From 302752860c7c10f02479727fe3d6d3b086177604 Mon Sep 17 00:00:00 2001
From: mat <git@matdoes.dev>
Date: Thu, 24 Jul 2025 04:42:52 -0530
Subject: update movement code for 1.21.5 changes

fixes grim flags
---
 azalea-physics/src/lib.rs | 39 ++++++++++++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 11 deletions(-)

(limited to 'azalea-physics/src')

diff --git a/azalea-physics/src/lib.rs b/azalea-physics/src/lib.rs
index 772b9b86..9481cef7 100644
--- a/azalea-physics/src/lib.rs
+++ b/azalea-physics/src/lib.rs
@@ -15,10 +15,10 @@ use azalea_core::{
     tick::GameTick,
 };
 use azalea_entity::{
-    Attributes, InLoadedChunk, Jumping, LocalEntity, LookDirection, OnClimbable, Physics, Pose,
-    Position, metadata::Sprinting, move_relative,
+    Attributes, EntityKindComponent, InLoadedChunk, Jumping, LocalEntity, LookDirection,
+    OnClimbable, Physics, Pose, Position, metadata::Sprinting, move_relative,
 };
-use azalea_registry::Block;
+use azalea_registry::{Block, EntityKind};
 use azalea_world::{Instance, InstanceContainer, InstanceName};
 use bevy_app::{App, Plugin};
 use bevy_ecs::prelude::*;
@@ -66,12 +66,17 @@ pub fn ai_step(
             &LookDirection,
             &Sprinting,
             &InstanceName,
+            &EntityKindComponent,
         ),
         (With<LocalEntity>, With<InLoadedChunk>),
     >,
     instance_container: Res<InstanceContainer>,
 ) {
-    for (mut physics, jumping, position, look_direction, sprinting, instance_name) in &mut query {
+    for (mut physics, jumping, position, look_direction, sprinting, instance_name, entity_kind) in
+        &mut query
+    {
+        let is_player = **entity_kind == EntityKind::Player;
+
         // vanilla does movement interpolation here, doesn't really matter much for a
         // bot though
 
@@ -79,14 +84,29 @@ pub fn ai_step(
             physics.no_jump_delay -= 1;
         }
 
-        if physics.velocity.x.abs() < 0.003 {
-            physics.velocity.x = 0.;
+        if is_player {
+            if physics.velocity.horizontal_distance_squared() < 9.0e-6 {
+                physics.velocity.x = 0.;
+                physics.velocity.z = 0.;
+            }
+        } else {
+            if physics.velocity.x.abs() < 0.003 {
+                physics.velocity.x = 0.;
+            }
+            if physics.velocity.z.abs() < 0.003 {
+                physics.velocity.z = 0.;
+            }
         }
+
         if physics.velocity.y.abs() < 0.003 {
             physics.velocity.y = 0.;
         }
-        if physics.velocity.z.abs() < 0.003 {
-            physics.velocity.z = 0.;
+
+        if is_player {
+            // handled in local_player_ai_step
+        } else {
+            physics.x_acceleration *= 0.98;
+            physics.z_acceleration *= 0.98;
         }
 
         if jumping == Some(&Jumping(true)) {
@@ -128,9 +148,6 @@ pub fn ai_step(
             physics.no_jump_delay = 0;
         }
 
-        physics.x_acceleration *= 0.98;
-        physics.z_acceleration *= 0.98;
-
         // TODO: freezing, pushEntities, drowning damage (in their own systems,
         // after `travel`)
     }
-- 
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