Difference between revisions of "Category:LSL User-Defined Functions"
Kireji Haiku (talk | contribs) (added two examples, one with void return type, one with boolean return type) |
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return value_of_return_type; | return value_of_return_type; | ||
} | } | ||
</lsl> | |||
<lsl> | |||
// example with void return type: | // example with void return type: | ||
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} | } | ||
} | } | ||
</lsl> | |||
<lsl> | |||
// example with integer return type (actually it's a boolean) | // example with integer return type (actually it's a boolean) | ||
Revision as of 11:48, 30 September 2012
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User-Defined Functions
This category contains custom pre-defined function contributions from the LSL community to extend the abilities of LSL. To add a wiki page to this category, include a link to this page. You may use the Template:LSL_Function (with "mode" set to user) to create the page to be added here.
Go to the Functions page to view the built-in functions.
About User-Defined Functions
LSL allows user-defined functions. The syntax is very simple:
<lsl> return_type variable_name(par1type par1name, par2type par2name,...) {
function_statements; . . . return value_of_return_type;
} </lsl> <lsl> // example with void return type:
let_prim_say_something_and_include_owner_info(string message) {
key ownerKey = llGetOwner(); string ownerName = llKey2Name(ownerKey);
llSay(PUBLIC_CHANNEL, "/me (owned by " + ownerName + "): " + message);
}
default {
state_entry()
{
let_prim_say_something_and_include_owner_info("Hello world!");
}
} </lsl> <lsl> // example with integer return type (actually it's a boolean)
integer is_sun_up() {
vector sunDirection = llGetSunDirection();
if (sunDirection.z < 0.0)
return FALSE;
// else
return TRUE;
}
default {
state_entry()
{
if ( is_sun_up() )
llSay(PUBLIC_CHANNEL, "Good day!");
else
llSay(PUBLIC_CHANNEL, "Good night!");
}
} </lsl>
There are no "function" or "def" keywords or function type/inheritance specifiers needed. I have not yet discovered what limits (if any) exist on the length or composition of the parameter list. Multiple types can be used, as shown in the example below. A list can be returned, so a single function can return a list with several values in it. User-defined functions will help keep scripts compact and readable, and allow rudimentary code reuse. The LSL_Style_Guide suggests that user-defined functions should be placed before the default state definition and after user-defined variables. Placing user-defined functions after the first state will result in a Syntax Error.
examples can be found linked below
Pages in category "LSL User-Defined Functions"
The following 65 pages are in this category, out of 65 total.