

# Dice Witch
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Dice Witch is a highly advanced bot that rolls TRPG dice on Discord. It displays the dice visually, and aims to simulate the experience of rolling real dice.


# Install

You can install Dice Witch on your Discord server by clicking [here](https://discord.com/api/oauth2/authorize?client_id=808161585876697108&permissions=0&scope=bot%20applications.commands).

# Usage


## Basic rolls
Dice Witch can roll dice with any number of sides, but will only display images of four, six, eight, ten, twelve, or twenty-sided dice. The recommended way to interact with Dice Witch is to use Discord's new [slash commands](https://blog.discord.com/slash-commands-are-here-8db0a385d9e6). To get started, just start typing `/roll`. 

If you want to keep using non-slash commands, you can also use the legacy command `!roll`. 

  - `/roll notation:1d4 3d6 1d20`: Roll one four-sided die, three six-sided dice, and one twenty-sided die.
  - `/roll notation:1d12+3 5d4`: Roll one twelve-sided die, adding three to the total, and five four sided dice. 
  - `/roll notation:3d6+3d6`: Roll two sets of three six-sided dice and add the total. 


## Advanced rolls
You can use (almost) any of these modifiers in conjunction with any other modifiers. 

### Min/Max
Cause any rolls above/below the value to be treated as equal to the minimum/maximum value.
  - `/roll notation:4d6min3`: Roll four d6 where values less than three are treated as equal to three.
  - `/roll notation:4d10max5`: Roll four d10 where values greater than five are treated as equal to five.
  - `/roll notation:10d20max15min5`: Roll ten d20 where values greater than fifteen are treated as equal to fifteen, and values less than five are treated as equal to five.


### Exploding
Allows one or more dice to be re-rolled (Usually when it rolls the highest possible number on the die), with each successive roll being added to the total.
  - `/roll notation:2d6!=5`: Roll two d6 and explode on any roll equal to five.
  - `/roll notation:roll 2d!>4`: Roll two d6 and explode on any roll greater than four. 
  - `/roll notation:4d10!<=3`: Roll four d10 and explode on any roll less than or equal to three. 

#### Compounding
Just like exploding, but exploded dice will be combined together in a single roll instead of being re-rolled. You can mark exploding dice to compound by using  `!!` instead of `!`
  - `/roll notation:2d6!!=5`: Roll two d6 and explode and compound on any roll equal to five.

#### Penetrating
A type of exploding dice most commonly used in the Hackmaster system. 
>Should you roll the maximum value on this particular die, you may re-roll and add the result of the extra die, less one point, to the total (penetration can actually result in simply the maximum die value if a 1 is subsequently rolled, since any fool knows that 1-1=0). This process continues indefinitely as long as the die in question continues to come up maximum (but there’s always only a –1 subtracted from the extra die, even if it’s, say, the third die of penetration)

You can mark exploding dice to penetrate by using `!p` instead of `!`. 
- `/roll notation:2d6!p=5`: Roll two d6 and explode and penetrate on any roll equal to five.


### Re-roll
Rerolls a die that rolls the lowest possible number on that die, until a number greater than the minimum is rolled. 

- `/roll notation:1d10r`: Roll 1d10 and reroll on one. 
- `/roll notation:4d10r<=3`: Roll 4d10 and reroll on any result less than or equal to three. 

### Keep/Drop AKA Advantage
Disregard or keep all dice above or below a certain threshold. 
- `/roll notation:4d10k2`: Roll 4d10 and keep the highest two rolls
- `/roll notation:4d10kl2`: Roll 4d10 and keep the lowest two rolls.  

- `/roll notation:4d10d1`: Roll 4d10 and disregard the lowest roll.
- `/roll notation:4d10dh1`: Roll 4d10 and disregard the highest roll.

### Target success/failure AKA Dice pool
Counts the number of dice that meet a criterion.
- `/roll notation:2d6=6`: Roll 2d6 and count the number of dice that equal six
- `/roll notation:6d10<=4`: Roll 6d10 and count the number of dice that are less than or equal to four

### Critical success/failure 
This is an aesthetic feature that makes it super clear when a die has rolled the highest or lowest possible value. It makes no difference to the roll or its value.

- `/roll notation:1d20cs=20`: Roll 1d20 and highlight if result is 20.
- `/roll notation:5d20cs>=16`: Roll 5d20 and highlight if result is greater than 16.
- `/roll notation: 1d20cf=1`: Roll 1d20 and highlight result is 1.

### Sorting

Sorts the results of any of your rolls in ascending or descending numerical order. 

- `/roll notation:4d6`: Roll 4d6 and do not sort.
- `/roll notation:4d6s`: Roll 4d6 and sort results in ascending order.
- `/roll notation:4d6sa`: Same as above.
- `/roll notation:4d6sd`: Roll 4d6 and sort results in descending order.

## Math 

You can use add, subtract, multiply, divide, reduce, and use parentheses as you please. You can also use the following JS math functions: `abs, ceil, cos, exp, floor, log, max, min, pow, round, sign, sin, sqrt, tan`

- `/roll notation:1d6*5`: Roll a d6 and multiply the result by 5 
- `/roll notation:2d10/d20`: Roll 2d20 and add the result together, then roll a d20 and divide the two totals.
- `/roll notation:3d20^4`: Roll 3d20 and raise the result to the power of 4.
- `/roll notation:(4-2)d10`: Subtract 2 from 4 and then roll a d10 that many times .
- `/roll notation:sqrt(4d10/3)`: Roll 4d10, divide by three and calculate the square root.

## Extras 

### Titled rolls

You can title a roll using the 2nd paramater of `/roll`, `title`. 

  - `/roll notation:1d20: title:to flirt with the bartender`: Roll 1d20 with the title "to flirt with the bartender" 

If you're still using non-slash commands, you can use the `!titledroll` command. 

  - `!titledroll 1d20`: Roll 1d20 with a title. You'll be prompted for the title after typing the command, and the roll will only be performed once you've given it. Any `!roll` can also be a `!titledroll`. You have 30 seconds to answer the prompt.

### Repeating rolls

You can repeat any roll by using the `timestorepeat`, the 3rd parameter of `/roll`.

  - `/roll notation:1d20+5 timestorepeat:6`: Roll 1d20+5 six times.
  - `/roll notation:3d20+3d6 timestorepeat:10`: Roll 3d20 and 3d6 and add the results. Repeat ten times.
  - 
If you're using !roll, you can repeat by inserting a `<times to repeat>` string anywhere in your notation.
  - `!roll <6> 1d20+5`: Roll 1d20+5 six times.
  - `!roll 3d20+3d6 <10>`: Roll 3d20 and 3d6 and add the results. Repeat ten times.,

# Support

You can also join the support Discord [here](https://discord.gg/BdyQG7hZZn).

# Credits 
Dice Witch uses the superb [RPG Dice Roller](https://github.com/GreenImp/rpg-dice-roller) library by Lee Langley AKA GreenImp. 


# Roadmap
- [x] ~~Slash commands and buttons support~~
- [ ] User and guild registration
  - [ ] Per user and per guild settings
- [ ] True random numbers based on stochastic atmospheric data
- [ ] A variety of different sets of illustrated and photographed dice


Dice Witch

TRPG dice roller that displays the dice visually, and aims to simulate the experience of rolling real dice.

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