IsElementOnScreen: Difference between revisions

Latest revision as of 10:25, 30 January 2022

This function will check if an element is on the screen. Elements behind objects but still in the camera view count as being on screen.

This function is particularly useful for detecting if dynamic objects are in "destroyed" state. Destroyed objects will return false.

Syntax

bool isElementOnScreen ( element theElement )

OOP Syntax Help! I don't understand this!

Method: element:isOnScreen(...)

Variable: .onScreen

Required Arguments

theElement: The element of which you wish to check wether it's being rendered on screen.

Returns

Returns true if element is on screen, false if not.

Issues

Issue ID	Description
#2029	isElementOnScreen doesn't work for markers

Example

This function will check if you can see your killer when you die.

function player_Wasted ( killer, weapon, bodypart )
    -- if there even was a killer and the killer isn't the killed player itself
    if ( killer ) and ( killer ~= source ) then
        -- there was a killer
        if ( isElementOnScreen ( killer ) ) then
            -- the killer was on screen
            outputChatBox ( "You can still see your killer!", 255, 0, 0 )
        else
            -- the killer was not on screen
            outputChatBox ( "You can not see your killer!", 255, 0, 0 )
        end
    end
end
-- call player_Wasted when only the local player dies
addEventHandler ( "onClientPlayerWasted", localPlayer, player_Wasted )

@@ Line 1: / Line 1: @@
 __NOTOC__
 {{Client function}}
+This function will check if an element is on the screen. Elements behind objects but still in the camera view count as being on screen.
+This function is particularly useful for detecting if dynamic objects are in "destroyed" state. Destroyed objects will return false.
 ==Syntax==
 <syntaxhighlight lang="lua">
 bool isElementOnScreen ( element theElement )
 </syntaxhighlight>
+{{New feature/item|3.0141|1.4.0|6987|{{OOP||[[element]]:isOnScreen|onScreen}}}}
 ===Required Arguments===
 *'''theElement:''' The element of which you wish to check wether it's being rendered on screen.
 ===Returns===
 Returns ''true'' if element is on screen, ''false'' if not.
+==Issues==
+{{Issues|
+{{Issue|2029|isElementOnScreen doesn't work for markers}}
+}}
 ==Example==
-This function will check if you can see your kill when you die.
+This function will check if you can see your killer when you die.
 <syntaxhighlight lang="lua">
 function player_Wasted ( killer, weapon, bodypart )
@@ Line 17: / Line 26: @@
          -- there was a killer
          if ( isElementOnScreen ( killer ) ) then
-             -- the player who was killed can see his killer
+             -- the killer was on screen
-             outputChatBox ( "You can still see your killer!", source, 255, 0, 0 )
+             outputChatBox ( "You can still see your killer!", 255, 0, 0 )
          else
-             -- the player who was killed can not see his killer
+             -- the killer was not on screen
-             outputChatBox ( "You can not see your killer!", source, 255, 0, 0 )
+             outputChatBox ( "You can not see your killer!", 255, 0, 0 )
          end
      end
 end
-addEventHandler ( "onClientPlayerWasted", getRootElement(), player_Wasted )
+-- call player_Wasted when only the local player dies
+addEventHandler ( "onClientPlayerWasted", localPlayer, player_Wasted )
 </syntaxhighlight>
 ==See Also==
 {{Client element functions}}