Position - Revision history

Lou Montana: Text replacement - "{{Feature | Important | " to "{{Feature|important|"

2024-05-16T20:46:45Z

Text replacement - "{{Feature | Important | " to "{{Feature|important|"

← Older revision		Revision as of 22:46, 16 May 2024
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	\|}		\|}
	<br>		<br>
	{{Feature \| ~~Important~~ \| Note that the only '''absolute position format''' in Arma for 3D calculations is the ASL format. Always pay attention to this fact when performing 3D calculations. For example, when a unit is climbing a mountain, the Z in ATL format is '''always 0'''. The following example demonstrates this behavior:<br>		{{Feature\|important\|Note that the only '''absolute position format''' in Arma for 3D calculations is the ASL format. Always pay attention to this fact when performing 3D calculations. For example, when a unit is climbing a mountain, the Z in ATL format is '''always 0'''. The following example demonstrates this behavior:<br>
	Let's say it is desired to see if there is an intersection between two horizontal positions:		Let's say it is desired to see if there is an intersection between two horizontal positions:
	<sqf>		<sqf>

Lou Montana: Add getRelPos link

2024-04-09T19:16:12Z

Add getRelPos link

← Older revision		Revision as of 21:16, 9 April 2024
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	'''See also:'''		'''See also:'''
	[[positionCameraToWorld]], [[selectionPosition]], [[attachTo]], [[modelToWorld]], [[worldToModel]], [[modelToWorldVisual]], [[worldToModelVisual]], [[camPrepareRelPos]], [[camSetRelPos]]		[[getRelPos]], [[positionCameraToWorld]], [[selectionPosition]], [[attachTo]], [[modelToWorld]], [[worldToModel]], [[modelToWorldVisual]], [[worldToModelVisual]], [[camPrepareRelPos]], [[camSetRelPos]]

	=== PositionConfig ===		=== PositionConfig ===

Lou Montana: Some wiki formatting

2024-02-11T23:36:39Z

Some wiki formatting

← Older revision		Revision as of 01:36, 12 February 2024
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	private _pos1 = getPosASL _unit;		private _pos1 = getPosASL _unit;
	private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y		private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y
	private _intersects = lineIntersects [_pos1, _pos2];		private _intersects = lineIntersects [_pos1, _pos2];
	</sqf>		</sqf>
	}}		}}
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	</sqf>		</sqf>

	Alternatively, [[setVehiclePosition]] can be used. It will put the object onto the nearest surface.		Alternatively, [[setVehiclePosition]] can be used. It will put the object onto the nearest surface.
	<sqf>		<sqf>
	// This will place the player inside Cargo HQ on Stratis:		// This will place the player inside Cargo HQ on Stratis:

Lou Montana: Text replacement - "[[Image:" to "[[File:"

2023-11-20T22:10:57Z

Text replacement - "[[Image:" to "[[File:"

← Older revision		Revision as of 00:10, 21 November 2023
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	== Types ==		== Types ==

	[[~~Image~~:position.jpg\|right\|thumb\|400px\|A comparison of most common formats, where each curve shows the reference height (Z = 0) for that format. Notice that the ASL format is absolute, i.e. its reference height doesn't change from one place to another, unlike other formats. For example, an object on a mountain and an object at the bottom of the sea both have an ATL height equal to 0.]]		[[File:position.jpg\|right\|thumb\|400px\|A comparison of most common formats, where each curve shows the reference height (Z = 0) for that format. Notice that the ASL format is absolute, i.e. its reference height doesn't change from one place to another, unlike other formats. For example, an object on a mountain and an object at the bottom of the sea both have an ATL height equal to 0.]]
	There are a number of formats available in [[Real Virtuality]]:		There are a number of formats available in [[Real Virtuality]]:
	{\|		{\|
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	Over land, Z is measured as height over terrain level minus the height of surface over terrain level underneath. If such surface exists and is counted in, the resulting Z becomes 0.		Over land, Z is measured as height over terrain level minus the height of surface over terrain level underneath. If such surface exists and is counted in, the resulting Z becomes 0.

	[[~~Image~~:z.jpg\|center\|frame\|Obtaining Z for a unit standing on a rock]]		[[File:z.jpg\|center\|frame\|Obtaining Z for a unit standing on a rock]]

	Over sea it gets even more complicated as instead of [[Position#PositionATL\|PositionATL]], [[Position#PositionASLW\|PositionASLW]] is used minus the offset for the surface height, presumably over waves too, as Z seems static. As there is currently no way to obtain H<sub>surface</sub>, it becomes impossible to convert given [[Position#PositionAGLS\|PositionAGLS]] into other formats, unlike with other position formats.		Over sea it gets even more complicated as instead of [[Position#PositionATL\|PositionATL]], [[Position#PositionASLW\|PositionASLW]] is used minus the offset for the surface height, presumably over waves too, as Z seems static. As there is currently no way to obtain H<sub>surface</sub>, it becomes impossible to convert given [[Position#PositionAGLS\|PositionAGLS]] into other formats, unlike with other position formats.

Lou Montana: Fix Wikipedia link

2023-02-24T00:04:34Z

Fix Wikipedia link

← Older revision		Revision as of 02:04, 24 February 2023
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	While the Z-coordinate is always the height/altitude, the point relative to which that height is measured depends on the specific position format (see {{Link\|#Types}} below).		While the Z-coordinate is always the height/altitude, the point relative to which that height is measured depends on the specific position format (see {{Link\|#Types}} below).

	{{Feature\|arma3\|Since {{arma3}} v1.94: X, Y and Z are limited to values between -50km and +500km. Using any '''setPos*''' command with values greater than that will {{~~Wikipedia~~\|~~Clamping~~ (graphics)\|clamp}} the value to within these boundaries, not throwing any errors. e.g:		{{Feature\|arma3\|Since {{arma3}} v1.94: X, Y and Z are limited to values between -50km and +500km. Using any '''setPos*''' command with values greater than that will {{Link\|https://en.wikipedia.org/wiki/Clamping_(graphics)\|clamp}} the value to within these boundaries, not throwing any errors. e.g:
	<sqf>player setPosASL [-50001, 500001, 500001]; // player will be set to [-50000, 500000, 500000]</sqf>}}		<sqf>player setPosASL [-50001, 500001, 500001]; // player will be set to [-50000, 500000, 500000]</sqf>}}

Leopard20: minor additions to a note about absolute coords

2022-08-24T18:41:16Z

minor additions to a note about absolute coords

← Older revision		Revision as of 20:41, 24 August 2022
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	<sqf>		<sqf>
	private _pos1 = getPosATL _unit;		private _pos1 = getPosATL _unit;
	private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y		private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y, so z remains the same
	private _intersects = ~~lineIntersectsSurfaces~~ [ATLToASL _pos1, ATLToASL _pos2];		private _intersects = lineIntersects [ATLToASL _pos1, ATLToASL _pos2]; // lineIntersects needs ASL, so we just convert _pos1 and _pos2 to ASL...
	</sqf>		</sqf>
	However, this is incorrect. ATL is a relative format, and while the ATL height between the coordinates is the same, the ASL height might not be (think of the mountain example again). <br>		However, this is incorrect. ATL is a relative format, and while the ATL height between the coordinates is the same, the ASL height might not be (think of the mountain example again). <br>
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	private _pos1 = getPosASL _unit;		private _pos1 = getPosASL _unit;
	private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y		private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y
	private _intersects = ~~lineIntersectsSurfaces~~ [_pos1, _pos2];		private _intersects = lineIntersects [_pos1, _pos2];
	</sqf>		</sqf>
	}}		}}

Lou Montana: Text replacement - "AGLtoASL" to "AGLToASL"

2022-07-29T17:26:18Z

Text replacement - "AGLtoASL" to "AGLToASL"

← Older revision		Revision as of 19:26, 29 July 2022
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	Similar to [[Position#PositionASL\|PositionASL]], however Z is measured from the sea level to the the model centre {{hl\|[0, 0, 0]}} of the object, rather than transformed [[boundingCenter]] or land contact vertices.		Similar to [[Position#PositionASL\|PositionASL]], however Z is measured from the sea level to the the model centre {{hl\|[0, 0, 0]}} of the object, rather than transformed [[boundingCenter]] or land contact vertices.
	<sqf>_identical = getPosWorld _obj isEqualTo ~~AGLtoASL~~ (_obj modelToWorld [0,0,0]); // should be true</sqf>		<sqf>_identical = getPosWorld _obj isEqualTo AGLToASL (_obj modelToWorld [0,0,0]); // should be true</sqf>

	'''See also:'''		'''See also:'''

Lou Montana: Text replacement - "ATLtoASL" to "ATLToASL"

2022-07-29T17:26:02Z

Text replacement - "ATLtoASL" to "ATLToASL"

← Older revision		Revision as of 19:26, 29 July 2022
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	private _pos1 = getPosATL _unit;		private _pos1 = getPosATL _unit;
	private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y		private _pos2 = _pos1 vectorAdd [0,200,0]; // make a horizontal line by shifting the y
	private _intersects = lineIntersectsSurfaces [~~ATLtoASL~~ _pos1, ~~ATLtoASL~~ _pos2];		private _intersects = lineIntersectsSurfaces [ATLToASL _pos1, ATLToASL _pos2];
	</sqf>		</sqf>
	However, this is incorrect. ATL is a relative format, and while the ATL height between the coordinates is the same, the ASL height might not be (think of the mountain example again). <br>		However, this is incorrect. ATL is a relative format, and while the ATL height between the coordinates is the same, the ASL height might not be (think of the mountain example again). <br>

Lou Montana: Some wiki formatting

2022-06-29T21:21:08Z

Some wiki formatting

Show changes

Lou Montana: Text replacement - "PositionWorld" to "PositionWorld"

2022-01-05T16:04:11Z

Text replacement - "PositionWorld" to "PositionWorld"

← Older revision		Revision as of 18:04, 5 January 2022
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	\| '''Config:''' \|\| Position used in configs		\| '''Config:''' \|\| Position used in configs
	\|-		\|-
	\| '''Object:''' \|\| When object is used for position, [[PositionWorld]] of the object is used		\| '''Object:''' \|\| When object is used for position, [[Position#PositionWorld\|PositionWorld]] of the object is used
	\|-		\|-
	\| '''Visual:''' \|\| Used for rendering objects on the screen. Useful for per-frame applications, such as [[drawIcon3D]]		\| '''Visual:''' \|\| Used for rendering objects on the screen. Useful for per-frame applications, such as [[drawIcon3D]]