LukeParke/unicorn-utterances
1
0
Fork 0
mirror of https://github.com/LukeHagar/unicorn-utterances.git synced 2025-12-09 12:57:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

add coordinate grid alignment section

Browse Source
This commit is contained in:
James Fenn
2022-06-15 21:18:59 -04:00
parent fd65a8f49b
commit 47dfae789c
2 changed files with 196 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

173
content/blog/minecraft-data-packs-cmd-syntax/coordinate-grid-0-5.svg Normal file
View File

@@ -0,0 +1,173 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
width="150mm"
height="150mm"
viewBox="0 0 150 150"
version="1.1"
id="svg5"
inkscape:version="1.1.2 (0a00cf5339, 2022-02-04, custom)"
sodipodi:docname="coordinate-grid-0-5.svg"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns="http://www.w3.org/2000/svg"
xmlns:svg="http://www.w3.org/2000/svg">
<sodipodi:namedview
id="namedview7"
pagecolor="#ffffff"
bordercolor="#666666"
borderopacity="1.0"
inkscape:pageshadow="2"
inkscape:pageopacity="0.0"
inkscape:pagecheckerboard="0"
inkscape:document-units="mm"
showgrid="true"
width="150mm"
inkscape:snap-page="true"
inkscape:snap-text-baseline="true"
inkscape:snap-center="true"
inkscape:snap-object-midpoints="true"
inkscape:object-paths="true"
inkscape:snap-intersection-paths="true"
inkscape:snap-smooth-nodes="true"
inkscape:snap-midpoints="true"
inkscape:zoom="0.64340429"
inkscape:cx="326.38887"
inkscape:cy="599.93383"
inkscape:window-width="1686"
inkscape:window-height="991"
inkscape:window-x="208"
inkscape:window-y="63"
inkscape:window-maximized="1"
inkscape:current-layer="layer1"
inkscape:snap-nodes="true"
inkscape:snap-others="true" />
<defs
id="defs2" />
<g
inkscape:label="Layer 1"
inkscape:groupmode="layer"
id="layer1">
<rect
style="fill:#ffffff;fill-opacity:1;stroke-width:1.51146;stroke-linejoin:round"
id="rect903-5-0"
width="150"
height="150"
x="-1.4210855e-14"
y="-8.8817842e-15" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903"
width="40"
height="40"
x="0"
y="0" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-7"
width="40"
height="40"
x="40"
y="40" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-2"
width="40"
height="40"
x="80"
y="9.5367432e-07" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-5"
width="40"
height="40"
x="120"
y="40" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-8"
width="40"
height="40"
x="80"
y="80" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-0"
width="40"
height="40"
x="0"
y="80" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-1"
width="40"
height="40"
x="40"
y="120" />
<rect
style="fill:#81a0d3;stroke-width:0.403055;stroke-linejoin:round"
id="rect903-6"
width="40"
height="40"
x="120"
y="120" />
<circle
style="fill:#000000;fill-opacity:1;stroke-width:0.234828;stroke-linejoin:round"
id="path1107-7"
cx="100"
cy="100"
r="2.5" />
<text
xml:space="preserve"
style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;stroke-width:0.264583"
x="57.317791"
y="74.642242"
id="text2294"><tspan
sodipodi:role="line"
id="tspan2292"
style="font-size:8.46667px;stroke-width:0.264583"
x="57.317791"
y="74.642242">(0, 0)</tspan></text>
<text
xml:space="preserve"
style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;stroke-width:0.264583"
x="102.16317"
y="109.8497"
id="text2294-6"><tspan
sodipodi:role="line"
id="tspan2292-0"
style="font-size:8.46667px;stroke-width:0.264583"
x="102.16317"
y="109.8497">(0.5, 0.5)</tspan></text>
<path
style="fill:none;stroke:#d40000;stroke-width:0.870452;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
d="M 79.952675,79.955831 95.345197,95.513216"
id="path971"
sodipodi:nodetypes="cc" />
<path
sodipodi:type="star"
style="fill:#d40000;stroke-width:3.77953;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;fill-opacity:1"
id="path1077"
inkscape:flatsided="false"
sodipodi:sides="3"
sodipodi:cx="335.42999"
sodipodi:cy="381.6991"
sodipodi:r1="10.342978"
sodipodi:r2="5.1714888"
sodipodi:arg1="0.75390844"
sodipodi:arg2="1.801106"
inkscape:rounded="0"
inkscape:randomized="0"
d="m 342.97022,388.7788 -8.72077,-2.04476 -8.72077,-2.04476 6.1312,-6.53003 6.1312,-6.53003 2.58957,8.57479 z"
transform="matrix(0.26440251,0.0097802,-0.0097802,0.26440251,10.389761,-8.6895582)"
inkscape:transform-center-x="0.36137896"
inkscape:transform-center-y="-0.34688974" />
<circle
style="fill:#000000;fill-opacity:1;stroke-width:0.234828;stroke-linejoin:round"
id="path1107"
cx="80"
cy="80"
r="2.5" />
</g>
</svg>
Side by Side

After

Width:  |  Height:  |  Size: 5.3 KiB

24
content/blog/minecraft-data-packs-cmd-syntax/index.md
View File

@@ -65,6 +65,28 @@ To experiment with the position syntax and see where certain positions end up in
An important note when using these positions: for players (and most other entities), any positions will actually start *at the player's feet.* If we want to start at the player's head, we can use the `anchored eyes` subcommand to correct this &mdash; using directional coordinates, `/execute anchored eyes run summon pig ^ ^ ^4` should summon a pig 4 blocks forward in the exact center of wherever player is looking.
## Coordinate grid alignment
In order to align a position with the edge of a block, we can use another subcommand: `/execute align xyz`. This will align the command's position on the X, Y, and Z axes. You can also omit any axes that don't need alignment, so `align x` or `align xz` would also work as expected.
We can use this to ensure that a summoned entity is always spawned in alignment with the block grid, and not partway in-between block coordinates:
```shell
execute align xz run summon pig ~ ~ ~
```
However, an important thing to note about Minecraft's coordinate system is that **whole numbers do not refer to the center of a block.** Instead, they are aligned with the bottom corner in the negative direction of each axis.
This means that, if you summon an entity at `0 ~ 0`, it will actually end up on the corner of the block at (0, 0). To fix this, you'll need to correct for the offset by moving it `0.5` on each axis; i.e. `0.5 ~ 0.5`.
![A block grid showing the coordinate at 0,0 and the coordinate at 0.5,0.5](./coordinate-grid-0-5.svg)
Thus, to summon an entity in the center of a block, we can use this command:
```shell
execute align xz run summon pig ~0.5 ~ ~0.5
```
## Positions in an "/execute" subcommand
The `/execute` command also has a subcommand that can set the position of the command it runs: `positioned ~ ~ ~`. Using this, we can rewrite our previous command:
@@ -84,7 +106,7 @@ Since our `spawn` function summons all of the animals at its position of executi
# Entity selectors
So we've figured out how to use positions for the player, but how can we refer to other entities in the world? If you've paid attention to the `/kill @e[type=pig]` command from earlier, this is actually using an *entity selector* to reference all of the pigs in the world. We're using the `@e` variable (all entities in the world), and filtering it by `type=pig` to only select the entities that are pigs.
So we've figured out how to use the position of the player, but how can we refer to other entities in the world? If you've paid attention to the `/kill @e[type=pig]` command from earlier, this is actually using an *entity selector* to reference all of the pigs in the world. We're using the `@e` variable (all entities in the world), and filtering it by `type=pig` to only select the entities that are pigs.
Here's a list of some other selector variables we can use:
- `@p` targets only the **nearest player** to the command's execution