Hellow, I have a string and I want to make case depending on it's first 
character, like :

   #switch (substr(myString,1,1)) str
     #case ("s","S") #local ret=vStart; #break
     #case ("e","E") #local ret=vEnd; #break
     #case ("c","C") #local ret=vEnd; #break
     #else #error "[!] Unknown logo fade type\n\n"
   #end

how can I do this ?

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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