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Implement xRel / yRel cel-positioning logic when compositing

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Jeremy Penner 2023-12-23 14:21:24 -05:00
parent 79f14b8d39
commit 3fe16c7e49
1 changed files with 14 additions and 6 deletions
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20
index.js
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@ -307,20 +307,28 @@ const compositeCels = (cels) => {
let minY = Number.POSITIVE_INFINITY let minY = Number.POSITIVE_INFINITY
let maxX = Number.NEGATIVE_INFINITY let maxX = Number.NEGATIVE_INFINITY
let maxY = Number.NEGATIVE_INFINITY let maxY = Number.NEGATIVE_INFINITY
let xRel = 0
let yRel = 0
for (let cel of cels) { for (let cel of cels) {
minX = Math.min(minX, cel.xOffset) minX = Math.min(minX, cel.xOffset + xRel)
minY = Math.min(minY, -cel.yOffset) minY = Math.min(minY, -(cel.yOffset + yRel))
maxX = Math.max(maxX, cel.width + cel.xOffset) maxX = Math.max(maxX, cel.width + cel.xOffset + xRel)
maxY = Math.max(maxY, cel.height - cel.yOffset) maxY = Math.max(maxY, cel.height - (cel.yOffset + yRel))
} const container = document.getElementById("cels") xRel += cel.xRel
yRel += cel.yRel
}
const w = (maxX - minX) * 8 const w = (maxX - minX) * 8
const h = maxY - minY const h = maxY - minY
const canvas = makeCanvas(w, h) const canvas = makeCanvas(w, h)
const ctx = canvas.getContext("2d") const ctx = canvas.getContext("2d")
xRel = 0
yRel = 0
for (let cel of cels) { for (let cel of cels) {
ctx.drawImage(cel.canvas, (cel.xOffset - minX) * 8, -cel.yOffset - minY) ctx.drawImage(cel.canvas, (cel.xOffset + xRel - minX) * 8, -(cel.yOffset + yRel) - minY)
xRel += cel.xRel
yRel += cel.yRel
} }
return { canvas: canvas, xOffset: minX * 8, yOffset: minY } return { canvas: canvas, xOffset: minX * 8, yOffset: minY }
} }