GetColorFromString: Difference between revisions

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__NOTOC__  
{{Server client function}}
__NOTOC__
This function will extract Red, Green, Blue and Alpha values from a hex string you provide it. These strings follow the same format as used in HTML, with addition of the Alpha values.
This function will extract Red, Green, Blue and Alpha values from a hex string you provide it. These strings follow the same format as used in HTML, with addition of the Alpha values.


==Syntax==  
==Syntax==  
<syntaxhighlight lang="lua">int int int int getColorFromString ( string theColor )</syntaxhighlight>  
<syntaxhighlight lang="lua">int, int, int, int getColorFromString ( string theColor )</syntaxhighlight>  


===Required Arguments===  
===Required Arguments===  
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:Valid strings are:
:Valid strings are:
** '''#RRGGBB''': Colors specified, Alpha assumed to be 255.
:* '''#RRGGBB''': Colors specified, Alpha assumed to be 255.
** '''#RRGGBBAA''': All values specified.
:* '''#RRGGBBAA''': All values specified.
** '''#RGB''': Shortened form, will be expanded internally to RRGGBB, as such it provides a smaller number of colors.
:* '''#RGB''': Shortened form, will be expanded internally to RRGGBB, as such it provides a smaller number of colors.
** '''#RGBA''': As above, shortened - each character is duplicated.
:* '''#RGBA''': As above, shortened - each character is duplicated.


:For example:
:For example:
** '''#FF00FF''' is Red: 255, Green: 0, Blue: 255, Alpha: 255
:* '''#FF00FF''' is Red: 255, Green: 0, Blue: 255, Alpha: 255
** '''#F0F''' is Red: 255, Green: 0, Blue: 255, Alpha: 255 (the same as the example above)
:* '''#F0F''' is Red: 255, Green: 0, Blue: 255, Alpha: 255 (the same as the example above)
8* '''#34455699'' is Red: 52, Green: 69, Blue: 86, Alpha: 153
:* '''#34455699''' is Red: 52, Green: 69, Blue: 86, Alpha: 153


All colors used must begin with a # sign.
All colors used must begin with a # sign.
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Returns four integers in RGBA format, with a maximum value of 255 for each.  Each stands for ''red'', ''green'', ''blue'', and ''alpha''.  Alpha decides transparancy where 255 is opaque and 0 is transparent.  ''false'' is returned if the string passed is invalid (for example, is missing the preceeding # sign).
Returns four integers in RGBA format, with a maximum value of 255 for each.  Each stands for ''red'', ''green'', ''blue'', and ''alpha''.  Alpha decides transparancy where 255 is opaque and 0 is transparent.  ''false'' is returned if the string passed is invalid (for example, is missing the preceeding # sign).


==Example==  
==Example==
<section class="server" name="Server" show="true">
This example will set the blip attached to a player to a color they specify by typing ''set_my_color [color]'' in the console.
This example will set the blip attached to a player to a color they specify by typing ''set_my_color [color]'' in the console.
<syntaxhighlight lang="lua">
<syntaxhighlight lang="lua">
addCommandHandler ( "set_my_color", "setPlayerBlipColor" )
function setPlayerBlipColor ( playerSource, commandName, colorString )
function setPlayerBlipColor ( playerSource, commandName, colorString )
     red, green, blue, alpha = getColorFromString ( colorString ) -- convert the color to numbers
     local red, green, blue, alpha = getColorFromString ( colorString ) -- convert the color string to numbers
     playerBlip = getBlipAttachedTo ( playerSource ) -- find the blip attached to the player
     local playerBlip = getBlipAttachedTo ( playerSource )               -- find the blip attached to the player
     if ( playerBlip and red != false ) -- check a blip is attached to the player and that a valid color was specified
     if ( playerBlip and red ) then                                      -- check a blip is attached to the player and that a valid color was specified
         setBlipColor ( playerBlip, red, green, blue, alpha ) -- set the player's blip color
         setBlipColor ( playerBlip, red, green, blue, alpha )           -- set the player's blip color
     end
     end
end
addCommandHandler ( "set_my_color", setPlayerBlipColor )
-- specify the getBlipAttachedTo function
function getBlipAttachedTo( thePlayer )
local blips = getElementsByType( "blip" )
for k, theBlip in ipairs( blips ) do
if getElementAttachedTo( theBlip ) == thePlayer then
return theBlip
end
end
return false
end
end
</syntaxhighlight>
</syntaxhighlight>
</section>


==See Also==
==See Also==
{{Blip_functions}}
{{Utility_functions}}

Latest revision as of 17:43, 25 August 2019

This function will extract Red, Green, Blue and Alpha values from a hex string you provide it. These strings follow the same format as used in HTML, with addition of the Alpha values.

Syntax

int, int, int, int getColorFromString ( string theColor )

Required Arguments

  • theColor: A string containing a valid color code.
Valid strings are:
  • #RRGGBB: Colors specified, Alpha assumed to be 255.
  • #RRGGBBAA: All values specified.
  • #RGB: Shortened form, will be expanded internally to RRGGBB, as such it provides a smaller number of colors.
  • #RGBA: As above, shortened - each character is duplicated.
For example:
  • #FF00FF is Red: 255, Green: 0, Blue: 255, Alpha: 255
  • #F0F is Red: 255, Green: 0, Blue: 255, Alpha: 255 (the same as the example above)
  • #34455699 is Red: 52, Green: 69, Blue: 86, Alpha: 153

All colors used must begin with a # sign.

Returns

Returns four integers in RGBA format, with a maximum value of 255 for each. Each stands for red, green, blue, and alpha. Alpha decides transparancy where 255 is opaque and 0 is transparent. false is returned if the string passed is invalid (for example, is missing the preceeding # sign).

Example

Click to collapse [-]
Server

This example will set the blip attached to a player to a color they specify by typing set_my_color [color] in the console. 

function setPlayerBlipColor ( playerSource, commandName, colorString )
    local red, green, blue, alpha = getColorFromString ( colorString )  -- convert the color string to numbers
    local playerBlip = getBlipAttachedTo ( playerSource )               -- find the blip attached to the player
    if ( playerBlip and red ) then                                      -- check a blip is attached to the player and that a valid color was specified
        setBlipColor ( playerBlip, red, green, blue, alpha )            -- set the player's blip color
    end
end
addCommandHandler ( "set_my_color", setPlayerBlipColor )

-- specify the getBlipAttachedTo function
function getBlipAttachedTo( thePlayer )
	local blips = getElementsByType( "blip" )
	for k, theBlip in ipairs( blips ) do
		if getElementAttachedTo( theBlip ) == thePlayer then
			return theBlip
		end
	end
	return false
end

See Also


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