Jump to content
View in the app

A better way to browse. Learn more.

Forge Forums

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Featured Replies

Posted

Hi,

 

I've been using isCollidedHorizontally to add ladder/spider-like behavior onLivingUpdate, but the entity takes damage when coming down even if I set fallDistance to 0. I tried sending packets to the client only to discover that the code was only being called client side.

// in LivingUpdateEvent, no preceding 'if' statements
if (event.entity.isCollidedHorizontally)
{
if (event.entity.isSneaking())
{
	event.entity.motionY = -0.1F;
        }
else
{
	event.entity.motionY = 0.1F;
 }
         // This part doesn't work; player still takes damage when coming down even when sneaking
event.entity.fallDistance = 0.0F;
}

As you can see, it's very simple code that allows the player to climb up and down walls. I checked out Entity's moveEntity method since that's where isCollidedHorizontally is set, but didn't see anything there to suggest it is client-side only; however, it's obviously only called client side.

 

Is there a way to avoid updating the server from a client packet but still get it to work?

Maybe your code is too simple.

I am not sure that isCollidedHorizontally would be true if the entity is only going up or down.

Which would mean that fallDistance is not set to 0.

  • Author

Perhaps, but I've used event.entity.fallDistance = 0 with other checks and it works properly for both client and server, whereas here, I'm able to climb up and down but I still take damage on fall. This suggests that isCollidedHorizontally is only true on the client side.

 

Printing output to the console within the 'if' statement proves this to be true:

event.entity.fallDistance = 0.0F;
if (!event.entity.worldObj.isRemote)
System.out.println("[EVENT] Server side: On update fall distance: " + event.entity.fallDistance);
else
System.out.println("[EVENT] Client side: On update fall distance: " + event.entity.fallDistance);

Only the client side prints.

  • Author

It's true when going up/down because the player is still moving forward, just like the way ladders/vines work.

 

I'm still not sure why it's only true client side. This has the unfortunate side-effect of forcing me to update the server with client information, which I don't want to do if I can help it.

 

Any ideas how to avoid that?

You right, but is isCollidedHorizontally true when the player is falling ?

Which is when the fallDistance will be used...

  • Author

It's true when pressing forward into a block, even when going down, but NOT falling, you are right. That's what is weird. If I go up like a ladder and come down like a ladder, I still take damage even though I technically wasn't falling, except that 'isOnLadder' is not true, since I'm not on a ladder. That's why I was trying to use onCollidedHorizontally, as it is still true coming down or I wouldn't be able to come down using the sneak key, I would just fall.

 

So the problem is, even though onCollidedHorizontally is true client side, allowing me to move correctly, server side it is NOT true, so it thinks I'm falling and increments fallDistance regardless of whether I'm actually falling or not, because I have downward motion and the server doesn't know about onCollidedHorizontally, from what I can tell.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

Important Information

By using this site, you agree to our Terms of Use.

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.