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cleanup code a bit

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mourner
2012-08-09 23:12:30 +03:00
parent 79737cdab5
commit 17522d8fc3
1 changed files with 24 additions and 12 deletions
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src/DistanceGrid.js
+24 -12
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@@ -8,13 +8,15 @@ L.DistanceGrid = function (cellSize) {
L.DistanceGrid.prototype = {
addObject: function (obj, point) {
var x = Math.floor(point.x / this._cellSize),
y = Math.floor(point.y / this._cellSize),
row = this._grid[y] = this._grid[y] || {},
cell = row[x] = row[x] || [];
var x = this._getCoord(point.x),
y = this._getCoord(point.y),
grid = this._grid,
row = grid[y] = grid[y] || {},
cell = row[x] = row[x] || [];
obj._dGridCell = cell;
obj._dGridPoint = point;
cell.push(obj);
},
@@ -25,18 +27,20 @@ L.DistanceGrid.prototype = {
removeObject: function (obj) {
var oldCell = obj._dGridCell,
point = obj._dGridPoint,
x, y, i, len;
point = obj._dGridPoint,
i, len, x, y;
for (i = 0, len = oldCell.length; i < len; i++) {
if (oldCell[i] === obj) {
oldCell.splice(i, 1);
if (len === 1) {
x = Math.floor(point.x / this._cellSize),
y = Math.floor(point.y / this._cellSize),
x = this._getCoord(point.x);
y = this._getCoord(point.y);
delete this._grid[y][x];
}
break;
}
}
@@ -44,14 +48,16 @@ L.DistanceGrid.prototype = {
eachObject: function (fn, context) {
var i, j, k, len, row, cell, removed,
grid = this._grid;
grid = this._grid;
for (i in grid) {
if (grid.hasOwnProperty(i)) {
row = grid[i];
for (j in row) {
if (row.hasOwnProperty(j)) {
cell = row[j];
for (k = 0, len = cell.length; k < len; k++) {
removed = fn.call(context, cell[k]);
if (removed) {
@@ -66,16 +72,18 @@ L.DistanceGrid.prototype = {
},
getNearObject: function (point) {
var x = Math.floor(point.x / this._cellSize),
y = Math.floor(point.y / this._cellSize),
var x = this._getCoord(point.x),
y = this._getCoord(point.y),
i, j, k, row, cell, len, obj;
for (i = y - 1; i <= y + 1; i++) {
row = this._grid[i];
if (row) {
for (j = x - 1; j <= x + 1; j++) {
cell = row[j];
if (cell) {
for (k = 0, len = cell.length; k < len; k++) {
obj = cell[k];
if (this._sqDist(obj._dGridPoint, point) < this._sqCellSize) {
@@ -90,9 +98,13 @@ L.DistanceGrid.prototype = {
return null;
},
_getCoord: function (x) {
return Math.floor(x / this._cellSize);
},
_sqDist: function (p, p2) {
var dx = p2.x - p.x,
dy = p2.y - p.y;
dy = p2.y - p.y;
return dx * dx + dy * dy;
}
};