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6988bec0ee15e4bbf488efaebf12ac68604d4a6d
AkarinMC/patches-1.16.5/removed-server/0012-Asynchronous-pathfinding.patch
foss-mc 6988bec0ee fix: update dependencies and rebranding
2025-02-18 18:18:07 +11:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=84=97=E3=84=A0=CB=8B=20=E3=84=91=E3=84=A7=CB=8A?=
<tsao-chi@the-lingo.org>
Date: Sun, 5 Apr 2020 13:01:13 +0800
Subject: [PATCH] Asynchronous pathfinding
diff --git a/src/main/java/net/minecraft/server/EntityInsentient.java b/src/main/java/net/minecraft/server/EntityInsentient.java
index f01a305083bd755369d1efe6d41832639eb6040d..2afa9d7385c2b74dada9636dcc79beb8f7f54a64 100644
--- a/src/main/java/net/minecraft/server/EntityInsentient.java
+++ b/src/main/java/net/minecraft/server/EntityInsentient.java
@@ -686,7 +686,7 @@ public abstract class EntityInsentient extends EntityLiving {
this.goalSelector.doTick();
//this.world.getMethodProfiler().exit(); // Akarin - remove caller
//this.world.getMethodProfiler().enter("navigation"); // Akarin - remove caller
- this.navigation.c();
+ this.navigation.tickAsync(); // Akarin - Async pathfinder
//this.world.getMethodProfiler().exit(); // Akarin - remove caller
//this.world.getMethodProfiler().enter("mob tick"); // Akarin - remove caller
this.mobTick();
diff --git a/src/main/java/net/minecraft/server/Navigation.java b/src/main/java/net/minecraft/server/Navigation.java
index abf450917e605972d84cb603b966feb013ae0002..4f7f40d5e7050d9b2da29c6e6efe7c5bef560d55 100644
--- a/src/main/java/net/minecraft/server/Navigation.java
+++ b/src/main/java/net/minecraft/server/Navigation.java
@@ -183,7 +183,7 @@ public class Navigation extends NavigationAbstract {
double d3 = (double) j2 + 0.5D - vec3d.z;
if (d2 * d0 + d3 * d1 >= 0.0D) {
- PathType pathtype = this.o.a(this.b, i2, j - 1, j2, this.a, l, i1, j1, true, true);
+ PathType pathtype = this.o.a(this.o.a, i2, j - 1, j2, this.a, l, i1, j1, true, true); // Akarin - use chunk cache
if (pathtype == PathType.WATER) {
return false;
diff --git a/src/main/java/net/minecraft/server/NavigationAbstract.java b/src/main/java/net/minecraft/server/NavigationAbstract.java
index b763d7f37eb7c9ff1326ef27c478454f3dd574d4..7f061ec1d809337c697794f2f08a06f1ebcaa39f 100644
--- a/src/main/java/net/minecraft/server/NavigationAbstract.java
+++ b/src/main/java/net/minecraft/server/NavigationAbstract.java
@@ -29,6 +29,15 @@ public abstract class NavigationAbstract {
private int r;
private float s;
private final Pathfinder t; public Pathfinder getPathfinder() { return this.t; } // Paper - OBFHELPER
+ // Akarin start - Async pathfinder
+ private long lastPathfindAsync;
+ private static final java.util.concurrent.ExecutorService pathfindExecutor =
+ java.util.concurrent.Executors.newSingleThreadExecutor(
+ new com.google.common.util.concurrent.ThreadFactoryBuilder()
+ .setDaemon(true)
+ .setNameFormat("StarLink Pathfinder - %d")
+ .build());
+ // Akarin end
public NavigationAbstract(EntityInsentient entityinsentient, World world) {
this.g = Vec3D.a;
@@ -78,6 +87,40 @@ public abstract class NavigationAbstract {
}
}
+ // Akarin start - Async pathfinder, copied from above with modification
+ public void doPathfindAsync() {
+ if (this.b.getTime() - this.lastPathfindAsync > 20L) {
+ if (this.q != null) {
+ this.lastPathfindAsync = this.b.getTime();
+
+ // Bake chunk cache
+ float f = (float) this.p.getValue();
+ BlockPosition blockposition = new BlockPosition(this.a);
+ int k = (int) (f + (float) 8);
+ ChunkCache cache = new ChunkCache(this.b, blockposition.b(-k, -k, -k), blockposition.b(k, k, k));
+
+ // Execute directly if we already have a path entity, or compute one
+ if (this.c != null && !this.c.b()) {
+ doTickAsync(this.c);
+ return;
+ }
+
+ pathfindExecutor.execute(() -> {
+ PathEntity result = findPathAsync(cache, java.util.Collections.singleton(this.q), this.r);
+ NavigationAbstract.this.b.getMinecraftServer().processQueue.add(() -> {
+ if (result != null && result.k() != null)
+ this.q = result.k();
+
+ NavigationAbstract.this.c = result;
+ });
+ });
+ }
+ } else {
+ // Execute directly, keep behaviour with vanilla, see the original doTick method
+ doTickAsync(this.c);
+ }
+ }
+ // Akarin end
@Nullable
public final PathEntity calculateDestination(double d0, double d1, double d2) { return a(d0, d1, d2, 0); } public final PathEntity a(double d0, double d1, double d2, int i) { // Paper - OBFHELPER
@@ -153,6 +196,17 @@ public abstract class NavigationAbstract {
return pathentity;
}
}
+ // Akarin start - Async pathfinder, copied and edited from above with only pathfinding
+ protected PathEntity findPathAsync(ChunkCache cache, Set<BlockPosition> set, int j) {
+ if (this.a.locY() < 0.0D) {
+ return null;
+ } else if (!this.a()) {
+ return null;
+ } else {
+ return this.t.a(cache, this.a, set, f, j, this.s);
+ }
+ }
+ // Akarin end
public boolean a(double d0, double d1, double d2, double d3) {
return this.a(this.a(d0, d1, d2, 1), d3);
@@ -246,6 +300,37 @@ public abstract class NavigationAbstract {
}
}
}
+ // Akarin start - Async pathfinder, copied from above
+ public void tickAsync() {
+ ++this.e;
+ this.doPathfindAsync();
+ }
+
+ // This was copied from above partly with param
+ public void doTickAsync(PathEntity pathEntity) {
+ if (shouldContinuePathfind(pathEntity))
+ return;
+
+ Vec3D vec3d;
+ if (this.a()) {
+ this.applyPath(pathEntity);
+ } else if (pathEntity.f() < pathEntity.e()) {
+ vec3d = this.b();
+ Vec3D vec3d1 = pathEntity.a(this.a, pathEntity.f());
+
+ if (vec3d.y > vec3d1.y && !this.a.onGround && MathHelper.floor(vec3d.x) == MathHelper.floor(vec3d1.x) && MathHelper.floor(vec3d.z) == MathHelper.floor(vec3d1.z))
+ pathEntity.c(pathEntity.f() + 1);
+ }
+
+ if (shouldContinuePathfind(pathEntity))
+ return;
+
+ vec3d = pathEntity.a((Entity) this.a);
+ BlockPosition blockposition = new BlockPosition(vec3d);
+
+ this.a.getControllerMove().a(vec3d.x, this.b.getType(blockposition.down()).isAir() ? vec3d.y : PathfinderNormal.a((IBlockAccess) this.b, blockposition), vec3d.z, this.d);
+ }
+ // Akarin End - Async pathfinder
protected void l() {
Vec3D vec3d = this.b();
@@ -259,6 +344,20 @@ public abstract class NavigationAbstract {
this.a(vec3d);
}
+ // Akarin start - Async pathfinder, copied from above with param
+ protected void applyPath(PathEntity pathEntity) {
+ Vec3D vec3d = this.b();
+
+ this.l = this.a.getWidth() > 0.75F ? this.a.getWidth() / 2.0F : 0.75F - this.a.getWidth() / 2.0F;
+ Vec3D vec3d1 = pathEntity.g();
+
+ if (Math.abs(this.a.locX() - (vec3d1.x + 0.5D)) < (double) this.l && Math.abs(this.a.locZ() - (vec3d1.z + 0.5D)) < (double) this.l && Math.abs(this.a.locY() - vec3d1.y) < 1.0D) {
+ pathEntity.c(pathEntity.f() + 1);
+ }
+
+ this.applyPath0(pathEntity, vec3d);
+ }
+ // Akarin end
protected void a(Vec3D vec3d) {
if (this.e - this.f > 100) {
@@ -293,10 +392,50 @@ public abstract class NavigationAbstract {
}
}
+ // Akarin start - Async pathfinder, copied from above with param
+ protected void applyPath0(PathEntity pathEntity, Vec3D vec3d) {
+ if (this.e - this.f > 100) {
+ if (vec3d.distanceSquared(this.g) < 2.25D) {
+ this.o();
+ }
+
+ this.f = this.e;
+ this.g = vec3d;
+ }
+
+ if (!pathEntity.b()) {
+ Vec3D vec3d1 = pathEntity.g();
+
+ if (vec3d1.equals(this.h)) {
+ this.i += SystemUtils.getMonotonicMillis() - this.j;
+ } else {
+ this.h = vec3d1;
+ double d0 = vec3d.f(this.h);
+
+ this.k = this.a.dt() > 0.0F ? d0 / (double) this.a.dt() * 1000.0D : 0.0D;
+ }
+
+ if (this.k > 0.0D && (double) this.i > this.k * 3.0D) {
+ this.h = Vec3D.a;
+ this.i = 0L;
+ this.k = 0.0D;
+ this.o();
+ }
+
+ this.j = SystemUtils.getMonotonicMillis();
+ }
+
+ }
+ // Akarin end
public boolean m() {
return this.c == null || this.c.b();
}
+ // Akarin start - Async pathfinder, copied from above with param
+ public static boolean shouldContinuePathfind(PathEntity pathEntity) {
+ return pathEntity == null || pathEntity.b();
+ }
+ // Akarin end
public boolean n() {
return !this.m();
diff --git a/src/main/java/net/minecraft/server/Pathfinder.java b/src/main/java/net/minecraft/server/Pathfinder.java
index 71b96943d865105f279dda613b7ac6b3ffed793b..5313f00d33349d5aa712f2da02033a247415d7bd 100644
--- a/src/main/java/net/minecraft/server/Pathfinder.java
+++ b/src/main/java/net/minecraft/server/Pathfinder.java
@@ -27,7 +27,7 @@ public class Pathfinder {
}
@Nullable
- public PathEntity a(ChunkCache chunkcache, EntityInsentient entityinsentient, Set<BlockPosition> set, float f, int i, float f1) {
+ public synchronized PathEntity a(ChunkCache chunkcache, EntityInsentient entityinsentient, Set<BlockPosition> set, float f, int i, float f1) { // Akarin - synchronized
this.a.a();
this.e.a(chunkcache, entityinsentient);
PathPoint pathpoint = this.e.b();
diff --git a/src/main/java/net/minecraft/server/PathfinderTurtle.java b/src/main/java/net/minecraft/server/PathfinderTurtle.java
index 59b1fe289c57b9e9f21b74c26cc1836255dad78b..1790878ae9ac33be86bed0b962b8171bf666d119 100644
--- a/src/main/java/net/minecraft/server/PathfinderTurtle.java
+++ b/src/main/java/net/minecraft/server/PathfinderTurtle.java
@@ -148,7 +148,7 @@ public class PathfinderTurtle extends PathfinderNormal {
if (pathtype == PathType.OPEN) {
AxisAlignedBB axisalignedbb = new AxisAlignedBB((double) i - d2 + 0.5D, (double) j + 0.001D, (double) k - d2 + 0.5D, (double) i + d2 + 0.5D, (double) ((float) j + this.b.getHeight()), (double) k + d2 + 0.5D);
- if (!this.b.world.getCubes(this.b, axisalignedbb)) {
+ if (!this.a.getCubes(this.b, axisalignedbb)) { // Akarin - use chunk cache
return null;
}
diff --git a/src/main/java/net/minecraft/server/PathfinderWater.java b/src/main/java/net/minecraft/server/PathfinderWater.java
index 075b63ef57a1528118f03a00c7156b3cb7744969..a3473ddcfe15d329eba78bbd60c00541cb1b88bb 100644
--- a/src/main/java/net/minecraft/server/PathfinderWater.java
+++ b/src/main/java/net/minecraft/server/PathfinderWater.java
@@ -63,7 +63,7 @@ public class PathfinderWater extends PathfinderAbstract {
@Override
protected PathPoint a(int i, int j, int k) {
PathPoint pathpoint = null;
- PathType pathtype = this.a(this.b.world, i, j, k);
+ PathType pathtype = this.a(this.a, i, j, k); // Akarin - use chunk cache
float f = this.b.a(pathtype);
if (f >= 0.0F) {
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