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This commit is contained in:
Éric Lemoine
2013-03-25 18:15:00 +01:00
parent 588e0c1cdc
commit de1575e457
9 changed files with 269 additions and 137 deletions
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34
src/ol/array.js
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@@ -33,9 +33,12 @@ ol.array.binaryFindNearest = function(arr, target) {
/**
* @param {Array.<number>} arr Array.
* @param {number} target Target.
* @param {number} direction 0 means return the nearest, > 0
* means return the largest nearest, < 0 means return the
* smallest nearest.
* @return {number} Index.
*/
ol.array.linearFindNearest = function(arr, target) {
ol.array.linearFindNearest = function(arr, target, direction) {
var n = arr.length;
if (arr[0] <= target) {
return 0;
@@ -43,17 +46,34 @@ ol.array.linearFindNearest = function(arr, target) {
return n - 1;
} else {
var i;
for (i = 1; i < n; ++i) {
if (arr[i] == target) {
return i;
} else if (arr[i] < target) {
if (arr[i - 1] - target < target - arr[i]) {
if (direction > 0) {
for (i = 1; i < n; ++i) {
if (arr[i] < target) {
return i - 1;
} else {
}
}
} else if (direction < 0) {
for (i = 1; i < n; ++i) {
if (arr[i] <= target) {
return i;
}
}
} else {
for (i = 1; i < n; ++i) {
if (arr[i] == target) {
return i;
} else if (arr[i] < target) {
if (arr[i - 1] - target < target - arr[i]) {
return i - 1;
} else {
return i;
}
}
}
}
// We should never get here, but the compiler complains
// if it finds a path for which no number is returned.
goog.asserts.assert(false);
return n - 1;
}
};