bash text manipulation

[highneko]

Check out this neat script I made to create forum text gradients using rgb values! This text is going from blue to black. The reason I did this was because I love text manipulation, and to get people interested in bash.

#!/bin/bash
#rgb reminder of order
message='Check out this neat script I made to create forum text gradients using rgb values! This text is going from blue to black. The reason I did was because I love text manipulation, and to get people interested in bash.'
max="255"
length="${#message}"
increment=$((max / length))
r="0"
g="0"
b="255"

for ((i=0;i<${length};i++)); do if grep -q ' '<<<"${message:i:1}"; then printf ' '; else
hex=$(printf "%02x" "$r"; printf "%02x" "$g"; printf "%02x" "$b"); printf "[color=\"#$hex\"]${message:i:1}[/color]"; fi
# r=$((r - increment))
# g=$((g + increment))
b=$((b - increment))
done

I learnt a lot of stuff I didn't know about bash and hex colors. This is almost completely useless. I'm more interested in the script than the results.

[PriceChild]

This is reasonably funky.

[Brunellus]

an excellent script, and well done.

But please God let's not have it used on the forums, otherwise I will have to accelerate development of my Flogging-over-IP protocol.

[23meg]

███████████████████████████

(edit: oops, didn't work)

[Brunellus]

███████████████████████████

(edit: oops, didn't work)

hey, that looks like the start of a Guru Meditation Error.

[23meg]

hey, that looks like the start of a Guru Meditation Error.

Right, just if I could get it to blink.

[Nikron]

I think that using the script to annoy mods is much more useful than actually learning bash! -joking-

Besides I am trying to learn python.

However, I see the coolness that can result for learning bash =P

Now, how to make a rainbow gradient using this script..

[highneko]

0
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0000000000000000000000000000000000000000000000000000000000
0000000000000000000
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Updated v1.00202111

#!/bin/bash
#rgb reminder of order
trap "exit" INT
echo "Enter a message or press ctl+c to exit"
while true; do
read -p "" message
max="255"
length="${#message}"
increment=$((max / length))
r="0"
g="0"
b="120"

for ((i=0;i<${length};i++)); do if grep -q ' '<<<"${message:i:1}"; then printf ' '; else
hex=$(printf "%02x" "$r"; printf "%02x" "$g"; printf "%02x" "$b"); printf "[color=\"#$hex\"]${message:i:1}[/color]"; fi
# r=$((r - increment))
# g=$((g - increment))
b=$((b - increment))
# if [[ "$g" -lt "0" ]]; then g=0; fi
done
echo ''
done

[Nikron]

00
0000
000000
0000000000
0000000000000
0000000000000000
0000000000000000000
0000000000000000000000
0000000000000000000000000
0000000000000000000000000000
000000000000000000000000000000
0000000000000000000000000000000000
0000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000
0000000000000000000
0000000000000000000
0000000000000000000

YourScript v.Nikron*



*No longer accepts lines less than 2 characters. Easy to fix though..

#!/bin/bash
#rgb reminder of order
trap "exit" INT
echo "Enter a message or press ctl+c to exit"
while true; do
read -p "" message
max="255"
truelength="${#message}"
length="${#message} / 2"
increment=$((max / length))
r="0"
g="0"
b="255"

for ((i=0;i<${truelength};i++)); do if grep -q ' '<<<"${message:i:1}"; then printf ' '; else
hex=$(printf "%02x" "$r"; printf "%02x" "$g"; printf "%02x" "$b"); printf "[color=\"#$hex\"]${message:i:1}[/color]";fi
if [ ${b} -gt 0 ]
then
	r=$((r + increment))
	b=$((b - increment))
fi
if [ ${b} -lt 0 ]
then
	b="0"
fi
if [ ${b} = 0 ]
then
	r=$((r - increment))
	g=$((g + increment))
fi
done
echo ''
done

[picpak]

This is quite possibly the most pointless and most coolest script ever.