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stack handles negative zero #1967

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stack handles negative zero #1967

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6 changes: 3 additions & 3 deletions src/transforms/stack.js
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Original file line number Diff line number Diff line change
Expand Up @@ -104,9 +104,9 @@ function stack(x, y = one, kx, ky, {offset, order, reverse}, options) {
if (reverse) stack.reverse();
for (const i of stack) {
const y = Y[i];
if (y < 0) yn = Y2[i] = (Y1[i] = yn) + y;
else if (y > 0) yp = Y2[i] = (Y1[i] = yp) + y;
else Y2[i] = Y1[i] = yp; // NaN or zero
if (y < 0 || 1 / y === -Infinity) yn = Y2[i] = (Y1[i] = yn) + y; // negative maybe zero
else if (y >= 0) yp = Y2[i] = (Y1[i] = yp) + y; // positive maybe zero
else Y2[i] = Y1[i] = yp; // NaN
}
}
facetstacks.push(stacks);
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