checkVisibility: Difference between revisions

Latest revision as of 13:25, 10 April 2023

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Description

Description:

Affected by	Not affected by
terrain grid obstacles particles (with `blockAIVisibility = 1`)	daylight distance overcast fog

Checks if one position is visible from another position and how much.

ⓘ

Particles that have blockAIVisibility set to 1 will influence the result, but will never make checkVisibility return 0; an extremely small number will be returned instead.

Groups:

Math - Geometry

Syntax

Syntax:: [ignore, LOD, ignore2] checkVisibility [beg, end]
Parameters:: ignore: Object - object to exclude from calculations
: LOD: String - level of details to use. Possible values are: "FIRE", "VIEW", "GEOM", "IFIRE", and 2.02 "PHYSX"
since 1.62: ignore2: Object - (Optional, default objNull) second object to exclude from calculations
: beg: Array - start position in format PositionASL
: end: Array - end position in format PositionASL
Return Value:: Number - how much end position is visible to start position in range 0..1, where 1 is fully visible.

Examples

Example 1:: private _canSee = [objNull, "VIEW"] checkVisibility [eyePos player, eyePos unit1];

Additional Information

See also:: lineIntersectsWith lineIntersectsSurfaces lineIntersectsObjs intersect terrainIntersect terrainIntersectASL terrainIntersectAtASL lineIntersects cursorObject cursorTarget disableRemoteSensors

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

@@ Line 6: / Line 6: @@
 |gr1= Math - Geometry
-|descr= Checks if one position is visible from another position and how much. The results can be affected by [[getTerrainGrid]] value, especially if position is near the ground. Particle effects such as smoke can also affect the results.
+|descr= {{{!}} class="wikitable float-right"
+! style="width: 50%" {{!}} Affected by
+! Not affected by
+{{!}}-
+{{!}}
+* [[getTerrainGrid|terrain grid]]
+* obstacles
+* particles<br><span style="font-size: .9em">(with <syntaxhighlight lang="cpp" inline>blockAIVisibility = 1</syntaxhighlight>)</span>
+{{!}}
+* [[time|daylight]]
+* [[distance]]
+* [[overcast]]
+* [[fog]]
+{{!}}}
+Checks if one position is visible from another position and how much.
+{{Feature|informative|Particles that have {{hl|blockAIVisibility}} set to 1 will influence the result, but will never make [[checkVisibility]] return 0; an extremely small number will be returned instead.}}
 |s1= [ignore, LOD, ignore2] [[checkVisibility]] [beg, end]
-|p1= [ignore, LOD, ignore2]: [[Array]]
+|p1= ignore: [[Object]] - object to exclude from calculations
-|p2= ignore: [[Object]] - object to exclude from calculations
+|p2= LOD: [[String]] - level of details to use. Possible values are: {{hl|"FIRE"}}, {{hl|"VIEW"}}, {{hl|"GEOM"}}, {{hl|"IFIRE"}}, and {{GVI|arma3|2.02|size= 0.75}} {{hl|"PHYSX"}}
-|p3= LOD: [[String]] - level of details to use. Possible values are: <tt>"FIRE"</tt>, <tt>"VIEW"</tt>, <tt>"GEOM"</tt>, <tt>"IFIRE"</tt>, <tt>"PHYSX"</tt> - PhysX geometry LOD (since Arma 3 v2.01.146666)
+|p3= ignore2: [[Object]] - (Optional, default [[objNull]]) second object to exclude from calculations
+|p3since= arma3 1.62
-|p4= ignore2 (Optional): [[Object]] - second object to exclude from calculations (Since Arma 3 v1.62)
+|p4= beg: [[Array]] - start position in format [[Position#PositionASL|PositionASL]]
-|p5= [beg, end]: [[Array]]
+|p5= end: [[Array]] - end position in format [[Position#PositionASL|PositionASL]]
-|p6= beg: [[Array]] - start position in format [[PositionASL]]
+|r1= [[Number]] - how much end position is visible to start position in range 0..1, where 1 is fully visible.
-|p7= end: [[Array]] - end position in format [[PositionASL]]
-|r1= [[Number]] - how much end position is visible to start position in range 0..1, where 1 is fully visible.
+|x1= <sqf>private _canSee = [objNull, "VIEW"] checkVisibility [eyePos player, eyePos unit1];</sqf>
-|x1= <code>_cansee = [<nowiki/>[[objNull]], "VIEW"] [[checkVisibility]] [<nowiki/>[[eyePos]] [[player]], [[eyePos]] unit1];</code>
+|seealso= [[lineIntersectsWith]] [[lineIntersectsSurfaces]] [[lineIntersectsObjs]] [[intersect]] [[terrainIntersect]] [[terrainIntersectASL]] [[terrainIntersectAtASL]] [[lineIntersects]] [[cursorObject]] [[cursorTarget]] [[disableRemoteSensors]]
-|seealso= [[lineIntersectsWith]], [[lineIntersectsSurfaces]], [[lineIntersectsObjs]], [[intersect]], [[terrainIntersect]], [[terrainIntersectASL]], [[terrainIntersectAtASL]], [[lineIntersects]], [[cursorObject]], [[cursorTarget]], [[disableRemoteSensors]]
 }}
-<dl class="command_description">
-<dt></dt>
-<dd class="notedate">Posted on August 8, 2016 - 22:38 (UTC)</dd>
-<dt class="note">[[User:BaerMitUmlaut|BaerMitUmlaut]]</dt>
-<dd class="note">
-Particles that have blockAIVisibility set to 1 will influence the result, but will not make checkVisibility return 0. Instead an extremly small number will be returned.<br>
-Distance, fog, overcast, rain and nighttime have no effect on the result.
-</dd>
-</dl>