rkgk/static/painter.js

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export class Painter {
constructor(paintArea) {
this.paintArea = paintArea;
}
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renderBrushToWall(haku, centerX, centerY, wall) {
haku.resetVm();
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let evalResult = haku.evalBrush();
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if (evalResult.status != "ok")
return { status: "error", phase: "eval", result: evalResult };
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let left = centerX - this.paintArea / 2;
let top = centerY - this.paintArea / 2;
let leftChunk = Math.floor(left / wall.chunkSize);
let topChunk = Math.floor(top / wall.chunkSize);
let rightChunk = Math.ceil((left + this.paintArea) / wall.chunkSize);
let bottomChunk = Math.ceil((top + this.paintArea) / wall.chunkSize);
for (let chunkY = topChunk; chunkY < bottomChunk; ++chunkY) {
for (let chunkX = leftChunk; chunkX < rightChunk; ++chunkX) {
let x = Math.floor(-chunkX * wall.chunkSize + centerX);
let y = Math.floor(-chunkY * wall.chunkSize + centerY);
let chunk = wall.getOrCreateChunk(chunkX, chunkY);
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let renderResult = haku.renderValue(chunk.pixmap, x, y);
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if (renderResult.status != "ok") {
return { status: "error", phase: "render", result: renderResult };
}
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}
}
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for (let y = topChunk; y < bottomChunk; ++y) {
for (let x = leftChunk; x < rightChunk; ++x) {
let chunk = wall.getChunk(x, y);
chunk.syncFromPixmap();
}
}
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return { status: "ok" };
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}
}