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change fingerprinting algorithm

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This commit is contained in:
Stewart Allen 2021-07-10 21:19:56 -04:00
commit aeb8d9512a
6 changed files with 79 additions and 20 deletions
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45
src/geo/polygons.js
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@ -871,37 +871,62 @@
flatten(polys).sort((a,b) => {
return a.area() > b.area();
}).forEach(p => {
finger.push(p.area());
finger.push(p.perimeter());
finger.push(p.bounds);
// finger.push(p.area());
// finger.push(p.perimeter());
// finger.push(p.bounds);
finger.push({
c: p.circularityDeep(),
p: p.perimeterDeep(),
b: p.bounds
});
});
return finger;
}
// compare fingerprint arrays
function fingerprintCompare(a, b) {
// true if array is the same object
if (a === b) {
return true;
}
// fail on missing array
if (!a || !b) {
return false;
}
// require identical length arrays
if (a.length !== b.length) {
return false;
}
for (let i=0; i<a.length; i += 3) {
if (Math.abs(a[i] - b[i]) > 0.001) {
for (let i=0; i<a.length; i++) {
let ra = a[i];
let rb = b[i];
// test circularity
if (Math.abs(ra.c - rb.c) > 0.001) {
return false;
}
if (Math.abs(a[i+1] - b[i+1]) > 0.0001) {
// test perimeter
if (Math.abs(ra.p - rb.p) > 0.001) {
return false;
}
if (Math.abs(a[i+2].centerx() - b[i+2].centerx()) > 0.0001) {
return false;
}
if (Math.abs(a[i+2].centery() - b[i+2].centery()) > 0.0001) {
// test bounds
if (ra.b.delta(rb.b) > 0.001) {
return false;
}
}
// for (let i=0; i<a.length; i += 3) {
// if (Math.abs(a[i] - b[i]) > 0.001) {
// return false;
// }
// if (Math.abs(a[i+1] - b[i+1]) > 0.0001) {
// return false;
// }
// if (Math.abs(a[i+2].centerx() - b[i+2].centerx()) > 0.0001) {
// return false;
// }
// if (Math.abs(a[i+2].centery() - b[i+2].centery()) > 0.0001) {
// return false;
// }
// }
return true;
}