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performance optim

This commit is contained in:
Leijurv 2018-08-05 11:50:23 -04:00
parent 8ee641f310
commit a858882f02
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GPG Key ID: 44A3EA646EADAC6A
1 changed files with 25 additions and 17 deletions
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42
src/main/java/baritone/bot/pathing/calc/openset/BinaryHeapOpenSet.java
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@ -61,35 +61,43 @@ public class BinaryHeapOpenSet implements IOpenSet {
array[1].heapPosition = 1;
array[size] = null;
size--;
downHeap(1);
result.heapPosition = -1;
if (size < 2) {
return result;
}
int index = 1;
int smallerChild = 2;
double cost = array[index].combinedCost;
do {
int right = smallerChild + 1;
double smallerChildCost = array[smallerChild].combinedCost;
if (right <= size) {
double rightChildCost = array[right].combinedCost;
if (smallerChildCost > rightChildCost) {
smallerChild = right;
smallerChildCost = rightChildCost;
}
}
if (cost <= smallerChildCost) {
break;
}
swap(index, smallerChild);
index = smallerChild;
smallerChild = index << 1;
} while (smallerChild <= size);
return result;
}
private void upHeap(int index) {
int parent = index >>> 1;
while (index > 1 && array[parent].combinedCost > array[index].combinedCost) {
double cost = array[index].combinedCost;
while (index > 1 && array[parent].combinedCost > cost) {
swap(index, parent);
index = parent;
parent = index >>> 1;
}
}
private void downHeap(int index) {
int smallerChild = 2;
while (smallerChild <= size) {
int right = smallerChild + 1;
if (right <= size && array[smallerChild].combinedCost > array[right].combinedCost) {
smallerChild = right;
}
if (array[index].combinedCost <= array[smallerChild].combinedCost) {
break;
}
swap(index, smallerChild);
index = smallerChild;
smallerChild = index << 1;
}
}
/**
* Swaps the elements at the specified indices.