wisplite/distant-horizons-sharded
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changed Math.pow usages with simpler (and possibly faster) x*x and 1 << x. reduced repetitions

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This commit is contained in:
cola98765
2021-10-24 10:28:35 +02:00
parent 6243201f2d
commit 4064155567
2 changed files with 24 additions and 10 deletions
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src/main/java/com/seibel/lod/objects/VerticalLevelContainer.java
+2 -2
View File
@@ -134,7 +134,7 @@ public class VerticalLevelContainer implements LevelContainer
index++;
maxVerticalData = inputData[index];
index++;
size = (int) Math.pow(2, LodUtil.REGION_DETAIL_LEVEL - detailLevel);
size = 1 << (LodUtil.REGION_DETAIL_LEVEL - detailLevel);
int x = size * size * maxVerticalData;
this.dataContainer = new long[x];
for (int i = 0; i < x; i++)
@@ -217,7 +217,7 @@ public class VerticalLevelContainer implements LevelContainer
{
/*
StringBuilder stringBuilder = new StringBuilder();
int size = (int) Math.pow(2, LodUtil.REGION_DETAIL_LEVEL - detailLevel);
int size = 1 << (LodUtil.REGION_DETAIL_LEVEL - detailLevel);
stringBuilder.append(detailLevel);
stringBuilder.append(DATA_DELIMITER);
for (int x = 0; x < size; x++)
src/main/java/com/seibel/lod/util/LevelPosUtil.java
+22 -8
View File
@@ -149,6 +149,10 @@ public class LevelPosUtil
return convert(detailLevel, pos, LodUtil.CHUNK_DETAIL_LEVEL);
}
public static int myPow2(int x)
{
return x*x;
}
public static int maxDistance(byte detailLevel, int posX, int posZ, int playerPosX, int playerPosZ)
{
@@ -159,10 +163,15 @@ public class LevelPosUtil
int endPosX = startPosX + width;
int endPosZ = startPosZ + width;
int maxDistance = (int) Math.sqrt(Math.pow(playerPosX - startPosX, 2) + Math.pow(playerPosZ - startPosZ, 2));
maxDistance = Math.max(maxDistance, (int) Math.sqrt(Math.pow(playerPosX - startPosX, 2) + Math.pow(playerPosZ - endPosZ, 2)));
maxDistance = Math.max(maxDistance, (int) Math.sqrt(Math.pow(playerPosX - endPosX, 2) + Math.pow(playerPosZ - startPosZ, 2)));
maxDistance = Math.max(maxDistance, (int) Math.sqrt(Math.pow(playerPosX - endPosX, 2) + Math.pow(playerPosZ - endPosZ, 2)));
startPosX = myPow2(playerPosX - startPosX);
startPosZ = myPow2(playerPosZ - startPosZ);
endPosX = myPow2(playerPosX - endPosX);
endPosZ = myPow2(playerPosZ - endPosZ);
int maxDistance = (int) Math.sqrt(startPosX + startPosZ);
maxDistance = Math.max(maxDistance, (int) Math.sqrt(startPosX + endPosZ));
maxDistance = Math.max(maxDistance, (int) Math.sqrt(endPosX + startPosZ));
maxDistance = Math.max(maxDistance, (int) Math.sqrt(endPosX + endPosZ));
return maxDistance;
}
@@ -205,10 +214,15 @@ public class LevelPosUtil
}
else
{
int minDistance = (int) Math.sqrt(Math.pow(playerPosX - startPosX, 2) + Math.pow(playerPosZ - startPosZ, 2));
minDistance = Math.min(minDistance, (int) Math.sqrt(Math.pow(playerPosX - startPosX, 2) + Math.pow(playerPosZ - endPosZ, 2)));
minDistance = Math.min(minDistance, (int) Math.sqrt(Math.pow(playerPosX - endPosX, 2) + Math.pow(playerPosZ - startPosZ, 2)));
minDistance = Math.min(minDistance, (int) Math.sqrt(Math.pow(playerPosX - endPosX, 2) + Math.pow(playerPosZ - endPosZ, 2)));
startPosX = myPow2(playerPosX - startPosX);
startPosZ = myPow2(playerPosZ - startPosZ);
endPosX = myPow2(playerPosX - endPosX);
endPosZ = myPow2(playerPosZ - endPosZ);
int minDistance = (int) Math.sqrt(startPosX + startPosZ);
minDistance = Math.min(minDistance, (int) Math.sqrt(startPosX + endPosZ));
minDistance = Math.min(minDistance, (int) Math.sqrt(endPosX + startPosZ));
minDistance = Math.min(minDistance, (int) Math.sqrt(endPosX + endPosZ));
return minDistance;
}
}