Add img2brush tool to website

Pending insertion of a link into the reference docs
This commit is contained in:
Starbeamrainbowlabs 2021-12-28 22:13:38 +00:00
parent ef2dbc1806
commit 691b71adfe
Signed by: sbrl
GPG key ID: 1BE5172E637709C2
4 changed files with 159 additions and 1 deletions

View file

@ -75,7 +75,7 @@ async function fetch(url) {
}
module.exports = function(eleventyConfig) {
eleventyConfig.addPassthroughCopy("img2brush/img2brush.js");
eleventyConfig.addAsyncShortcode("fetch", fetch);
// eleventyConfig.addPassthroughCopy("images");

View file

@ -411,3 +411,30 @@ footer {
flex-direction: column;
align-items: center;
}
@keyframes move-diagonal {
from {
background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px;
}
to {
background-position: -52px -52px, -52px -52px, -51px -51px, -51px -51px;
}
}
#dropzone {
border: 0.3em dashed #aaaaaa;
transition: border 0.2s;
justify-content: flex-start;
}
#dropzone.dropzone-active {
border: 0.3em dashed hsl(203, 79%, 55%);
/* Ref https://www.magicpattern.design/tools/css-backgrounds */
background-image: linear-gradient(var(--bg-bright) 2px, transparent 2px), linear-gradient(90deg, var(--bg-bright) 2px, transparent 2px), linear-gradient(var(--bg-bright) 1px, transparent 1px), linear-gradient(90deg, var(--bg-bright) 1px, var(--bg-transcluscent) 1px);
background-size: 50px 50px, 50px 50px, 10px 10px, 10px 10px;
background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px;
animation: move-diagonal 5s linear infinite;
}
#brushimg-preview { flex: 1; }

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@ -0,0 +1,97 @@
window.addEventListener("load", () => {
let dropzone = document.querySelector("#dropzone");
dropzone.addEventListener("dragenter", handle_drag_enter);
dropzone.addEventListener("dragleave", handle_drag_leave);
dropzone.addEventListener("dragover", handle_drag_over);
dropzone.addEventListener("drop", handle_drop);
document.querySelector("#brushimg-tsv").addEventListener("click", select_output);
let button_copy = document.querySelector("#brushimg-copy")
button_copy.addEventListener("click", () => {
select_output();
button_copy.innerHTML = document.execCommand("copy") ? "Copied!" : "Failed to copy :-(";
})
});
function select_output() {
let output = document.querySelector("#brushimg-tsv");
let selection = window.getSelection();
if (selection.rangeCount > 0)
selection.removeAllRanges();
let range = document.createRange();
range.selectNode(output);
selection.addRange(range);
}
function handle_drag_enter(event) {
event.target.classList.add("dropzone-active");
}
function handle_drag_leave(event) {
event.target.classList.remove("dropzone-active");
}
function handle_drag_over(event) {
event.preventDefault();
}
function handle_drop(event) {
event.stopPropagation();
event.preventDefault();
event.target.classList.remove("dropzone-active");
let image_file = null;
image_file = event.dataTransfer.files[0];
let reader = new FileReader();
reader.addEventListener("load", function(_event) {
let image = new Image();
image.src = reader.result;
image.addEventListener("load", () => handle_new_image(image));
document.querySelector("#brushimg-preview").src = image.src;
});
reader.readAsDataURL(image_file);
return false;
}
function image2pixels(image) {
let canvas = document.createElement("canvas"),
ctx = canvas.getContext("2d");
canvas.width = image.width;
canvas.height = image.height;
ctx.drawImage(image, 0, 0);
return ctx.getImageData(0, 0, image.width, image.height);
}
function handle_new_image(image) {
let tsv = pixels2tsv(image2pixels(image));
document.querySelector("#brushimg-stats").value = `${image.width} x ${image.height} | ${image.width * image.height} pixels`;
document.querySelector("#brushimg-tsv").value = tsv;
}
function round(number, decimal_places = 0) {
let multiplier = Math.pow(10, decimal_places);
return Math.round(number * multiplier) / multiplier;
}
function pixels2tsv(pixels) {
let result = "";
for(let y = 0; y < pixels.height; y++) {
let row = [];
for(let x = 0; x < pixels.width; x++) {
row.push(round(pixels.data[((y*pixels.width + x) * 4) + 3], 3));
}
result += row.join(`\t`) + `\n`;
}
return result;
}

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@ -0,0 +1,34 @@
---
layout: theme.njk
title: Image to brush converter
---
<section class="panel-generic">
<h1>Image to sculpting brush converter</h1>
<p>Convert any image to a sculpting brush here! The <strong>alpha (opacity) channel</strong> is used to determine the weight of the brush - <strong>all colour is ignored</strong>.</p>
</section>
<section id="dropzone" class="bigbox panel-generic">
<h2>Input</h2>
<p>Drop your image here.</p>
<img id="brushimg-preview" alt="" />
<output id="brushimg-stats"></output>
</section>
<section class="panel-generic">
<h2>Output</h2>
<p>Paste the output below into a text file in <code>worldeditadditions/lib/sculpt/brushes</code> with the file extension <code>.txt</code> and restart your Minetest server for the brush to be recognised.</p>
<p class="text-centre">
<button id="brushimg-copy" class="bigbutton">Copy</button>
</p>
<pre><output id="brushimg-tsv"><em>(your output will appear here as soon as you drop an image above)</em></output></pre>
</section>
<script src="./img2brush.js"></script>