Marc Mintel
5397309103
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36 lines
1.4 KiB
Plaintext
36 lines
1.4 KiB
Plaintext
import { mixNumber } from '../../utils/mix/number.mjs';
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import { complex } from '../../value/types/complex/index.mjs';
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const correctBoxShadow = {
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correct: (latest, { treeScale, projectionDelta }) => {
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const original = latest;
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const shadow = complex.parse(latest);
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// TODO: Doesn't support multiple shadows
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if (shadow.length > 5)
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return original;
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const template = complex.createTransformer(latest);
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const offset = typeof shadow[0] !== "number" ? 1 : 0;
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// Calculate the overall context scale
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const xScale = projectionDelta.x.scale * treeScale.x;
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const yScale = projectionDelta.y.scale * treeScale.y;
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shadow[0 + offset] /= xScale;
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shadow[1 + offset] /= yScale;
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/**
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* Ideally we'd correct x and y scales individually, but because blur and
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* spread apply to both we have to take a scale average and apply that instead.
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* We could potentially improve the outcome of this by incorporating the ratio between
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* the two scales.
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*/
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const averageScale = mixNumber(xScale, yScale, 0.5);
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// Blur
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if (typeof shadow[2 + offset] === "number")
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shadow[2 + offset] /= averageScale;
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// Spread
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if (typeof shadow[3 + offset] === "number")
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shadow[3 + offset] /= averageScale;
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return template(shadow);
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},
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};
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export { correctBoxShadow };
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