GetColorFromString: Difference between revisions

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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.


{{New feature|3|DP3|From DP3, this will be supported client-side as well as server-side. Lowercase strings will also be accepted}}
{{New feature|3|1.0|From 1.0, this will be supported client-side as well as server-side. Lowercase strings will also be accepted}}


==Syntax==  
==Syntax==  

Revision as of 01:09, 25 November 2008

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.

From 1.0, this will be supported client-side as well as server-side. Lowercase strings will also be accepted

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

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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