Fix particles being visible after world change when jumping in time (fixes #35)

src/main/java/com/replaymod/replay/mixin/MixinParticleManager.java

@@ -0,0 +1,31 @@
+package com.replaymod.replay.mixin;
+
+import net.minecraft.client.particle.Particle;
+import net.minecraft.client.particle.ParticleManager;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.Queue;
+
+@Mixin(ParticleManager.class)
+public abstract class MixinParticleManager {
+    @Shadow
+    private Queue<Particle> queueEntityFX;
+
+    /**
+     * This method additionally clears the queue of particles to be added when the world is changed.
+     * Otherwise particles from the previous world might show up in this one if they were spawned after
+     * the last tick in the previous world.
+     *
+     * @param world The new world
+     * @param ci Callback info
+     */
+    @Inject(method = "clearEffects", at = @At("HEAD"))
+    public void replayModReplay_clearParticleQueue(World world, CallbackInfo ci) {
+        queueEntityFX.clear();
+    }
+}

src/main/resources/mixins.replay.replaymod.json

@@ -3,6 +3,7 @@
   "package": "com.replaymod.replay.mixin",
   "mixins": [
     "MixinGuiSpectator",
+    "MixinParticleManager",
     "MixinPlayerControllerMP",
     "MixinRenderArmorStand",
     "MixinRenderArrow",