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slightly better poly equivalence check

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This commit is contained in:
Stewart Allen 2021-06-22 11:23:45 -04:00
commit 8141a3aa12
1 changed files with 14 additions and 4 deletions
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18
src/geo/polygon.js
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@ -1772,6 +1772,16 @@
return tl;
};
PRO.areaDiff = function(poly) {
let a1 = this.area(),
a2 = poly.area();
return (a1 > a2) ? a2 / a1 : a1 / a2;
};
PRO.areaOrLength = function(poly) {
return this.length === poly.length || this.areaDiff(poly) > 0.98;
};
/**
* return logical OR of two polygons' enclosed areas
*
@ -1812,16 +1822,16 @@
if (
src[0].isEqual2D(dst[0]) &&
src[1].isEqual2D(dst[1]) &&
Math.abs(src[0].poly.area() - dst[0].poly.area()) < 0.01 &&
Math.abs(src[1].poly.area() - dst[1].poly.area()) < 0.01
src[0].poly.areaOrLength(dst[0].poly) &&
src[1].poly.areaOrLength(dst[1].poly)
) {
return null;
} else if (debug) {
console.log("union debug", {
src,
dst,
d0: Math.abs(src[0].poly.area() - dst[0].poly.area()),
d1: Math.abs(src[1].poly.area() - dst[1].poly.area()),
d0: src[0].poly.areaDiff(dst[0].poly),
d1: src[1].poly.areaDiff(dst[1].poly),
m0: src[0].isEqual2D(dst[0]),
m1: src[1].isEqual2D(dst[1])
});