; Contains code to mimic the "coloring functions" built in to Fractint:
; fmod, bof60, bof61, tdis, zmag 

fmod (INNER) {
init:
	float small_mag = -1.0
loop:
	float zmag = |z|
	if ( zmag < @closeprox) 
		small_mag = zmag
	endif
final: 
	if small_mag < 0.0
		#solid = true
	else
		#index = small_mag/@closeprox
	endif
default:
float param closeprox
	default = 0.01
endparam
}

bof60 {
init:
	float mag_of_closest_point = 1e100
loop:
	float zmag = |z|
	if zmag < mag_of_closest_point
		mag_of_closest_point = zmag
	endif
final:
	#index = sqrt(mag_of_closest_point) * 75.0/256.0
}

bof61 {
init:
	int current_index = -1 ; -1 to match Fractint's notion of iter count
	int index_of_closest_point = -1
	float mag_of_closest_point = 1e100
loop:
	current_index = current_index + 1
	float zmag = |z|
	if zmag < mag_of_closest_point
		index_of_closest_point = current_index
		mag_of_closest_point = zmag
	endif
final:
	#index = index_of_closest_point /256.0
}

tdis {
init:
	lastz = z
	float dist = 0.0
loop:
	dist = dist + sqrt(|z-lastz|)
	lastz = z
final:
	#index = dist / 256.0
}

zmag {
final:
	#index = (|z| * #numiter/2.0 + 1)/256.0
}