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Better jittering for coincident nodes.

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commit 067959832875993b721a27a322c8944bf5dcd1a3 1 parent 51b8e02
@mbostock mbostock authored
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2  d3.js
@@ -1,4 +1,4 @@
-(function(){d3 = {version: "1.13.3"}; // semver
+(function(){d3 = {version: "1.13.4"}; // semver
if (!Date.now) Date.now = function() {
return +new Date();
};
View
13 d3.layout.js
@@ -168,9 +168,9 @@ d3.layout.force = function() {
function repulse(node, kc) {
return function(quad, x1, y1, x2, y2) {
- if (quad.point != node) {
- var dx = (quad.cx - node.x) || Math.random(),
- dy = (quad.cy - node.y) || Math.random(),
+ if (quad.point !== node) {
+ var dx = quad.cx - node.x,
+ dy = quad.cy - node.y,
dn = 1 / Math.sqrt(dx * dx + dy * dy);
/* Barnes-Hut criterion. */
@@ -181,7 +181,7 @@ d3.layout.force = function() {
return true;
}
- if (quad.point) {
+ if (quad.point && isFinite(dn)) {
var k = kc * dn * dn;
node.x += dx * k;
node.y += dy * k;
@@ -476,6 +476,11 @@ function d3_layout_forceAccumulate(quad) {
});
}
if (quad.point) {
+ // jitter internal nodes that are coincident
+ if (!quad.leaf) {
+ quad.point.x += Math.random() - .5;
+ quad.point.y += Math.random() - .5;
+ }
quad.count++;
cx += quad.point.x;
cy += quad.point.y;
View
2  d3.layout.min.js
@@ -1 +1 @@
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View
2  src/core/core.js
@@ -1 +1 @@
-d3 = {version: "1.13.3"}; // semver
+d3 = {version: "1.13.4"}; // semver
View
13 src/layout/force.js
@@ -16,9 +16,9 @@ d3.layout.force = function() {
function repulse(node, kc) {
return function(quad, x1, y1, x2, y2) {
- if (quad.point != node) {
- var dx = (quad.cx - node.x) || Math.random(),
- dy = (quad.cy - node.y) || Math.random(),
+ if (quad.point !== node) {
+ var dx = quad.cx - node.x,
+ dy = quad.cy - node.y,
dn = 1 / Math.sqrt(dx * dx + dy * dy);
/* Barnes-Hut criterion. */
@@ -29,7 +29,7 @@ d3.layout.force = function() {
return true;
}
- if (quad.point) {
+ if (quad.point && isFinite(dn)) {
var k = kc * dn * dn;
node.x += dx * k;
node.y += dy * k;
@@ -324,6 +324,11 @@ function d3_layout_forceAccumulate(quad) {
});
}
if (quad.point) {
+ // jitter internal nodes that are coincident
+ if (!quad.leaf) {
+ quad.point.x += Math.random() - .5;
+ quad.point.y += Math.random() - .5;
+ }
quad.count++;
cx += quad.point.x;
cy += quad.point.y;
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