LlCollisionFilter - Second Life Wiki

LlCollisionFilter

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Contents

Summary

Function: llCollisionFilter( string name, key id, integer accept );

Sets the collision filter, exclusively or inclusively.

• string name filter for specific object name or avatar legacy name
• key id filter by avatar or object UUID
• integer accept TRUE only process collisions that match, FALSE instead excludes matches

If accept == TRUE, only accept collisions with objects name AND id (either is optional), otherwise with objects not name AND id
If name or id are blank they are not used to filter incoming messages (or you could say they match everything). If id is an invalid key or a null key, it is considered blank.

Caveats

  • Any call of llCollisionFilter in the same event as llVolumeDetect changing (not just being called, but actually moving from FALSE to TRUE or vice versa) will be disregarded (before or after), if the event handler previously called a user-defined function. See #SVC-2490

Important Issues

~ All Issues ~ Search JIRA for related Bugs
   llCollisionFilter completely ignored after call to user-defined function and then a call to llVolumeDetect(TRUE)

Examples

Stop filtering:

llCollisionFilter("", NULL_KEY, TRUE);

Filter out all collisions:

llCollisionFilter("", NULL_KEY, FALSE);

This script, placed in a wearable object, detects a collision when the person wearing it collides with an object named "Post":

  • 1st instance :

an object named "Post" has several child prims named "Object" . The prim named "Post" hits the scripted object or scripted prim , the collision will be detected

  • 2nd instance :

an object named "Post" has several child prims named "Object" . A child prim named "Object" hits the scripted object or scripted prim, the collision will be detected

  • 3rd instance :

an object named "Object" has several child prims named "Post" . A prim named "Post" hits the scripted object or scripted prim, the collision will not be detected

default
{
    state_entry()
    {
        llCollisionFilter("Post","",TRUE);
    }
 
    collision_start(integer total_number)
    {
        llSay(0, "OUCH!");
    }
}

See Also

Events

•  collision_start
•  collision
•  collision_end

Functions

•  llPassCollisions
•  llVolumeDetect

Deep Notes

All Issues

~ Search JIRA for related Issues
   llCollisionFilter completely ignored after call to user-defined function and then a call to llVolumeDetect(TRUE)
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