Addon Recipes example

main.cpp

#include <jni.h>
#include "substrate.h"

#include "minecraftpe/recipes/Recipes.h"

#include "minecraftpe/item/Item.h"
#include "minecraftpe/tile/Tile.h"

static void (*_ToolRecipes$addRecipes)(Recipes* self);
static void ToolRecipes$addRecipes(Recipes* self) {
  
  self->addShapedRecipe(ItemInstance(Item::diamond), "/#/", "#/#", "/#/", {
    Recipes::Type('/', Item::stick);
    Recipes::Type('#', Tile::dirt);
  });
  
  _ToolRecipes$addRecipes(self);
}

JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved) {
  
  void* handle = dlopen("libminecraftpe.so", RTLD_LAZY);
  MSHookFunction((void*) dlsym(handle, "_ZN11ToolRecipes10addRecipesEP7Recipes"), (void*) &ToolRecipes$addRecipes, (void**) &_ToolRecipes$addRecipes);

}

Recipes.h

#pragma once

// this goes in minecraftpe/recipes/ !!!

#include <vector>
#include <string>

#include "minecraftpe/item/ItemInstance.h"

class Recipe;
class Tile;

class Recipes {
public:
	std::vector<Recipe*> recipes;
	class Type {
	public:
		Item* item;
		Tile* tile;
		ItemInstance itemInstance;
		char c;

		Type(char c, Item* i) : c(c), item(i) {}
		Type(char c, Tile* t) : c(c), tile(t) {}
		Type(char c, Item* i, int damage) : c(c), item(NULL), tile(NULL), itemInstance(i, 1, damage) {}
		Type(char c, Tile* t, int damage) : c(c), item(NULL), tile(NULL), itemInstance(t, 1, damage) {}
	};

	static Recipes* getInstance();
	void addShapedRecipe(ItemInstance const&, std::string const&, std::vector<Recipes::Type> const&);
	void addShapedRecipe(ItemInstance const&, std::string const&, std::string const&, std::vector<Recipes::Type> const&);
	void addShapedRecipe(ItemInstance const&, std::string const&, std::string const&, std::string const&, std::vector<Recipes::Type> const&);
	void addShapedRecipe(ItemInstance const&, std::vector<std::string> const&, std::vector<Recipes::Type> const&);
	void addShapedRecipe(std::vector<ItemInstance> const&, std::vector<std::string> const&, std::vector<Recipes::Type> const&);

	void addSingleIngredientRecipeItem(ItemInstance const&, ItemInstance const&);
};

What the "/#/", "#/#", "/#/"?

It's the same system as Minecraft PC recipes. Those are the shape strings (here '/' denotes a stick, and '#' is dirt).