GetScreenFromWorldPosition: Difference between revisions

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__NOTOC__
__NOTOC__
{{Client function}}
{{Client function}}
{{Needs_Example}}
This function gets the screen position of a point in the world. This is useful for attaching 2D gui elements to parts of the world (e.g. players) or detecting if a point is on the screen (though it does not check if it is actually visible, you should use [[processLineOfSight]] for that).
This function gets the screen position of a point in the world. This is useful for attaching 2D gui elements to parts of the world (e.g. players) or detecting if a point is on the screen (though it does not check if it is actually visible, you should use [[processLineOfSight]] for that).


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===Returns===
===Returns===
Returns two ''x'', ''y'' [[float]]s indicating the screen position and [[float]] distance between screen and given position if successful, ''false'' otherwise.
Returns two ''x'', ''y'' [[float]]s indicating the screen position and [[float]] distance between screen and given position if successful, ''false'' otherwise.
===Example===
<section class="client" name="Client-side Script" show="true">
This example add a '3d' text at coordinates 0, 0, 0 (center of map).
<syntaxhighlight lang="lua">
addEventHandler ( "onClientRender", root,
function ( )
if ( getDistanceBetweenPoints3D ( 0, 0, 3, getElementPosition ( localPlayer ) ) ) < 50 then
local coords = { getScreenFromWorldPosition ( 0, 0, 3 ) }
if coords[1] and coords[2] then
dxDrawText ( "Hello !", coords[1], coords[2], coords[1], coords[2], tocolor(255,255,255), 1, "default-bold" )
end
end
end )
</syntaxhighlight>
</section>


==See Also==
==See Also==
{{Client_world_functions}}
{{Client_world_functions}}

Revision as of 22:28, 13 February 2015

This function gets the screen position of a point in the world. This is useful for attaching 2D gui elements to parts of the world (e.g. players) or detecting if a point is on the screen (though it does not check if it is actually visible, you should use processLineOfSight for that).

Syntax

float float getScreenFromWorldPosition ( float x, float y, float z, [ float edgeTolerance=0, bool relative=true ] )

Required Arguments

  • x: A float value indicating the x position in the world.
  • y: A float value indicating the y position in the world.
  • z: A float value indicating the z position in the world.

Optional Arguments

NOTE: When using optional arguments, you might need to supply all arguments before the one you wish to use. For more information on optional arguments, see optional arguments.

  • edgeTolerance: A float value indicating the distance the position can be off screen before the function returns false.
  • relative: A boolean value that indicates if edgeTolerance is in pixels [false], or relative to the screen size [true].

Returns

Returns two x, y floats indicating the screen position and float distance between screen and given position if successful, false otherwise.

Example

Click to collapse [-]
Client-side Script

This example add a '3d' text at coordinates 0, 0, 0 (center of map). 

addEventHandler ( "onClientRender", root,
function ( )
	if ( getDistanceBetweenPoints3D ( 0, 0, 3, getElementPosition ( localPlayer ) ) ) < 50 then
		local coords = { getScreenFromWorldPosition ( 0, 0, 3 ) }
		if coords[1] and coords[2] then
			dxDrawText ( "Hello !", coords[1], coords[2], coords[1], coords[2], tocolor(255,255,255), 1, "default-bold" )
		end
	end
end )

See Also



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