User:Toady Nakamura/Two States Light

Using two states can sometimes be an elegant solution to on/off.

• Original framework 04-16-08 by Toady Nakamura
• Light call modified from Simon Kline's classes "Scripting from Scratch"

vector color = <1.0, 1.0, 1.0>;  // Use to change the color of the light
float intensity = 1.0;   // Use to change the intensity of the light, from 0 up to 1
float radius = 10.0;     //  Use to change the Radius of the light, from 0 up to 20
float falloff = 0.75;    //  Use to set the falloff of the light, from 0 up to 2

default 
{ 
     
    touch_start(integer total_number) 
    { 
        llSetPrimitiveParams([PRIM_POINT_LIGHT, TRUE, color, intensity, radius, falloff]);
        llSetPrimitiveParams([PRIM_FULLBRIGHT, ALL_SIDES, TRUE]);
        state unlit; 
    } 
} 

state unlit 
{ 
    touch_start(integer total_number) 
    { 
        llSetPrimitiveParams([PRIM_POINT_LIGHT, FALSE, color, intensity, radius, falloff]);                               
        llSetPrimitiveParams([PRIM_FULLBRIGHT, ALL_SIDES, FALSE]);
        state default; 
    } 

    on_rez(integer param)
    {
        llResetScript();
    }
}

Another way to do the same thing

After this script was posted an "expert" scriptor came along and changed it. Since their new version has no explanatory notes, and no longer matches the in world student notes, I have reverted the original version and appended their version here. It does exactly the same thing, but is considered by the person changing these pages to be "better."

vector color = <1.0, 1.0, 1.0>;
float intensity = 1.000;// from 0.0 up to 1.0
float radius = 10.000;//  from 0.0 up to 20.0
float falloff = 0.750;//  from 0.0 up to 2.0
 
default
{
    on_rez(integer start_param)
    {
        llResetScript();
    }
 
    touch_start(integer num_detected)
    {
        llSetLinkPrimitiveParamsFast(LINK_THIS,
            [PRIM_POINT_LIGHT, TRUE, color, intensity, radius, falloff,
            PRIM_FULLBRIGHT, ALL_SIDES, TRUE]);
 
        state lightOn;
    }
}
 
state lightOn
{
    on_rez(integer start_param)
    {
        llResetScript();
    }
 
    touch_start(integer num_detected)
    {
        llSetLinkPrimitiveParamsFast(LINK_THIS,
            [PRIM_POINT_LIGHT, FALSE, color, intensity, radius, falloff,
            PRIM_FULLBRIGHT, ALL_SIDES, FALSE]);
 
        state default;
    }
}