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 = ; 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=5CuqW C-1w88 http://www.youtube.com/watch?v=5CuqW C-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-codehttp://www.slbuilding.com/ Second Life – the official guide (2 nd ed.)