brian/d3-spring-model
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Code Issues 3 Releases 4 Activity

Fix bug divide by 0 by adding jiggle

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This commit is contained in:
Pitchaya Boonsarngsuk
2018-01-31 15:59:00 +00:00
parent 8422175f0a
commit e700df5059
3 changed files with 7 additions and 7 deletions
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10
src/interpolation/interpCommon.js
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@@ -1,4 +1,5 @@
import {pointOnCircle, sumDistError} from "./helpers";
import jiggle from "../jiggle";
export function placeNearToNearestNeighbour(node, nearNeighbour, radius, sampleSubset, realDistances) {
let
@@ -43,8 +44,6 @@ export function placeNearToNearestNeighbour(node, nearNeighbour, radius, sampleS
return sumDistError(pointOnCircle(nearNeighbour.x, nearNeighbour.y, angle, radius), sampleSubset, realDistances);
});
let newPoint = pointOnCircle(nearNeighbour.x, nearNeighbour.y, angle, radius);
// console.log(newPoint);
node.x = newPoint.x;
node.y = newPoint.y;
@@ -65,9 +64,10 @@ function sumForcesToSample(node, samples, sampleCache) {
var sample = samples[i];
if(sample === node) continue;
let x = node.x - sample.x,
y = node.y - sample.y,
l = Math.sqrt(x * x + y * y);
// jiggle so l won't be zero and divide by zero error after this
x = node.x - sample.x || jiggle();
y = node.y - sample.y || jiggle();
l = Math.sqrt(x * x + y * y);
l = (l - sampleCache[i]) / l;
x *= l, y *= l;

2
src/link.js
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@@ -22,7 +22,7 @@ export default function(links) {
for (var k = 0, n = nodes.length, source, target, i, j, x, y, l; k < iterations; ++k) {
// For each link
for (i = 1; i < n; i++) for (j = 0; j < i; j++) {
// jiggle so it wont divide / multiply by zero after this
// jiggle so l won't be zero and divide by zero error after this
source = nodes[i];
target = nodes[j];
x = target.x + target.vx - source.x - source.vx || jiggle();

2
src/neighbourSamplingDistance.js
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@@ -79,7 +79,7 @@ export default function () {
*/
function setVelocity(source, target, dist, alpha) {
let x, y, l;
// jiggle so it wont divide / multiply by zero after this
// jiggle so l won't be zero and divide by zero error after this
x = target.x + target.vx - source.x - source.vx || jiggle();
y = target.y + target.vy - source.y - source.vy || jiggle();
l = Math.sqrt(x * x + y * y);