LlSetAlpha

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Summary

Function: llSetAlpha( float alpha, integer face );

Sets the alpha on face

• float alpha from 0.0 (clear) to 1.0 (solid) (0.0 <= alpha <= 1.0)
• integer face face number or ALL_SIDES

If face is ALL_SIDES then the function works on all sides.

Caveats

  • The function silently fails if its face value indicates a face that does not exist.
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Examples

float cloakSpeed = 0.1;
 
default
{
    touch_end(integer total_number)
    {
        float alpha = 1.0;
        while(alpha > 0.0)
        {
            alpha -= 0.1;
            llSetAlpha(alpha, ALL_SIDES);
            llSleep(cloakSpeed);
        }
        state cloaked;
    }
}
 
state cloaked
{
    touch_end(integer total_number)
    {
        float alpha;
        while (alpha < 1.0)
        {
            alpha += 0.1;
            llSetAlpha(alpha, ALL_SIDES);
            llSleep(cloakSpeed);
        }
        state default;
    }
}

Notes

In practical terms, "alpha" means "transparency" or "visibility".

To be clear, llSetAlpha will only affect the prim that the script it is in. It will not affect any linked prims. To set the alpha state for those, use llSetLinkAlpha

See Also

Events

•  changed CHANGED_COLOR

Functions

•  llGetAlpha Gets the prim's alpha
•  llGetColor Gets the prim's color
•  llSetColor Sets the prim's color
•  llSetLinkColor Sets link's color
•  llSetLinkAlpha Sets link's alpha

Articles

•  Translucent Color

Deep Notes

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Signature

function void llSetAlpha( float alpha, integer face );