尝试修复引擎音效问题

src/main/java/com/atsuishio/superbwarfare/Mod.java

@@ -127,7 +127,7 @@ public class Mod {
         MolangVariable.register();
 
         MobileVehicleEntity.trackSound = vehicle -> Minecraft.getInstance().getSoundManager().play(new VehicleSoundInstance.TrackSound(vehicle));
-        MobileVehicleEntity.engineSound = vehicle -> Minecraft.getInstance().getSoundManager().play(new VehicleSoundInstance.EngineSound(vehicle, vehicle.getEngineSound()));
+        MobileVehicleEntity.engineSound = vehicle -> Minecraft.getInstance().getSoundManager().play(new VehicleSoundInstance.EngineSound(vehicle));
     }
 
 }

src/main/java/com/atsuishio/superbwarfare/client/sound/VehicleSoundInstance.java

@@ -82,13 +82,14 @@ public abstract class VehicleSoundInstance extends AbstractTickableSoundInstance
     }
 
     public static class EngineSound extends VehicleSoundInstance {
-        public EngineSound(MobileVehicleEntity mobileVehicle, SoundEvent soundEvent) {
+
-            super(soundEvent, Minecraft.getInstance(), mobileVehicle);
+        public EngineSound(MobileVehicleEntity mobileVehicle) {
+            super(mobileVehicle.getEngineSound(), Minecraft.getInstance(), mobileVehicle);
         }
 
         @Override
         protected boolean canPlay(MobileVehicleEntity mobileVehicle) {
-            return true;
+            return mobileVehicle.engineRunning();
         }
 
         @Override

src/main/java/com/atsuishio/superbwarfare/entity/vehicle/base/MobileVehicleEntity.java

@@ -88,6 +88,8 @@ public abstract class MobileVehicleEntity extends EnergyVehicleEntity implements
     public double lastTickVerticalSpeed;
     public int collisionCoolDown;
 
+    private boolean wasEngineRunning = false;
+
     public float rudderRot;
     public float rudderRotO;
 
@@ -136,18 +138,6 @@ public abstract class MobileVehicleEntity extends EnergyVehicleEntity implements
         super(pEntityType, pLevel);
     }
 
-    @Override
-    public void playerTouch(Player pPlayer) {
-        if (pPlayer.isCrouching() && !this.level().isClientSide) {
-            double entitySize = pPlayer.getBbWidth() * pPlayer.getBbHeight();
-            double thisSize = this.getBbWidth() * this.getBbHeight();
-            double f = Math.min(entitySize / thisSize, 2);
-            double f1 = Math.min(thisSize / entitySize, 4);
-            this.setDeltaMovement(this.getDeltaMovement().add(new Vec3(pPlayer.position().vectorTo(this.position()).toVector3f()).scale(0.15 * f * pPlayer.getDeltaMovement().length())));
-            pPlayer.setDeltaMovement(pPlayer.getDeltaMovement().add(new Vec3(this.position().vectorTo(pPlayer.position()).toVector3f()).scale(0.1 * f1 * pPlayer.getDeltaMovement().length())));
-        }
-    }
-
     @Override
     public void processInput(short keys) {
         leftInputDown
@@ -170,8 +160,25 @@ public abstract class MobileVehicleEntity extends EnergyVehicleEntity implements
                 = (keys & 0b100000000) > 0;
     }
 
+    @Override
+    public void playerTouch(Player pPlayer) {
+        if (pPlayer.isCrouching() && !this.level().isClientSide) {
+            double entitySize = pPlayer.getBbWidth() * pPlayer.getBbHeight();
+            double thisSize = this.getBbWidth() * this.getBbHeight();
+            double f = Math.min(entitySize / thisSize, 2);
+            double f1 = Math.min(thisSize / entitySize, 4);
+            this.setDeltaMovement(this.getDeltaMovement().add(new Vec3(pPlayer.position().vectorTo(this.position()).toVector3f()).scale(0.15 * f * pPlayer.getDeltaMovement().length())));
+            pPlayer.setDeltaMovement(pPlayer.getDeltaMovement().add(new Vec3(this.position().vectorTo(pPlayer.position()).toVector3f()).scale(0.1 * f1 * pPlayer.getDeltaMovement().length())));
+        }
+    }
+
     @Override
     public void baseTick() {
+        if (!this.wasEngineRunning && this.engineRunning() && this.level().isClientSide()) {
+            engineSound.accept(this);
+        }
+        this.wasEngineRunning = this.engineRunning();
+
         turretYRotO = this.getTurretYRot();
         turretXRotO = this.getTurretXRot();
 
@@ -223,9 +230,6 @@ public abstract class MobileVehicleEntity extends EnergyVehicleEntity implements
         // 更新前一时刻的速度
         previousVelocity = currentVelocity;
 
-
-        engineSound.accept(this);
-
         double direct = (90 - calculateAngle(this.getDeltaMovement(), this.getViewVector(1))) / 90;
         setVelocity(Mth.lerp(0.4, getVelocity(), getDeltaMovement().horizontalDistance() * direct * 20));
 
@@ -881,6 +885,10 @@ public abstract class MobileVehicleEntity extends EnergyVehicleEntity implements
         return false;
     }
 
+    public boolean engineRunning() {
+        return Math.abs(this.entityData.get(POWER)) > 0;
+    }
+
     @Override
     protected void defineSynchedData(SynchedEntityData.Builder builder) {
         super.defineSynchedData(builder);