# Script dump

This page is a place to put scripts or links to scripts that may be useful or good examples when you don't want to bother creating a dedicated wiki article. It would be nice to clean some of these up a bit and convert them into wiki pages (see Category:Example Scripts).

# Scripts elsewhere

Unsorted collections of scripts

• The 3rd Party HSI, on this wiki
• Scripts hosted at The Moglery. This is an ancient site, and many of the scripts are obsolete or can now be written in a simpler way, but there are still lots of useful examples.
• Some Useful Functions on SlimeSald

Some of the following scripts might be quite specific to a certain game, but might still be educational or a good starting point.

Textboxes:

Hero/NPC/object graphics/animations:

Sound effects:

Party manipulation:

NPC triggers:

Puzzles:

Map effects:

Doors:

Collision detection:

Line of sight:

# Utility scripts

## Maths

```# Cap n within the range min to max
script, bound, n, min, max, begin
if (n < min) then (exit returning (min))
if (n > max) then (exit returning (max))
return (n)
end

script, min, n1, n2, begin
if (n1 < n2) then (return (n1)) else (return (n2))
end

script, max, n1, n2, begin
if (n1 > n2) then (return (n1)) else (return (n2))
end

# Reduce a number towards zero. For example, reduce(10,2)==8, return(-10,2)==-8
script, reduce, n, amount, begin
if (n < 0) then (
n += amount
if (n > 0) then (n := 0)
) else (
n -= amount
if (n < 0) then (n := 0)
)
return (n)
)

global variable(16300, last diverse random offset)  # Used by diverse random function

# Like random, but when called with the same range multiple times in a row,
# avoids returning a value close to the last one (within 1/5 of the range).
script, diverse random, low, high, begin
variable (ret, offset, range)
range := high -- low + 1
offset := last diverse random offset + range/5 + random(0, range * 3 / 5)
ret := low + (offset, mod, range)
last diverse random offset := offset
return (ret)
end

# Approximation of a normally distributed variable
script, normal var, mu, sigma, begin
variable (i, sum)
for (i, 0, 5) do (sum += random(0, sigma))
return (mu + sum -- 3 * sigma)
end

# 'percent' change of returning true, otherwise returns false
script, d100, percent, begin
return (random(1, 100) <= percent)
end
```
```# Return the distance of a point in the specified direction from the origin
script, directional distance, x, y, dir, begin
switch (dir) do (
case (up)    return (0 -- y)
case (right) return (x)
case (down)  return (y)
case (left)  return (0 -- x)
)
end

script, dir X, dir, begin
switch (dir) do (
case (up, down) return (0)
case (right) return (1)
case (left)  return (-1)
)
end

script, dir Y, dir, begin
switch (dir) do (
case (left, right) return (0)
case (down) return (-1)
case (up)   return (1)
)
end
```

### Sorting

The following script shows how you can sort a list of numbers by using slices and the sort children command.

```plotscript, number sorter, begin
variable (parent)

# Add a `number` to the list of numbers to be sorted.
# `id` can be anything you want sorted, for example it could be an NPC reference or item ID.
subscript, add number, number, id = 0, begin
variable (sl)
sl := create container
set parent (sl, parent)
set sort order (sl, number)
set slice extra (sl, 0, id)
end

# getid(0) returns the id of the smallest number, getid(1) is 2nd smallest, etc
subscript, get id, index, begin
return (get slice extra (slice child (parent, index)))
end

# getnumber(0) returns the smallest number, getnumber(1) is the 2nd smallest, etc
subscript, get number, index, begin
return (get sort order (slice child (parent, index)))
end

parent := create container
# You can rearrange these "add number" lines and it makes no difference
sort children (parent, false)
trace value (get id(0), get id(1), get id(2), get id(3))   # prints 3 2 0 1 to g_debug.txt
trace value (get number(0), get number(1), get number(2), get number(3))   # prints -2 0 42 100 to g_debug.txt
free slice (parent)
end
```

## Randomness

```# Returns true percent % of the time
script, d100, percent, begin
return (random(0, 99) < percent)
end
```
```script, random choice, n1=-1, n2=-1, n3=-1, n4=-1, n5=-1, n6=-1, n7=-1, n8=-1, n9=-1, begin
variable(last)
if(n1 > -1) then(last:=1)
if(n2 > -1) then(last:=2)
if(n3 > -1) then(last:=3)
if(n4 > -1) then(last:=4)
if(n5 > -1) then(last:=5)
if(n6 > -1) then(last:=6)
if(n7 > -1) then(last:=7)
if(n8 > -1) then(last:=8)
if(n9 > -1) then(last:=9)
if(n10 > -1) then(last:=10)
variable(r)
r := random(1, last)
switch(r) do(
case(1) do(exit returning(n1))
case(2) do(exit returning(n2))
case(3) do(exit returning(n3))
case(4) do(exit returning(n4))
case(5) do(exit returning(n5))
case(6) do(exit returning(n6))
case(7) do(exit returning(n7))
case(8) do(exit returning(n8))
case(9) do(exit returning(n9))
case(10) do(exit returning(n10))
)
end

plotscript, example, begin
show text box(random choice(15, 27, 4, 250, 252))
wait for text box
end
```

## Slices

```script, count slices, start slice, begin
variable(count)
# First count self
count += 1
# Then recursively count children
variable(child)
child := first child(start slice)
while(child) do(
count += count slices(child)
child := next sibling(child)
)
exit returning(count)
end
```

### set parent keep pos

Using setparent does not behave the same as setting a slice's parent in the slice editor (with the shift key). A slice's x/y position is relative to (some edge or corner of) its parent. When you setparent usually it will also move on the screen because the thing its position is relative to changes. On the other hand in the slice editor when you reparent the offset is recalculated to keep the slice in the same position relative to the screen.

Here is a handy little helper script if you want to reparent a slice without changing its current position.

```script, set parent keep pos, sl, new parent, begin
variable(oldx, oldy)
oldx := slice screen x(sl)
oldy := slice screen y(sl)
set parent(sl, new parent)
set slice screen x(sl, oldx)
set slice screen y(sl, oldy)
end
```

## Strings

Copies from one string to another, while removing characters that are icons in the font (adjust for the range of icons you have in your font).

```script, remove icons from string, in str, out str, begin
variable(i, ascii)
clear string(out str)
for (i, 1, string length(in str)) do (
ascii := ascii from string(in str, i)
#if (ascii < 127) then (   # ASCII font
if (ascii < 127 || ascii > 160) then (  # Latin-1 font
append ascii(out str, ascii)
)
)
end
```

# Examples

```# Attach this script to an NPC, and set the 'Script Argument'
# to a formation number to trigger.
# The NPC will be deleted after the battle.
# The NPC can optionally show a textbox as well as triggering
# this script.
# Note: the NPC reappears if you load a saved game, or
# leave the map and don't have
# "NPC Data: Remember state when leaving" turned on.
plotscript, npc battle, formation, npcref, begin
# Prevent the NPC from immediately re-triggering and showing another textbox
set npc usable(npcref, false)
wait for textbox
fightformation(formation)
destroy npc(npcref)
end
```
```# Attach this script to an NPC, and set the 'Script Argument'
# to a formation number to trigger.
# The NPC will be deleted after the battle if you won, and
# is made un-activatable for 1 second if you run.
# The NPC can optionally show a textbox as well as triggering
# this script.
# Note: the NPC reappears if you load a saved game, or
# leave the map and don't have
# "NPC Data: Remember state when leaving" turned on.
plotscript, npc battle, formation, npcref, begin
# Prevent the NPC from immediately re-triggering
set npc usable(npcref, false)
wait for textbox
if (fightformation(formation)) then (
# Won the battle
destroy npc(npcref)
) else (
# Wait one second, then make the NPC deadly again
wait(18)
setnpcusable(npcref, true)
)
end
```
```plotscript, fun with tile changing, begin
if(keyval(key:comma) > 1) then(decrement current tile)
if(keyval(key:period) > 1) then(increment current tile)
if(keyval(key:O) > 1) then(change tileset(layer tileset(0) -- 1, 0))
if(keyval(key:P) > 1) then(change tileset(layer tileset(0) + 1, 0))
if(keyval(key:backspace) > 1) then(reset map state)
if(keyval(key:S) > 1) then(save map state)
if(keyval(key:L) > 1) then(load map state)
end

script, increment current tile, begin
change current tile by(1)
end

script, decrement current tile, begin
change current tile by(-1)
end

script, change current tile by, amount, begin
variable(tile, x, y)
x := hero x(me)
y := hero y(me)
tile := read map block(x, y, 0)
tile := tile + amount, mod, 256
write map block(x, y, tile, 0)
end
```
```plotscript, each step example, x, y, begin
variable(pass)
pass := read pass block(x, y)
if(pass ,and, harm tile) then(
play sound(5, false, true)
)
end
```
```plotscript, on keypress handler, begin
if(hero is walking(me) == false) then(
set hero speed(me, 4)
if(key is pressed(key:Z)) then(
set hero speed(me, 10)
)
)
end
```
```global variable(1, space being held)

plotscript, on key example, begin
if(key is pressed(key:space)) then(
if(not(space being held)) then(
space being held := true
space key down
)
)else(
space being held := false
)
end

script, space key down, begin
# This stuff only happens when you press spacebar
# and will not repeat if you hold it down
end
```

## Examples involving animations or visualisations

```global variable(1, face)

plotscript, new game, begin
init face
end

init face
end

script, init face, begin
face := load medium enemy sprite(5)
realign slice (face, edge:center, edge:bottom, edge:center, edge:bottom)
normal face expression
end

script, normal face expression, begin
replace medium enemy sprite(face, 5)
set timer(1, 0, 20, @blink eyes)
end

replace medium enemy sprite(face, 6)
set timer(1, 0, 1, @normal face expression)
end
```
```plotscript, somebody talking, begin
show text box(5)
wait for text box while animating(14, 15)
end

script, wait for text box while animating, backdrop 1, backdrop2, begin
while(true) do(
show backdrop(backdrop 1)
wait(1)
if(current text box == -1) then(exit script)
show backdrop(backdrop 2)
wait(1)
if(current text box == -1) then(exit script)
)
end
```
```script, pokemon evolve example, begin
large pokemon evolve(5, 6)
end

script, large pokemon evolve, sprite 1, sprite 2, begin
# This script assumes that palette 0 is all black
variable(sl)
sl := load large enemy sprite(sprite 1)
center slice(sl)
wait(20)
set sprite palette(sl, 0)
wait(6)
variable(i)
for(i, 0, 10) do(
replace large enemy sprite(sl, sprite 1, 0)
wait(2)
replace large enemy sprite(sl, sprite 2, 0)
wait(2)
)
wait(6)
set sprite palette(sprite 2)
wait(20)
free slice(sl)
end
```
```plotscript, single cloud example, begin
variable(sl)
sl := load large enemy sprite(10)
# Attach the slice to the topmost map layer
set parent(sl, lookup slice(sl:map layer7))
# center the slice on tile x=125 y=47
set slice x(125 * 20)
set slice y(47 * 20)
set horiz anchor(sl, edge:center)
set vert anchor(sl, edge:middle)
end
```

The following script can be attached to an NPC (either onetime-use or normal) to make it melt and disappear (instead of disappearing instantly). Note: unfortunately the NPC will disappear for one tick and then reappear when it's used, before melting, unless you also attach a textbox to the NPC, which prevents the NPC from immediately disappearing.

```plotscript, melt away npc, unused arg, npcref, begin
# First, turn the NPC's onetime tag back on to make it reappear
variable (onetime)