Snippet StringGradient

quraji

zap
Reaction score
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After no interest was shown in my submission of other string functions (as I expected :p), I've decided to post this one separately instead of adding it to my previous post (I think people will actually find this one neat).

What is it?
It's a function that will transform and normal, boring string into a beautiful gradient string. The other functions are just utility functions for the main one, but feel free to use them too.

How do I use it?
Just use:
JASS:
call StringGradient(s, r1, g1, b1, r2, g2, b2)

Where s is the string; (r1,g1,b1) are the RGB values of the first color (from 0-255); and (r2,g2,b2) are the RGB values of the second color.

Picture?
Here:
kvw9e.jpg


Code?
JASS:

library StringGradient initializer hexinit

globals
   private string array Hex_Values [16]
endglobals

    // changes an RGB int to a hex color code 
function Int2ColorCode takes integer i returns string
    local string hex = ""
    local integer r = 0
    local boolean returnearly = false
    
    if (i<=0) then
        set hex = "00"
        set returnearly = true
    elseif (i<=15) then
        set hex = &quot;0&quot;+Hex_Values<i>
        set returnearly = true
    elseif (i&gt;=255) then
        set hex = &quot;FF&quot;
        set returnearly = true
    endif
    
    if (returnearly==true) then
        return hex
    endif
    
    loop
        set r = ModuloInteger(i,16)
        set i = i/16
        set hex = Hex_Values[r] + hex
        exitwhen (i==0)
    endloop
    
    return hex
endfunction
    
    // returns a full color code from RGB values (not including the tags or alpha)
function RGB2ColorCode takes integer red, integer green, integer blue returns string
    return Int2ColorCode(red)+Int2ColorCode(green)+Int2ColorCode(blue)
endfunction

    // returns the color code of the color percent of the way from RGB1 to RGB2
function GetGradientColor takes integer red1, integer green1, integer blue1, integer red2, integer green2, integer blue2, real percent returns string
    return RGB2ColorCode(red1 + R2I(percent*(red2-red1)),green1 + R2I(percent*(green2-green1)),blue1 + R2I(percent*(blue2-blue1)))
endfunction

    // returns the string with a color gradient
function StringGradient takes string s, integer red1, integer green1, integer blue1, integer red2, integer green2, integer blue2 returns string
    local integer len = StringLength(s)
    local real increment = 1./len
    local real percent = 0.
    local string grad = &quot;&quot;
    local string s2 = &quot;&quot;
    local integer i = 0
    
    loop
        set grad = GetGradientColor(red1, green1, blue1, red2, green2, blue2, percent)
        set s2 = s2+&quot;|cff&quot;+grad+SubString(s, i, i+1)+&quot;|r&quot;
        set percent = percent+increment
        set i = i+1
        exitwhen (i==len)
    endloop
    return s2
endfunction

private function hexinit takes nothing returns nothing
    set Hex_Values[0] = &quot;0&quot;
    set Hex_Values[1] = &quot;1&quot;
    set Hex_Values[2] = &quot;2&quot;
    set Hex_Values[3] = &quot;3&quot;
    set Hex_Values[4] = &quot;4&quot;
    set Hex_Values[5] = &quot;5&quot;
    set Hex_Values[6] = &quot;6&quot;
    set Hex_Values[7] = &quot;7&quot;
    set Hex_Values[8] = &quot;8&quot;
    set Hex_Values[9] = &quot;9&quot;
    set Hex_Values[10] = &quot;A&quot;
    set Hex_Values[11] = &quot;B&quot;
    set Hex_Values[12] = &quot;C&quot;
    set Hex_Values[13] = &quot;D&quot;
    set Hex_Values[14] = &quot;E&quot;
    set Hex_Values[15] = &quot;F&quot;
endfunction

endlibrary
</i>


Note:
When displaying gradient strings (like with BJDebugMsg or others), remember that the color code counts towards the limit of characters to be shown. So if your string is cut short or has a visible color code at the end, you need to shorten it. I was too lazy to add any safety for this :p
 

Renendaru

(Evol)ution is nothing without love.
Reaction score
309
You sure love strings, don't you.
 
Reaction score
341
Pretty cool but I don't really think it's useful. People usually just use a program for these sort of things.

And not to mention direct string usage is faster than this function. Cool though.
 

quraji

zap
Reaction score
144
Pretty cool but I don't really think it's useful. People usually just use a program for these sort of things.

And not to mention direct string usage is faster than this function. Cool though.

What if the colors were based on something dynamic, like unit life...or something like that? :thup:

Thanks for the comments.
 

Jesus4Lyf

Good Idea™
Reaction score
397
JASS:
function Int2ColorCode takes integer i returns string
    local string hex = &quot;&quot;
    local integer r = 0
    local boolean returnearly = false
    
    if (i&lt;=0) then
        set hex = &quot;00&quot;
        set returnearly = true
    elseif (i&lt;=15) then
        set hex = &quot;0&quot;+Hex_Values<i>
        set returnearly = true
    elseif (i&gt;=255) then
        set hex = &quot;FF&quot;
        set returnearly = true
    endif
    
    if (returnearly==true) then
        return hex
    endif
    
    loop
        set r = ModuloInteger(i,16)
        set i = i/16
        set hex = Hex_Values[r] + hex
        exitwhen (i==0)
    endloop
    
    return hex
endfunction</i>

I'm sure with some initialisation work, this can be:
JASS:
function Int2ColorCode takes integer i returns string
    if i&lt;=0 then
        return &quot;00&quot;
    endif
    if i&gt;=255 then
        return &quot;FF&quot;
    endif
    return Hex_Values<i>
endfunction</i>

:)
 
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