LlGetSunDirection

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(Différences entre les versions)
(Page créée avec « <lsl> integer lightsOn = -1;//not TRUE or FALSE CheckSun() { vector sun = llGetSunDirection(); integer turnLightsOn = (sun.z < 0); if(turnLightsOn != lightsOn) … »)
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<table border="1" cellspacing="0">
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<tr align="center" valign="top" class="tab_title"><td style="padding-left:3px;padding-right:3px"> <b>Phase</b> </td><td style="padding-left:3px;padding-right:3px"> <b>PST</b> </td><td style="padding-left:3px;padding-right:3px"> <b>PDT</b> </td><td style="padding-left:3px;padding-right:3px"> <b>GMT</b> </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 2:30 AM </td><td style="padding-left:3px;padding-right:3px"> 3:30 AM </td><td style="padding-left:3px;padding-right:3px"> 10:30 </td></tr>
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<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 3:00 AM </td><td style="padding-left:3px;padding-right:3px"> 4:00 AM </td><td style="padding-left:3px;padding-right:3px"> 11:00 </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 3:30 AM </td><td style="padding-left:3px;padding-right:3px"> 4:30 AM </td><td style="padding-left:3px;padding-right:3px"> 11:30 </td></tr>
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<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 6:30 AM </td><td style="padding-left:3px;padding-right:3px"> 7:30 AM </td><td style="padding-left:3px;padding-right:3px"> 14:30 </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 7:00 AM </td><td style="padding-left:3px;padding-right:3px"> 8:00 AM </td><td style="padding-left:3px;padding-right:3px"> 15:00 </td></tr>
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<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 7:30 AM </td><td style="padding-left:3px;padding-right:3px"> 8:30 AM </td><td style="padding-left:3px;padding-right:3px"> 15:30 </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 10:30 AM </td><td style="padding-left:3px;padding-right:3px"> 11:30 AM </td><td style="padding-left:3px;padding-right:3px"> 18:30 </td></tr>
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<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 11:00 AM </td><td style="padding-left:3px;padding-right:3px"> 12:00 PM </td><td style="padding-left:3px;padding-right:3px"> 19:00 </td></tr>
 +
<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 11:30 AM </td><td style="padding-left:3px;padding-right:3px"> 12:30 PM </td><td style="padding-left:3px;padding-right:3px"> 19:30 </td></tr>
 +
<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 2:30 PM </td><td style="padding-left:3px;padding-right:3px"> 3:30 PM </td><td style="padding-left:3px;padding-right:3px"> 22:30 </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 3:00 PM </td><td style="padding-left:3px;padding-right:3px"> 4:00 PM </td><td style="padding-left:3px;padding-right:3px"> 23:00 </td></tr>
 +
<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 3:30 PM </td><td style="padding-left:3px;padding-right:3px"> 4:30 PM </td><td style="padding-left:3px;padding-right:3px"> 23:30 </td></tr>
 +
<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 6:30 PM </td><td style="padding-left:3px;padding-right:3px"> 7:30 PM </td><td style="padding-left:3px;padding-right:3px"> 2:30 </td></tr>
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<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 7:00 PM </td><td style="padding-left:3px;padding-right:3px"> 8:00 PM </td><td style="padding-left:3px;padding-right:3px"> 3:00 </td></tr>
 +
<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 7:30 PM </td><td style="padding-left:3px;padding-right:3px"> 8:30 PM </td><td style="padding-left:3px;padding-right:3px"> 3:30 </td></tr>
 +
<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunset</b> </td><td style="padding-left:3px;padding-right:3px"> 10:30 PM </td><td style="padding-left:3px;padding-right:3px"> 11:30 PM </td><td style="padding-left:3px;padding-right:3px"> 6:30 </td></tr>
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<tr class="tab_row_uneven"><td style="padding-left:3px;padding-right:3px"> <b>Midnight</b> </td><td style="padding-left:3px;padding-right:3px"> 11:00 PM </td><td style="padding-left:3px;padding-right:3px"> 12:00 AM </td><td style="padding-left:3px;padding-right:3px"> 7:00 </td></tr>
 +
<tr class="tab_row_even"><td style="padding-left:3px;padding-right:3px"> <b>Sunrise</b> </td><td style="padding-left:3px;padding-right:3px"> 11:30 PM </td><td style="padding-left:3px;padding-right:3px"> 12:30 AM </td><td style="padding-left:3px;padding-right:3px"> 7:30 </td></tr>
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</table>
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One possible application for this function is to determine whether it's day- or nighttime. The following script simply uses the z-axis of the sun's vector to find out if the sun is above or below the horizon:
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<lsl>
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integer night=0; // 0 = daytime, 1 = nighttime
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 +
default
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{
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    state_entry()
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    {
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        llSetTimerEvent(300); // Check every 5 minutes
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    }
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    timer()
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    {
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        vector sun = llGetSunDirection();
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        if (sun.z <= 0) night = 1; // Sun is below the horizon
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        else if (sun.z > 0) night = 0; // Sun is above the horizon
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    }
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    touch_start(integer total_number)
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    {
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        if (night == 1) llSay(0, "It's nighttime.");
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        else if (night == 0) llSay(0, "It's daytime.");
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    }
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}
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</lsl>
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 +
If the complete script is to behave different at night, an additional script state may be a better solution than checking a variable:
 +
<lsl>
 +
default // daytime state
 +
{
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    state_entry()
 +
    {
 +
        llSetTimerEvent(180); // Check every 3 minutes
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    }
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    timer()
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    {
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        vector sun = llGetSunDirection();
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        if (sun.z < 0) state night;
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    }
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    touch_start(integer total_number)
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    {
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        llSay(0, "It's daytime.");
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    }   
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}
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state night
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{
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    state_entry()
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    {
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        llSetTimerEvent(180); // Check every 3 minutes
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    }
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    timer()
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    {
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        vector sun = llGetSunDirection();
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        if (sun.z > 0) state default; // Change back to daytime state
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    }
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    touch_start(integer total_number)
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    {
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        llSay(0, "It's nighttime.");
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    }
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}
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</lsl>
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 +
Rotating the object to follow the path of the sun during day time and return to a default position at night:
 +
<lsl>
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vector sun;
 +
 +
default
 +
{
 +
    state_entry()
 +
    {
 +
        llSetTimerEvent(300); // Check every 5 minutes
 +
    }
 +
    timer()
 +
    {
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        vector sun = llGetSunDirection();
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        if (sun.z <= 0) { // If it is night, return to default position
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            llSetRot( <0, 0, 0, 0> );
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        } else if (sun.z > 0) {
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            rotation sunRot = ZERO_ROTATION; // Set the rotation to NULL
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            if (sun.z >= 0.0) { // If it is day, set rotation towards the sun
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                sunRot = llAxes2Rot(<sun.x, sun.y, 0.0>, <-sun.y, sun.x, 0.0>, <0.0, 0.0, 1.0>);
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            }
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            llSetRot(sunRot);
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        }       
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    }
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}
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</lsl>
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 +
This can be used to quickly determine whether it is day or night (in shortened SL days) as the script runs: if the returned vector's Z element is positive, then the sun is above the horizon.
<lsl>
<lsl>
integer lightsOn = -1;//not TRUE or FALSE
integer lightsOn = -1;//not TRUE or FALSE

Version du 16 octobre 2012 à 20:01

Phase PST PDT GMT
Sunset 2:30 AM 3:30 AM 10:30
Midnight 3:00 AM 4:00 AM 11:00
Sunrise 3:30 AM 4:30 AM 11:30
Sunset 6:30 AM 7:30 AM 14:30
Midnight 7:00 AM 8:00 AM 15:00
Sunrise 7:30 AM 8:30 AM 15:30
Sunset 10:30 AM 11:30 AM 18:30
Midnight 11:00 AM 12:00 PM 19:00
Sunrise 11:30 AM 12:30 PM 19:30
Sunset 2:30 PM 3:30 PM 22:30
Midnight 3:00 PM 4:00 PM 23:00
Sunrise 3:30 PM 4:30 PM 23:30
Sunset 6:30 PM 7:30 PM 2:30
Midnight 7:00 PM 8:00 PM 3:00
Sunrise 7:30 PM 8:30 PM 3:30
Sunset 10:30 PM 11:30 PM 6:30
Midnight 11:00 PM 12:00 AM 7:00
Sunrise 11:30 PM 12:30 AM 7:30

One possible application for this function is to determine whether it's day- or nighttime. The following script simply uses the z-axis of the sun's vector to find out if the sun is above or below the horizon: 

integer night=0; // 0 = daytime, 1 = nighttime
 
default
{
    state_entry()
    {
        llSetTimerEvent(300); // Check every 5 minutes
    }
    timer()
    {
        vector sun = llGetSunDirection();
        if (sun.z <= 0) night = 1; // Sun is below the horizon
        else if (sun.z > 0) night = 0; // Sun is above the horizon
    }
    touch_start(integer total_number)
    {
        if (night == 1) llSay(0, "It's nighttime.");
        else if (night == 0) llSay(0, "It's daytime.");
    }
}

If the complete script is to behave different at night, an additional script state may be a better solution than checking a variable: 

default // daytime state
{
    state_entry()
    {
        llSetTimerEvent(180); // Check every 3 minutes
    }
    timer() 
    { 
        vector sun = llGetSunDirection(); 
        if (sun.z < 0) state night; 
    }
    touch_start(integer total_number)
    {
        llSay(0, "It's daytime.");
    }    
}
 
state night
{ 
    state_entry() 
    { 
        llSetTimerEvent(180); // Check every 3 minutes
    } 
    timer() 
    { 
        vector sun = llGetSunDirection(); 
        if (sun.z > 0) state default; // Change back to daytime state
    } 
    touch_start(integer total_number)
    {
        llSay(0, "It's nighttime.");
    }
}

Rotating the object to follow the path of the sun during day time and return to a default position at night: 

vector sun;
 
default
{
    state_entry()
    {
        llSetTimerEvent(300); // Check every 5 minutes
    }
    timer()
    {
        vector sun = llGetSunDirection();
 
        if (sun.z <= 0) { // If it is night, return to default position
            llSetRot( <0, 0, 0, 0> );
        } else if (sun.z > 0) {
            rotation sunRot = ZERO_ROTATION; // Set the rotation to NULL 
 
            if (sun.z >= 0.0) { // If it is day, set rotation towards the sun
                sunRot = llAxes2Rot(<sun.x, sun.y, 0.0>, <-sun.y, sun.x, 0.0>, <0.0, 0.0, 1.0>);
            }
            llSetRot(sunRot);
        }        
    }
}

This can be used to quickly determine whether it is day or night (in shortened SL days) as the script runs: if the returned vector's Z element is positive, then the sun is above the horizon. 

integer lightsOn = -1;//not TRUE or FALSE
 
CheckSun()
{
    vector sun = llGetSunDirection();
    integer turnLightsOn = (sun.z < 0);
    if(turnLightsOn != lightsOn)
    {
        lightsOn = turnLightsOn;
        llSetPrimitiveParams([ PRIM_FULLBRIGHT, ALL_SIDES, lightsOn ]);
    }
}
Récupérée de « http://digigrids.free.fr/wiki/index.php?title=LlGetSunDirection »
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