Random Chitchat 2017

[NiLSPACE]

@xoft, you might like this: http://javascript.nilspace.nl/Cuberite/G...zer_Image/

I took the previous GrownVisualizer and made it possible to put images in it. There are a few bugs though. For once, it can't handle images where the width and height aren't the same.

[xoft]

Looks great And you seem to like the algorithm quite a lot, giving it this much attention
Only the UI part is somewhat lacking, there's no instructions, no description of the choices etc. - it's a good PoC, but not a good end-product. Of course, as a toy, anything goes.

[NiLSPACE]

I love the algorithm. I had the idea that you can put an existing image in it for a while but never had the time to execute it I just quickly hacked it in, so it doesn't really look good at the moment

I was also curious if I could use a similar approach to generate a heightmap. I want to test that out tomorrow.

[xoft]

A heightmap generated by this, plus some minor post-processing, is what the Steppy generator does.
https://forum.cuberite.org/thread-1801-p...l#pid18783

[Seadragon91]

I tested clang UB and it shows warnings.
Examples:
src/Noise/Noise.h:225:16: runtime error: signed integer overflow: 511 * 1423092208 cannot be represented in type 'int'
src/Noise/Noise.h:236:9: runtime error: left shift of negative value -2052869158

Don't know if they are a problem or not.

[xoft]

That might produce a portability issue (different terrain generated on different platforms for the same config / seed), but in general it shouldn't affect the server stability. It could be fixed, probably, with a ton of reinterpret_cast between int and unsigned, but I don't think it's worth the trouble now.

[xoft]

But hey, that's a great tool. Does it report anything else besides the Noise subsystem?

[Seadragon91]

Played a little around and it shows warnings in Noise, ComposableGenerator, CompoGen and Tracer, division by zero. Most warnings about negative shift and integer overflow.

[Seadragon91]

Clang has many nice tools http://clang.llvm.org/docs/index.html.

[Seadragon91]

Created a new branch in pycraft to ddos the server with commands in-game.
Branch: https://github.com/Seadragon91/pyCraft/t...s_commands

Setup server:
1. Use webadmin to add the players (bot1 to bot 5) and set the rank from them to Admin
2. Deactivate authentication
3. Run the python file run.py

Currently I have a few assertions, verify warnings and access to objects that are nullptr.

I think this is a good start to find problems with commands in-game.