PRIM POINT LIGHT

The integer constant PRIM_POINT_LIGHT has the value 23

PRIM_POINT_LIGHT is used to configure the point light configuration of the prim

When used with llSetPrimitiveParams & llSetLinkPrimitiveParams

Returns the list [ integer boolean, vector color, float intensity, float radius, float falloff ]

Be extremely frugal with LIGHTS! The Second Life viewer is limited to rendering no more than 6 at one time, and each contributes to rendering lag. (OpenGL limitations allow for 8 light sources, SL appears to reserve one each for the Sun and Moon.)

If you need to simulate the effect of several light sources, consider using GLOW and FULL_BRIGHT instead.

Constants

Functions

Events

 
// simple light source demonstrator
// 8feb07 "tetsumo kuri"
// thanks to squee janitor for line to dissect
 
integer light_s = TRUE;     //  "_s" for status
 
default
{
    state_entry()
    {
      //  llSetText("click me",<1,0,0.6>,.5);  // in case you like labels
    }
 
    touch_start(integer total_number)
    {
        if ( light_s )
        { 
            light_s = FALSE;
 
            // fullbright doesn't have anything to do with light in NEW(2006?) lighting model 
            // setting fullbright does look good though
            llSetPrimitiveParams([PRIM_FULLBRIGHT,ALL_SIDES,FALSE]);
 
            llSetPrimitiveParams([PRIM_POINT_LIGHT, FALSE,   // if this is false, light is off,
                                     <0.0,1.0,0.0>,1.0, 10.0, 0.5]); // rest of params don't matter
        }            
        else
        {
            light_s = TRUE;
            //llSetPrimitiveParams([PRIM_FULLBRIGHT,ALL_SIDES,TRUE]);   //leave fullbright commented for now
            llSetPrimitiveParams([PRIM_POINT_LIGHT,TRUE,
                                    <1.0,0.7,1.0>,  // light color vector range: 0.0-1.0 *3
                                    1.0,            // intensity    (0.0-1.0)
                                    10.0,           // radius       (.1-20.0)
                                    0.6 ]);         // falloff      (.01-2.0)
 
            // this could have been done in one line, like this     
            //llSetPrimitiveParams([PRIM_FULLBRIGHT,ALL_SIDES,FALSE,PRIM_POINT_LIGHT,TRUE,<1.0,1.0,0.5>,20,1.0,0.5]);
            //      ... but thats kinda hard to take in...       
        }
        //llSay(0, " Click!");
    }
}