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Spiral chunk loading

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This commit is contained in:
Németh Noel 2021-05-05 17:05:22 +02:00
parent 78937a6b0b
commit 5b41f3ffd0
1 changed files with 37 additions and 10 deletions
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47
src/main/java/net/minestom/server/utils/chunk/ChunkUtils.java
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@ -163,18 +163,45 @@ public final class ChunkUtils {
*/
@NotNull
public static long[] getChunksInRange(@NotNull Position position, int range) {
range = range * 2;
long[] visibleChunks = new long[MathUtils.square(range + 1)];
final int startLoop = -(range / 2);
final int endLoop = range / 2 + 1;
int counter = 0;
for (int x = startLoop; x < endLoop; x++) {
for (int z = startLoop; z < endLoop; z++) {
final int chunkX = getChunkCoordinate(position.getX() + Chunk.CHUNK_SIZE_X * x);
final int chunkZ = getChunkCoordinate(position.getZ() + Chunk.CHUNK_SIZE_Z * z);
visibleChunks[counter++] = getChunkIndex(chunkX, chunkZ);
long[] visibleChunks = new long[MathUtils.square(range * 2 + 1)];
int xDistance = 0;
int xDirection = 1;
int zDistance = 0;
int zDirection = -1;
int len = 1;
int corner = 0;
for (int i = 0; i < visibleChunks.length; i++) {
final int chunkX = getChunkCoordinate(xDistance * Chunk.CHUNK_SIZE_X + position.getX());
final int chunkZ = getChunkCoordinate(zDistance * Chunk.CHUNK_SIZE_Z + position.getZ());
visibleChunks[i] = getChunkIndex(chunkX, chunkZ);
if (corner % 2 == 0) {
// step on X axis
xDistance += xDirection;
if (Math.abs(xDistance) == len) {
// hit corner
corner++;
xDirection = -xDirection;
}
} else {
// step on Z axis
zDistance += zDirection;
if (Math.abs(zDistance) == len) {
// hit corner
corner++;
zDirection = -zDirection;
if (corner % 4 == 0) {
len++;
}
}
}
}
return visibleChunks;
}