RainWarrior

<blockstate> == {
  "forge_marker": 1,
  "defaults": <variant>, // optional, added to all variants
  "variants": {
    "<property>": {
    "<value>": <variant> // variant definition for the specified value of this property; variants for multiple values can be specified.
  },
    "<variant name>": <variant>, // variant definition for the full variant string
    "<variant name>": [<variant1>, ...], // array of definitions for the full variant - result will be the random variant
  }

RainWarrior

{
  "parameters":  { "name": <time_value>, ... },
  "clips":       { "name": <clip>, ... },
  "states":      [ "name", ... ],
  "transitions": { "name_from": "name_to", ... },
  "start_state": "name"
}

<time_value> ::=
  <number>                                    // result = number; Constant value.

Pokechu22

It's possible to use create an MCP installation for versions of Minecraft where there hasn't been a full MCP release. It takes a little bit of manual setup, but the end result is highly useful.

1. Download and extract the most recent MCP build from http://www.modcoderpack.com/. (Currently, the latest build is http://www.modcoderpack.com/files/mcp940.zip)

2. Edit version.cfg in the conf folder, and change ClientVersion and ServerVersion to the version you want (for instance, 1.12.2).

3. Download the SRG zip for the version you want; these can generally be found at http://mcpbot.bspk.rs/mcp/<version>/mcp-<version>-srg.zip (for example, http://mcpbot.bspk.rs/mcp/1.11.2/mcp-1.11.2-srg.zip) or at http://files.minecraftforge.net/maven/de/oceanlabs/mcp/mcp/<version>/mcp-<version>-srg.zip (for example, http://files.minecraftforge.net/maven/de/oceanlabs/mcp/mcp/1.12.2/mcp-1.12.2-srg.zip). (For 1.12.1 and 1.12.2, only the minecraftforge link works)

4. Extract that zip into the MCP conf folder, over

mcmod.info

[
{
  "modid": "buildcraftcore",
  "name": "BuildCraft",
  "version": "${version}",
  "mcversion": "${mcversion}",
  "description": "Extending Minecraft with pipes, auto-crafting, quarries, engines and much more!",
  "credits": "Created by SpaceToad",
  "logoFile": "assets/buildcraft/logo.png",
  "url": "http://www.mod-buildcraft.com/",

williewillus

// You can include this in your mod/a pack/whatever you want, as long as that work follows the Mojang EULA.
// The original source is viewable at https://gist.github.com/williewillus/a1a899ce5b0f0ba099078d46ae3dae6e

// This is a janky JSON generator, for porting from below 1.12 to 1.12.
// Simply replace calls to GameRegistry.addShapeless/ShapedRecipe with these methods, which will dump it to a json in RECIPE_DIR
// Also works with OD, replace GameRegistry.addRecipe(new ShapedOreRecipe/ShapelessOreRecipe with the same calls
// After you are done, call generateConstants()
// Note that in many cases, you can combine multiple old recipes into one, since you can now specify multiple possibilities for an ingredient without using the OD. See vanilla for examples.

	private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();

williewillus

This primer is licensed under CC0, do whatever you want.

BUT do note that this can be updated, so leave a link here so readers can see the updated information themselves.

1.13 and 1.14 are lumped together in this doc, you're on your own if you just want to go to 1.13 and not 1.14, for some reason.

1.15 stuff: https://gist.github.com/williewillus/30d7e3f775fe93c503bddf054ef3f93e

Things in Advance

• ResourceLocation now throw on non-snake-case names instead of silently lowercasing for you, so you probably should go and change all those string constants now. More precisely, domains must only contain alphanumeric lowercase, underscore (_), dash (-), or dot (.). Paths have the same restrictions, but can also contain forward slashes (/).

JamiesWhiteShirt

OpenGL calls, OpenGL state, and state leaks

Making OpenGL calls has a performance cost. It is therefore desirable to reduce the amount of calls.

OpenGL has global state. The state is modified by enabling/disabling blending/culling/alpha testing/etc, specifying the blend function, changing the cull face, etc.

A state leak happens when a method leaves OpenGL in a different state after being called. This is generally undesirable as it often breaks expectations about the OpenGL state in other methods.

Modifying the OpenGL state requires OpenGL calls. Minecraft is not particularly optimized for reducing the amount of OpenGL calls, but makes an attempt using GlStateManager.

GlStateManager

Earthcomputer

Decompiling

1. Clone MCPConfig from the GitHub repository.
2. In the root project directory, run gradlew :1.13:projectClientApplyPatches if you want to make a client side mod, or gradlew :1.13:projectServerApplyPatches if you want to make a server side mod.
3. Naviage into versions/1.13/projects/server (or client). There are a couple of fixes necessary to get the code to compile:
   1. There is a missing class mcp.MethodsReturnNonnullByDefault which you will have to manually add. A copy can be found here.
   2. If you're making a server-only mod, the anonymous classes in net.minecraft.item.ItemClock and net.minecraft.item.ItemCompass need to be modified to override the method in net.minecraft.item.IItemPropertyGetter. This is never actually called on the server so you can make a dummy implementation.
4. Copy versions/1.13/projects/server (or client) into a separate

unascribed

package com.unascribed.chipper;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL43.*;
import static org.lwjgl.system.MemoryUtil.*;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

mcenderdragon

If a command breaks, use --no-daemon as the ForgeGradle currently doesn't uses it

Setup MDK (For Modders who want to create a mod)

• Download the MDK from forge (Forge Test Version for 1.13)
• ./gradlew eclipse
• ./gradlew genEclipseRuns to generate the launch configuration
• (./gradlew genIntellijRuns for IntelliJ users)
• run this two times so the libs get properly linked
• Importing into IDE has not changed