mirror of
https://github.com/placeAtlas/atlas.git
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74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
/*!
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* The 2022 r/place Atlas
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* Copyright (c) 2017 Roland Rytz <roland@draemm.li>
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* Copyright (c) 2022 Place Atlas contributors
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* Licensed under AGPL-3.0 (https://2022.place-atlas.stefanocoding.me/license.txt)
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*/
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function initOverlap() {
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window.renderBackground = renderBackground
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// const hovered = []
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resetEntriesList()
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renderBackground(atlas)
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render()
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document.addEventListener('timeupdate', () => {
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atlasDisplay = atlas.slice()
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resetEntriesList()
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renderBackground(atlasDisplay)
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render()
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})
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applyView()
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render()
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updateLines()
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if (window.location.hash) {
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updateViewFromHash()
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}
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function renderBackground(atlas) {
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backgroundContext.clearRect(0, 0, highlightCanvas.width, highlightCanvas.height)
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backgroundContext.fillStyle = "rgba(255, 255, 255, 1)"
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backgroundContext.fillRect(0, 0, highlightCanvas.width, highlightCanvas.height)
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for (const entry of atlas) {
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const path = entry.path
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backgroundContext.beginPath()
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if (path[0]) {
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backgroundContext.moveTo(path[0][0] - canvasOffset.x, path[0][1] - canvasOffset.y)
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}
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for (let p = 1; p < path.length; p++) {
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backgroundContext.lineTo(path[p][0] - canvasOffset.x, path[p][1] - canvasOffset.y)
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}
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backgroundContext.closePath()
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backgroundContext.fillStyle = "rgba(0, 0, 255, 0.2)"
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backgroundContext.fill()
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}
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const pixels = backgroundContext.getImageData(0, 0, backgroundCanvas.width, backgroundCanvas.height).data
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let blank = 0
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for (let i = 0; i < pixels.length; i += 4) {
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if (pixels[i] === 255) {
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blank++
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}
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}
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const blankPercentage = (blank / (canvasSize.x * canvasSize.y)) * 100
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console.info(blank + " blank pixels, which are " + blankPercentage.toPrecision(4) + "% of the canvas (" + (100 - blankPercentage).toPrecision(4) + "% mapped)")
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}
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}
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