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case GMU_ANIM_EXPO:
switch(_ease){
case GMU_ANIM_IN:
r=(t==0)?b : c*power(2,10*(t/d-1))+b;  //'?' get an error in GM: S: Unexpected symbol
break;
case GMU_ANIM_OUT:
r=(t==d)?b+c : c * (-power(2,-10*t/d)+1)+b;  //'?' get an error in GM: S: Unexpected symbol
break;
case GMU_ANIM_IN_OUT:
if (t==0){
r=b;
}
   if(t==d){
r=b+c;
}
t/=d/2;
  if (t<1){
r=c/2*power(2,10*(t-1))+b;
}else{
r=c/2*(-power(2,-10*--t)+2)+b;
}
break;
}
break;