[MC-6584] Y capped during uber cannon launch Created: 08/Jan/13  Updated: 25/Jan/13  Resolved: 25/Jan/13

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Snapshot 13w01b, Snapshot 13w03a, Snapshot 13w04a
Fix Version/s: None

Type: Bug
Reporter: Ultimate Omicron Assignee: Unassigned
Resolution: Works As Intended Votes: 0
Labels: fly, speed, tnt

Attachments: PNG File 2013-01-08_22.03.05.png     File Redstone.rar     PNG File Untitled.png     Text File crash-after.txt     Text File crash-during.txt    
Confirmation Status: Unconfirmed
Game Mode: Creative

 Description   

I built a TNT cannon with 80 focused charges. When firing at an angle of 45ยบ i blasted off to approximately y=620, at which point my character acted like if it hit a solid ceiling, sliding sideways and falling. When i used half charge, i blasted off normally and hit a vector of y:1059,5.

Then i built a larger cannon with 160 charges, at which the full-blast cap was seemingly reduced to approximately y=310. Character instantly hits this height and slides parallel to the ground until coming to a halt and falling to the ground approximately 500m away from the cannon.

I attached a scheme of the observed trajectory. On multiplayer, all that happens is that after (latency) milliseconds the player is teleported back to the explosion origin with a speed of zero like if it never happened.



 Comments   
Comment by Tails [ 25/Jan/13 ]

Thanks for the update, resolving as intended.

Comment by Ultimate Omicron [ 25/Jan/13 ]

Uploaded the correct trajectory diagram.

Comment by Ultimate Omicron [ 25/Jan/13 ]

News. I finally understood what happens; These shots have an oblique launch angle, so the player hits unloaded chunks. Due to the new mechanic implemented to avoid teleported players falling into the void, the Y speed is discarded when they exit the loaded area. As soon as the chunks load, the player then falls with gravity.

So i believe this is working as intended

Comment by Ultimate Omicron [ 08/Jan/13 ]

Thanks

I gave it another shot just to be sure, was capped at y:372.

Comment by Kumasasa [ 08/Jan/13 ]

Shot height and width is quite inconsistent.
Depending on the standing point when shot i flew up to > 700, see screenshot

Comment by FireHunterX [ 08/Jan/13 ]

I went up and up and up and up...
Never stopped until I started to go down. I went really far from the cannon though.

I didn't abruptly stop either. Just kept going.
Nice cannon though. Good job.

Comment by Ultimate Omicron [ 08/Jan/13 ]

Done

Comment by FireHunterX [ 08/Jan/13 ]

Go ahead.

Comment by Ultimate Omicron [ 08/Jan/13 ]

Attached crash report during fire, and crash report after firing. Do you want me to attach the map with the loaded cannon? It's 1.9 MB.

Comment by Kumasasa [ 08/Jan/13 ]

Please force a crash by pressing F3 + C for 10 seconds while ingame and attach the crash report here.

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