#@gui _<b>Degradations</b>

#@gui Cascading Self Glitching : fx_self_glitching_cascade, fx_self_glitching_cascade_preview(1)
#@gui : Iterations = int(3,1,10)
#@gui : Multiplier = float(0,-5,5)
#@gui : Bias = float(0,-255,255)
#@gui : Negate = bool(0)
#@gui : Operator = choice("Add","Mul","And","Or","Xor","Pow","Reverse pow","Mod","Reverse mod")
#@gui : First shift target = point(50,50)
#@gui : Cascade centre point = point(50,50)
#@gui : Shift randomness = float(0.25,0,10)
#@gui : Boundary = choice(3,"Zero","Nearest","Periodic","Mirror")
#@gui : sep = separator(), Preview type = choice("Full","Forward horizontal","Forward vertical","Backward horizontal","Backward vertical","Duplicate top","Duplicate left","Duplicate bottom","Duplicate right","Duplicate horizontal","Duplicate vertical","Checkered","Checkered inverse"), Preview split = point(50,50,0,0,200,200,200,0,10,0)
#@gui : sep = separator(), note = note("<small>Author: <i><a href="https://goo.gl/Ryf7Cv">David Tschumperl&#233;</a></i>.      Latest update: <i>2018/08/19</i>.</small>")
fx_self_glitching_cascade :
repeat $1
repeat $! l[$>] split_opacity l[0]
f "init(
shift = ([w,h]-1)*([$8,$9]-[$6,$7]+(2*(u-0.5)*sqrt((($8-$6)^2)+(($9-$7)^2))*$10))%;
const sign = $4?-1:1;
const boundary = $11;
);
val = sign*((2^$2)*j(shift) + $3);
($5==0?(val + i):
$5==1?(val * i):
$5==2?(val & i):
$5==3?(val | i):
$5==4?xor(val,i):
$5==5?(val^i):
$5==6?(i^val):
$5==7?(val%i):
(i%val)
)%256;
"
endl a c endl done done
fx_self_glitching_cascade_preview :
gui_split_preview "fx_self_glitching_cascade $*",${-3--1}