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Remove point abstraction and just use array for that on kdtree.

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Andrey Antukh 2016-04-09 13:07:00 +03:00
parent 78e7f57655
commit d64253dd1b
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GPG key ID: 4DFEBCB8316A8B95
1 changed files with 14 additions and 51 deletions
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65
vendor/kdtree.js vendored
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@ -12,7 +12,6 @@
*/
goog.provide("kdtree");
goog.provide("kdtree.Point2d");
goog.provide("kdtree.KDTree");
goog.require('goog.array');
@ -25,36 +24,6 @@ goog.scope(function() {
const assertNumber = goog.asserts.assertNumber;
const every = goog.array.every;
class Point2d {
constructor(x, y, data) {
this.type = Point2d;
this.x = x;
this.y = y;
this.data = data;
}
static empty() {
return new Point2d(0, 0, null);
}
get(index) {
if (index === 0) {
return this.x;
} else {
return this.y;
}
}
set(index, value) {
if (index === 0) {
this.x = value;
} else {
this.y = value;
}
return this;
}
}
class Node {
constructor(obj, dimension, parent) {
this.obj = obj;
@ -77,7 +46,7 @@ goog.scope(function() {
}
points.sort((a, b) => {
return a.get(dim) - b.get(dim);
return a[dim] - b[dim];
});
const median = Math.floor(points.length / 2);
@ -102,15 +71,15 @@ goog.scope(function() {
return node;
}
own = node.obj.get(dim);
own = node.obj[dim];
left = findMin(node.left, dim);
right = findMin(node.right, dim);
min = node;
if (left !== null && left.obj.get(dim) < own) {
if (left !== null && left.obj[dim] < own) {
min = left;
}
if (right !== null && right.obj.get(dim) < min.obj.get(dim)) {
if (right !== null && right.obj[dim] < min.obj[dim]) {
min = right;
}
return min;
@ -121,7 +90,7 @@ goog.scope(function() {
return parent;
}
if (point.get(dim) < node.obj.get(dim)) {
if (point[dim] < node.obj[dim]) {
return innerSearch(point, node.left, node);
} else {
return innerSearch(point, node.right, node);
@ -137,7 +106,7 @@ goog.scope(function() {
return node;
}
if (point.get(node.dimension) < node.obj.get(node.dimension)) {
if (point[node.dimension] < node.obj[node.dimension]) {
return nodeSearch(point, node.left);
} else {
return nodeSearch(point, node.right);
@ -167,7 +136,7 @@ goog.scope(function() {
insertPosition);
const dimension = insertPosition.dimension;
if (point.get(dimension) < insertPosition.obj.get(dimension)) {
if (point[dimension] < insertPosition.obj[dimension]) {
insertPosition.left = newNode;
} else {
insertPosition.right = newNode;
@ -188,7 +157,7 @@ goog.scope(function() {
const pdim = node.parent.dimension;
if (node.obj.get(pdim) < node.parent.obj.get(pdim)) {
if (node.obj[pdim] < node.parent.obj[pdim]) {
node.parent.left = null;
} else {
node.parent.right = null;
@ -227,10 +196,9 @@ goog.scope(function() {
bestNodes = new BinaryHeap(function (e) { return -e[1]; });
const nearestSearch = (node) => {
const ownDistance = self.metric(point, node.obj);
const ownDistance = this.metric(point, node.obj);
const dimension = node.dimension;
const pointType = node.obj.type;
const linearPoint = pointType.empty();
const linearPoint = [null, null];
let otherChild, linearDistance, bestChild, i;
@ -243,9 +211,9 @@ goog.scope(function() {
for (i = 0; i < this.dimensions; i += 1) {
if (i === node.dimension) {
linearPoint.set(i, point.get(i));
linearPoint[i] = point[i];
} else {
linearPoint.set(i, node.obj.get(i));
linearPoint[i] = node.obj[i]
}
}
@ -263,7 +231,7 @@ goog.scope(function() {
} else if (node.left === null) {
bestChild = node.right;
} else {
if (point.get(dimension) < node.obj.get(dimension)) {
if (point[dimension] < node.obj[dimension]) {
bestChild = node.left;
} else {
bestChild = node.right;
@ -454,11 +422,7 @@ goog.scope(function() {
};
function distance2d(a, b){
return Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2);
}
function point2d(x, y, data) {
return new Point2d(x, y, data);
return Math.pow(a[0] - b[0], 2) + Math.pow(a[1] - b[1], 2);
}
function create2d(points) {
@ -469,6 +433,5 @@ goog.scope(function() {
kdtree.KDTree = KDTree;
// Factory functions
kdtree.point2d = point2d;
kdtree.create2d = create2d;
});