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add typecheck to avoid dangerous code that can cause infinite looping

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This commit is contained in:
bakedpotatolord 2025-06-18 20:15:34 -06:00
commit 7f12f929e5
1 changed files with 4 additions and 0 deletions
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4
src/geo/base.js
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@ -405,6 +405,10 @@ function center2pr(p1, p2, r, clockwise) {
// find angle difference between 0 and 2pi from n1 to n2 (signed depending on clock direction)
function thetaDiff(n1, n2, clockwise) {
let diff = n2 - n1;
if(typeof n1 != 'number' || typeof n2 != 'number') {
throw ("n1 and n2 must be numbers");
// this check is here because this causes an infinite loop when other value are provided
}
while (diff < -Math.PI) diff += Math.PI * 2;
while (diff > Math.PI) diff -= Math.PI * 2;
if (clockwise && diff > 0) diff -= Math.PI * 2;