Increase arrow entity speed and bow draw speed.

[Darkorg69]

Long story short, I'm writing some mod which allows you to increase your arrow speed and bow draw speed.

Currently I'm handling this though events.

    @SubscribeEvent
    public void onArrowSpeed(@NotNull EntityJoinLevelEvent event) {
        if (event.getEntity() instanceof Arrow arrow) {
            if (arrow.getOwner() instanceof ServerPlayer serverPlayer) {
                serverPlayer.getCapability(PlayerCapabilityProvider.PLAYER_CAP).ifPresent(capability -> {
                    if (capability.isUnlocked(serverPlayer, ARROW_SPEED)) {
                        int level = capability.getLevel(serverPlayer, ARROW_SPEED);
                        //Level is value between 0 and 20;
                        if (level > 0) {
                            float modifier = 1.0F + level * 0.05F;
                            arrow.setDeltaMovement(arrow.getDeltaMovement().scale(modifier));
                        }
                    }
                });
            }
        }
    }

    @SubscribeEvent
    public void onBowDraw(@NotNull ArrowNockEvent event) {
        if (event.getEntity() instanceof ServerPlayer serverPlayer) {
            if (event.getBow().getItem() instanceof BowItem) {
                serverPlayer.getCapability(PlayerCapabilityProvider.PLAYER_CAP).ifPresent(capability -> {
                    if (capability.isUnlocked(serverPlayer, BOW_DRAW)) {
                        int level = capability.getLevel(serverPlayer, BOW_DRAW);
                        //Level is value between 0 and 10;
                        if (level > 0) {
                        //I have used AT to make this field public from protected;
                            serverPlayer.useItemRemaining -= level;
                        }
                    }
                });
            }
        }
    }
}

Problem I have is this delta movement data is not syncronized with the client, because when I shoot the arrow, at first the arrow goes in another direction and later actually syncs to it's real position.

In other words client-side animation is bugged/not properly synced.

To better visualize the problem I'm including a video:

https://streamable.com/x741gp

Any ideas how can I fix this?

[warjort]

Try setting

arrow.hasImpulse = true

after you change the velocity.

If you look at ServerEntity.sendChanges() that should cause it to send an update packet instead of waiting 20 ticks (the arrow's updateInterval).

[Darkorg69]

Already tried that, unfortunately it doesn't work. Also tried setting field arrow.hurtMarked = true; , but that also doesn't work.

[warjort]

I think your problem is caused by the ClientBoundSetEntityMotionPacket which clamps the maximum delta at +/- 3.9d

Obviously, the same clamp doesn't happen to the real data on the server so there is an inconsistency.