findEmptyPosition: Difference between revisions
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Lou Montana (talk | contribs) (Fix description) |
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{{ | {{RV|type=command | ||
| arma2 |= | |game1= arma2 | ||
|version1= 1.00 | |||
|1. | |game2= arma2oa | ||
|version2= 1.50 | |||
| | |game3= tkoh | ||
|version3= 1.00 | |||
|game4= arma3 | |||
|version4= 0.50 | |||
| | |gr1= Positions | ||
| | |descr= Searches for an empty area around the specified position, starting from the ''center'' looking for an empty ''areaRadius'' and looks as far away as ''areaRadius'' + ''maxDistance''. | ||
This command ignores moving objects present within the search area. The search area can be preloaded with [[findEmptyPositionReady]] command. | |||
| [[Array]] - | {{Feature|informative| | ||
This command does not work outside of [[worldSize|world dimensions]] and will always return the provided ''center''. | |||
Objects outside the world dimensions will not be considered in the detection either. | |||
}} | |||
|s1= center [[findEmptyPosition]] [areaRadius, maxDistance, vehicleType] | |||
|p1= center: [[Array]] format [[Position#Introduction|Position2D]] or [[Position#Introduction|Position3D]] - search area center position in format [x,y] or [x,y,z] in which case z is ignored | |||
|p2= areaRadius: [[Number]] - wanted area radius | |||
|p3= maxDistance: [[Number]] - stop searching no further than {{hl|areaRadius + maxDistance}} from the center | |||
|p4= vehicleType: [[String]] - (Optional) classname of a vehicle to accommodate | |||
|r1= [[Array]] - a suitable empty position in format [[Position#Introduction|Position3D]] or empty array <sqf inline>[]</sqf> if not found | |||
|x1= <sqf>_position = getPosASL player findEmptyPosition [0, 100];</sqf> | |||
|x2= <sqf>_position = _center findEmptyPosition [10,100,"UH60M_EP1"];</sqf> | |||
|x3= Check if exact position is empty: | |x3= Check if exact position is empty: | ||
< | <sqf>_position = _center findEmptyPosition [0, 0, "B_Boat_Armed_01_minigun_F"];</sqf> | ||
|seealso= [[findEmptyPositionReady]] [[selectBestPlaces]] [[isFlatEmpty]] [[BIS_fnc_findSafePos]] | |||
}} | |||
| | {{Note | ||
|user= Killzone_Kid | |||
|timestamp= 20131106181000 | |||
|text= Keep search radius short and sweet, under 50 metres maybe. Searching big area takes long time and will result in your game stop responding until the search is over. [[isFlatEmpty]] is probably more suitable for a larger area search. | |||
}} | }} | ||
{{Note | |||
|user= old_man_auz | |||
|timestamp= 20120306005000 | |||
|text= I think the '''radius''' parameter should be treated as a 'minimum distance' from the '''centre''' position. I found that the parameter name '''radius''' was not very clear. Also, if '''radius''' is greater than '''max distance''' then the function will always return an empty array. | |||
I think the '''radius''' parameter should be treated as a 'minimum distance' from the '''centre''' position. I found that the parameter name '''radius''' | |||
Here is an snippet of code I use to find a safe landing zone for an extraction helicopter. It may be useful for someone. | Here is an snippet of code I use to find a safe landing zone for an extraction helicopter. It may be useful for someone. | ||
< | <sqf> | ||
_centre = [getMarkerPos "marker", random 150, random 360] call BIS_fnc_relPos; | |||
_extraction_point = []; | _extraction_point = []; | ||
_max_distance = 100; | _max_distance = 100; | ||
while{ count _extraction_point < 1 } do | while { count _extraction_point < 1 } do | ||
{ | { | ||
_extraction_point = _centre findEmptyPosition[ 30 , _max_distance , "UH60M_EP1" ]; | _extraction_point = _centre findEmptyPosition [30, _max_distance, "UH60M_EP1"]; | ||
_max_distance = _max_distance + 50; | _max_distance = _max_distance + 50; | ||
}; | }; | ||
</ | </sqf> | ||
In the above example, make sure that "_max_distance" is greater than 30, otherwise the while loop will go forever. | In the above example, make sure that "_max_distance" is greater than 30, otherwise the while loop will go forever. | ||
}} | |||
Latest revision as of 00:21, 21 December 2022
Description
- Description:
- Searches for an empty area around the specified position, starting from the center looking for an empty areaRadius and looks as far away as areaRadius + maxDistance. This command ignores moving objects present within the search area. The search area can be preloaded with findEmptyPositionReady command.
- Groups:
- Positions
Syntax
- Syntax:
- center findEmptyPosition [areaRadius, maxDistance, vehicleType]
- Parameters:
- center: Array format Position2D or Position3D - search area center position in format [x,y] or [x,y,z] in which case z is ignored
- areaRadius: Number - wanted area radius
- maxDistance: Number - stop searching no further than areaRadius + maxDistance from the center
- vehicleType: String - (Optional) classname of a vehicle to accommodate
- Return Value:
- Array - a suitable empty position in format Position3D or empty array [] if not found
Examples
- Example 1:
- Example 2:
- Example 3:
- Check if exact position is empty:
Additional Information
Notes
-
Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
- Posted on Nov 06, 2013 - 18:10 (UTC)
- Keep search radius short and sweet, under 50 metres maybe. Searching big area takes long time and will result in your game stop responding until the search is over. isFlatEmpty is probably more suitable for a larger area search.
- Posted on Mar 06, 2012 - 00:50 (UTC)
- I think the radius parameter should be treated as a 'minimum distance' from the centre position. I found that the parameter name radius was not very clear. Also, if radius is greater than max distance then the function will always return an empty array. Here is an snippet of code I use to find a safe landing zone for an extraction helicopter. It may be useful for someone. In the above example, make sure that "_max_distance" is greater than 30, otherwise the while loop will go forever.