Clojure API for Minecraft/Bukkit

(require '[lambdaisland.witchcraft.cursor :as c])

(-> (c/start)
    (c/draw)
    (c/material :red-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :blue-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :green-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :yellow-glazed-terracotta)
    (c/steps 3)
    (c/build)
    )

Logo-like API for drawing blocks by using a walking metaphor.

This is a functional API, movements simply build up a list of block positions,
call [[build!]] at the end to actually make them materialize in the game.

A cursor contains a current location (x/y/z), a
directions (:north, :north-east, :east, etc.), and a current building
material, e.g :lapis-block (see [[lambdaisland.witchcraft/materials]]).

It also contains a drawing flag `:draw?` and a list of blocks `:blocks`. When
drawing is on, then any step will add a block to the list. [[build!]] creates
blocks in the world based on this, and resets the list.

Call [[start]] to get an initial cursor, this will return a cursor that is one
step ahead of the player (so what you draw is in sight), facing away from the
player.

```
(require '[lambdaisland.witchcraft.cursor :as c])

(-> (c/start)
    (c/draw)
    (c/material :red-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :blue-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :green-glazed-terracotta)
    (c/steps 3)
    (c/rotate 2)
    (c/material :yellow-glazed-terracotta)
    (c/steps 3)
    (c/build)
    )
```

A 9 block high chicken shape

A futuristic base consisting of a big torus suspending by three pointy towers.

Event handlers that hook up two buttons to beam the player from one to the
other.

Glowstone specific code, in particular server start/stop logic. Kept separate
to allow using the Witchcraft API in non-Glowstone Bukkit-compatible servers.

Create and handle Glowstone ServerConfig instances

Generally to configure Glowstone you edit YAML files, but that's not very
Clojure-y. This config munging below allows you to define config values as
inline EDN. The values in the config map that you provide to [[data-config]]
or [[server-config]] are keywords derived from the `ServerConfig$Key` enum,
see `(keys config-keys)`

Generate new worlds based on simple xyz->material functions

Quite naive, more a proof of concept.

Adding color and text effects to chat messages and titles via hiccup-like
Markup

Vector/Matrix math

A vector in this context can be anything that
implements [[lambdaisland.witchcraft/with-xyz]]: a Clojure vector (`[x y z]`),
a Clojure map (`{:x .. :y .. :z ..}`), or a Glowstone `Location` or `Vector`.
You get the type back that you put in.

A matrix is a vector of vectors (regular Clojure vectors) and can be
3x3 (linear) or 4x4 (affine/homogenous).

This code is not optimized for speed, it is fine for generating and
manipulating minecraft structures, not for heavy number crunching.

Schedule all nREPL eval operations on the server thread.

This way you don't have to wrap a lot of operations in a [[wc/run-task]].

Utilities for constructing block palettes and working with texture colors.

:aliases {
:cider/nrepl
{:extra-deps
 {nrepl/nrepl                   {:mvn/version "0.8.3"}
  refactor-nrepl/refactor-nrepl {:mvn/version "2.5.1"}
  cider/cider-nrepl             {:mvn/version "0.26.0"}}}

:papermc
{:extra-deps {io.papermc/paper {:local/root "/home/arne/Downloads/paper-1.17.1-157.jar"}}
 :main-opts ["-m" "paper-witch"]}}
}

clj -J-Dcom.mojang.eula.agree=true -J-javaagent:/home/arne/Downloads/paper-1.17.1-157.jar -A:cider/nrepl -M:papermc

Start an embedded Paper server, and paper-specific extensions.

To use this you need to download Paper yourself, and start Clojure/JVM with the right args.

deps.edn:
```
:aliases {
:cider/nrepl
{:extra-deps
 {nrepl/nrepl                   {:mvn/version "0.8.3"}
  refactor-nrepl/refactor-nrepl {:mvn/version "2.5.1"}
  cider/cider-nrepl             {:mvn/version "0.26.0"}}}

:papermc
{:extra-deps {io.papermc/paper {:local/root "/home/arne/Downloads/paper-1.17.1-157.jar"}}
 :main-opts ["-m" "paper-witch"]}}
}
```

Command line:
```
clj -J-Dcom.mojang.eula.agree=true -J-javaagent:/home/arne/Downloads/paper-1.17.1-157.jar -A:cider/nrepl -M:papermc
```