PHP + Minecraft

PHP + Minecraft as given at SymfonyWorld 2020 on Dec 3, 2020

Transcript

1. PHP + Minecraft Doing unconventional stuff by combining PHP and Minecraft
2. What is Minecraft?
3. What is Minecraft?
4. What is Minecraft?
5. What is Minecraft?
6. What is Minecraft?
7. What is Minecraft?
8. What is Minecraft?
9. What is Minecraft?
10. What is Minecraft?
11. What is Minecraft?
12. What is Minecraft?
13. What is Minecraft?
14. What is Minecraft?
15. What is Minecraft?
16. What is Minecraft?
17. What is Minecraft?
18. What is Minecraft?
19. What is Minecraft?
20. What is Minecraft?
21. What is Minecraft?
22. What is Minecraft?
23. What is Minecraft?
24. What is Minecraft?
25. Two versions Bedrock • Windows • iOS • Android • Playstation • Xbox • Nintendo Switch Java • Windows • MacOS • Linux
26. PHP + Minecraft: Why? I like combining hobbies
27. PHP + Minecraft: Why? I like combining hobbies Programming
28. PHP + Minecraft: Why? I like combining hobbies Programming VR
29. PHP + Minecraft: Why? I like combining hobbies Programming Minecraft VR
30. PHP + Minecraft: Why? I like combining hobbies Programming Minecraft VR 3D Printing
31. PHP + Minecraft: Why? I like combining hobbies Programming Minecraft VR 3D Printing
32. PHP + Minecraft: Why? I like combining hobbies Programming Minecraft VR 3D Printing
33. PHP + Minecraft: Why? I like combining hobbies Programming Minecraft VR 3D Printing
34. First step: First look at the game files
35. First step: First look at the game files • Saves folder
36. First step: First look at the game files • Saves folder Each save folder has: • 9 subfolders, including the well named ‘data’ folder • icon.png, session lockfile
37. Data directory
38. Data directory • Worst name ever
39. Data directory • Worst name ever • But contains… maps?
40. Data directory • Worst name ever • But contains… maps? idcounts.dat map_0.dat map_1.dat map_2.dat etc.
41. What is a map?
42. What is a map?
43. What is a map?
44. map_0.dat • Notepad shows gibberish
45. map_0.dat • Notepad shows gibberish • Google to the rescue!
46. map_0.dat • Notepad shows gibberish • Google to the rescue! It’s.. NBT?
47. map_0.dat • Notepad shows gibberish • Google to the rescue! It’s.. NBT? Custom format, the map has: • colors • xCenter • zCenter • scale
48. What can we do with this? • Generate created maps outside of the game • Know where these are positioned • Put all of them next to each other to create a bigger map!
49. SlimMap • Open source project • Made with Symfony & Leaflet.js • Shows Maps made by players
50. SlimMap - Demo
51. We can get things out of the world... Minecraft Save Maps
52. We can get things out of the world... Minecraft Save Maps ???
53. Structure Blocks • Can Save parts of the world to the file system
54. Structure Blocks • Can Save parts of the world to the file system • Can Load them in from the file system
55. structure file • Ends with .nbt • Contains a set of blocks
56. structure file • Ends with .nbt • Contains a set of blocks • Also used by game itself to create structures like villages
57. structure file • Ends with .nbt • Contains a set of blocks • Also used by game itself to create structures like villages • Can be saved manually
58. structure file • Ends with .nbt • Contains a set of blocks • Also used by game itself to create structures like villages • Can be saved manually • Can be placed automatically
59. structure file blocks 0: pos: 0, 0, 0 Position of block
60. structure file blocks 0: pos: 0, 0, 0 Position of block state: 0 Index of block in palette
61. structure file blocks 0: pos: 0, 0, 0 Position of block state: 0 Index of block in palette palette All different blocks 0: name: minecraft:dirt
62. Minecraft Commands Extensive system that can do almost anything
63. Minecraft Commands Extensive system that can do almost anything Some examples: • Change weather • Kill mobs / players • Teleport mobs / players • Start / stop time • Give items, take items
64. Minecraft Commands Can be executed using • Chat, starting with /
65. Minecraft Commands Can be executed using • Chat, starting with / • Redstone
66. Minecraft Commands Can be executed using • Chat, starting with / • Redstone • Command line (servers-only)
67. Minecraft Commands Can be executed using • Chat, starting with / • Redstone • Command line (servers-only) • RCON (Send commands to a server)
68. RCON Execute Minecraft commands remotely • Send commands from any server
69. RCON Execute Minecraft commands remotely • Send commands from any server • Only needs host, port, password
70. RCON Execute Minecraft commands remotely • Send commands from any server • Only needs host, port, password • Composer package available
71. RCON - Security • Just a password is not that safe
72. RCON - Security • Just a password is not that safe • Do not use default port
73. RCON - Security • Just a password is not that safe • Do not use default port • If possible, use IP whitelisting in firewall
74. RCON - Examples Used for • Automatic whitelisting of users on paid servers
75. RCON - Examples Used for • Automatic whitelisting of users on paid servers • Interactive livestreams
76. Demo
77. What we just did Read a 1 x 1 x 1 structure file to use as a base
78. What we just did Find the palette and change name of the single block in it
79. What we just did Write the new block to an existing nbt file
80. What we just did Write a success message!
81. Resources Repository with information https://github.com/ThomasBerends/php-minecraft Composer package reading Minecraft’s file format https://github.com/rickselby/NBT Composer package for RCON connections https://github.com/thedudeguy/PHP-Minecraft-Rcon
82. A last note... • Most talks get hardly any feedback on Joind.in • It’s one of the best things you can do to improve a conference Please take 10 minutes of your time Give feedback
83. Questions?
84. Thank you! Any feedback is welcome! Twitter: @ThomasBerends