Difference between revisions of "Path update"
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Pedro Oval (talk | contribs) m (Change category from Pathfinding to LSL_Pathfinding) |
m (Replaced <source> with <syntaxhighlight>) |
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* When the character cannot navigate from the current position (<code>{{LSL Const|PU_FAILURE_INVALID_START|hex=0x02|ihex=2}}</code>) [[llNavigateTo]] with the <code>{{LSL Const|FORCE_DIRECT_PATH|value=1}}</code> option may be helpful. | * When the character cannot navigate from the current position (<code>{{LSL Const|PU_FAILURE_INVALID_START|hex=0x02|ihex=2}}</code>) [[llNavigateTo]] with the <code>{{LSL Const|FORCE_DIRECT_PATH|value=1}}</code> option may be helpful. | ||
|examples= | |examples= | ||
< | <syntaxhighlight lang="lsl2"> | ||
create_wandering_character() | create_wandering_character() | ||
{ | { | ||
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} | } | ||
} | } | ||
</ | </syntaxhighlight> | ||
|also_functions= | |also_functions= | ||
* [[llCreateCharacter]] | * [[llCreateCharacter]] | ||
Latest revision as of 08:45, 12 October 2023
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Description
Event: path_update( integer type, list reserved ){ ; }Event description goes here.
| • integer | type | – | A PU_*, it's the path event type
|
|
| • list | reserved | – | Reserved; not currently used. |
| Constants | Value | Description |
|---|---|---|
| PU_SLOWDOWN_DISTANCE_REACHED | 0x00 | Character is near current goal. |
| PU_GOAL_REACHED | 0x01 | Character has reached the goal and will stop or choose a new goal (if wandering). |
| PU_FAILURE_INVALID_START | 0x02 | Character cannot navigate from the current location - e.g., the character is off the navmesh or too high above it. |
| PU_FAILURE_INVALID_GOAL | 0x03 | Goal is not on the navmesh and cannot be reached. |
| PU_FAILURE_UNREACHABLE | 0x04 | Goal is no longer reachable for some reason - e.g., an obstacle blocks the path. |
| PU_FAILURE_TARGET_GONE | 0x05 | Target (for llPursue or llEvade) can no longer be tracked - e.g., it left the region or is an avatar that is now more than about 30m outside the region. |
| PU_FAILURE_NO_VALID_DESTINATION | 0x06 | There's no good place for the character to go - e.g., it is patrolling and all the patrol points are now unreachable. |
| PU_EVADE_HIDDEN | 0x07 | Triggered when an llEvade character thinks it has hidden from its pursuer. |
| PU_EVADE_SPOTTED | 0x08 | Triggered when an llEvade character switches from hiding to running |
| PU_FAILURE_NO_NAVMESH | 0x09 | This is a fatal error reported to a character when there is no navmesh for the region. This usually indicates a server failure and users should file a bug report and include the time and region in which they received this message. |
| PU_FAILURE_DYNAMIC_PATHFINDING_DISABLED | 0x0A | Triggered when a character enters a region with dynamic pathfinding disabled. Dynamic pathfinding can be toggled by estate managers via the 'dynamic_pathfinding' option in the Region Debug Console. |
| PU_FAILURE_PARCEL_UNREACHABLE | 0x0B | Triggered when a character failed to enter a parcel because it is not allowed to enter, e.g. because the parcel is already full or because object entry was disabled after the navmesh was baked. |
| PU_FAILURE_OTHER | 0xF4240 | Other failure. |
Caveats
- Note that if wandering, the "stop" (
PU_GOAL_REACHED) type may never occur as a new goal may be chosen when near (PU_SLOWDOWN_DISTANCE_REACHED) the previous goal. - When the character cannot navigate from the current position (
PU_FAILURE_INVALID_START) llNavigateTo with theFORCE_DIRECT_PATHoption may be helpful.
Examples
create_wandering_character()
{
// Clear any previous character behaviors
llDeleteCharacter();
// MAX_SPEED is @ 20 by default
llCreateCharacter([
CHARACTER_MAX_SPEED, 25.0,
CHARACTER_DESIRED_SPEED, 15.0]);
llWanderWithin(llGetPos(), <10.0, 10.0, 2.0>, []);
}
list get_pathupdate_failure_info(integer type)
{
if (type == PU_SLOWDOWN_DISTANCE_REACHED)
return ["Near", FALSE];
if (type == PU_GOAL_REACHED)
return ["Stopping", FALSE];
if (type == PU_FAILURE_INVALID_START)
return ["Cannot path find from current location! Attempting "
+ "to go to the center of the region.", TRUE];
if (type == PU_FAILURE_INVALID_GOAL)
return ["Goal not on navmesh!", FALSE];
if (type == PU_FAILURE_UNREACHABLE)
return ["Goal unreachable!", FALSE];
if (type == PU_FAILURE_TARGET_GONE)
return ["Target gone!", FALSE];
if (type == PU_FAILURE_NO_VALID_DESTINATION)
return ["No place to go!", FALSE];
if (type == PU_EVADE_HIDDEN)
return ["Hiding from pursuer...", FALSE];
if (type == PU_EVADE_SPOTTED)
return ["Switched from hiding to running...", FALSE];
if (type == PU_FAILURE_NO_NAVMESH)
return ["Region has no nav mesh..", FALSE];
if (type == PU_FAILURE_DYNAMIC_PATHFINDING_DISABLED)
return ["Dynamic pathfinding is disabled in this region.", FALSE];
if (type == PU_FAILURE_PARCEL_UNREACHABLE)
return ["Parcel entry problem (is the parcel full?).", FALSE];
if (type == PU_FAILURE_OTHER)
return ["Hit an unspecified failure", FALSE];
return ["Unknown failure", FALSE];
}
default
{
on_rez(integer start_param)
{
llResetScript();
}
state_entry()
{
create_wandering_character();
}
path_update(integer type, list reserved)
{
list params = get_pathupdate_failure_info(type);
string info = llList2String(params, 0);
integer /* boolean */ hasToMove = llList2Integer(params, 1);
llInstantMessage(llGetOwner(), info);
if (hasToMove)
{
vector currentPosition = llGetPos();
llNavigateTo(<128.0, 128.0, llGround(<128.0, 128.0, 0.0> - currentPosition)>, [FORCE_DIRECT_PATH, TRUE]);
}
}
}