basics, create a door in Second Life, and automate its opening and closing through script programming. Explore states, events, and common LSL types. Reference helpful guides and videos.

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CS590VC - Tutorial 3

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  1. CS590VC - Tutorial 3 Linden Scripting Language (LSL)

  2. Getting started ……. • Create a box on the ground • Select the box by clicking it • Select Content tab of Build window -> new script • Save the code that you write in the editor. • The code will try to get compiled and then saved.

  3. Scripting language that runs on server side • The running platform is a piece of software called simulator. • Compilation into LSL bytecode • Two basic concepts – states and events

  4. LSL types • Common types such as integer, float, string • Group types: vector, list (no array for LSL) • Position types: rotation • UUID type: key

  5. Positioning type - rotation • Quaternion rotation – x, y, z and s components • Example: rotation rot = <0.0, 0.0, 0.0, 1.0>; http://lslwiki.net/lslwiki/wakka.php?wakka=rotation

  6. Some scripting basics • We start with a default state (multiple states are common) • Event-based programming – hence event handlers • Default event handlers: state_entry & touch_start • Lot of library functions are available (starts with “ll*****”) http://lslwiki.net/lslwiki/wakka.php?wakka=HomePage

  7. Lets do something….. • We first build a door • We then program it to make it open and close using LSL • You can find the tutorial video at http://www.youtube.com/watch?v=5CuqWC-1w88

  8. Step 1: Create a slab & make copy (click and press shift -> drag)

  9. Step 2: Create another copy & rotate slab

  10. Step 3: position the slab that was rotated at the center of the pillars & increase the length as shown

  11. Step 4: Make a copy of the left pillar (“the door”) and position that at the center

  12. Step 5:a) Make another copy of the left pillar (position that a little left as highlighted in the shot)b) shift + cntrl -> you get the red buttons

  13. Step 6: click the button and drag left to create a thin hinge for your door

  14. Step 7: Link the door and the hinge by clicking both of them using shift & then cntrl + L

  15. Step 8: bring the left pillar back & rotate the door -90 degree using the profile editor

  16. Our door is created!!We will now automate the opening and closing of the door

  17. Step 9: Open the script editor

  18. Step 10: Use this code in the editor default { touch_start(integer total_number) { rotation rot = llGetLocalRot(); // string z = (string)rot.z; // string s = (string)rot.s; // llsay(0, “z = ” + z + “s = ” + s); if (rot.z == 0) { rot.z = -0.707107; rot.s = 0.707107; } else { rot.z = 0; rot.s = 1; } llSetLocalRot(rot); } }

  19. References • http://www.slbuilding.com/ - some very good scripting videos and source-code • Second Life – the official guide (2nd ed.)

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