minetest/src/craftdef.h

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/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef CRAFTDEF_HEADER
#define CRAFTDEF_HEADER
#include <string>
#include <iostream>
#include <vector>
#include <utility>
#include "gamedef.h"
#include "inventory.h"
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/*
Crafting methods.
The crafting method depends on the inventory list
that the crafting input comes from.
*/
enum CraftMethod
{
// Crafting grid
CRAFT_METHOD_NORMAL,
// Cooking something in a furnace
CRAFT_METHOD_COOKING,
// Using something as fuel for a furnace
CRAFT_METHOD_FUEL,
};
/*
The type a hash can be. The earlier a type is mentioned in this enum,
the earlier it is tried at crafting, and the less likely is a collision.
Changing order causes changes in behaviour, so know what you do.
*/
enum CraftHashType
{
// Hashes the normalized names of the recipe's elements.
// Only recipes without group usage can be found here,
// because groups can't be guessed efficiently.
CRAFT_HASH_TYPE_ITEM_NAMES,
// Counts the non-empty slots.
CRAFT_HASH_TYPE_COUNT,
// This layer both spares an extra variable, and helps to retain (albeit rarely used) functionality. Maps to 0.
// Before hashes are "initialized", all hashes reside here, after initialisation, none are.
CRAFT_HASH_TYPE_UNHASHED
};
const int craft_hash_type_max = (int) CRAFT_HASH_TYPE_UNHASHED;
/*
Input: The contents of the crafting slots, arranged in matrix form
*/
struct CraftInput
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{
CraftMethod method = CRAFT_METHOD_NORMAL;
unsigned int width = 0;
std::vector<ItemStack> items;
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CraftInput() {}
CraftInput(CraftMethod method_, unsigned int width_,
const std::vector<ItemStack> &items_):
method(method_), width(width_), items(items_)
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{}
std::string dump() const;
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};
/*
Output: Result of crafting operation
*/
struct CraftOutput
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{
// Used for normal crafting and cooking, itemstring
std::string item = "";
// Used for cooking (cook time) and fuel (burn time), seconds
float time = 0.0f;
CraftOutput() {}
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CraftOutput(const std::string &item_, float time_):
item(item_), time(time_)
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{}
std::string dump() const;
};
/*
A list of replacements. A replacement indicates that a specific
input item should not be deleted (when crafting) but replaced with
a different item. Each replacements is a pair (itemstring to remove,
itemstring to replace with)
Example: If ("bucket:bucket_water", "bucket:bucket_empty") is a
replacement pair, the crafting input slot that contained a water
bucket will contain an empty bucket after crafting.
Note: replacements only work correctly when stack_max of the item
to be replaced is 1. It is up to the mod writer to ensure this.
*/
struct CraftReplacements
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{
// List of replacements
std::vector<std::pair<std::string, std::string> > pairs;
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CraftReplacements():
pairs()
{}
CraftReplacements(const std::vector<std::pair<std::string, std::string> > &pairs_):
pairs(pairs_)
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{}
std::string dump() const;
};
/*
Crafting definition base class
*/
class CraftDefinition
{
public:
CraftDefinition(){}
virtual ~CraftDefinition(){}
// Returns type of crafting definition
virtual std::string getName() const=0;
// Checks whether the recipe is applicable
virtual bool check(const CraftInput &input, IGameDef *gamedef) const=0;
// Returns the output structure, meaning depends on crafting method
// The implementation can assume that check(input) returns true
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const=0;
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// the inverse of the above
virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const=0;
// Decreases count of every input item
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const=0;
virtual CraftHashType getHashType() const = 0;
virtual u64 getHash(CraftHashType type) const = 0;
// to be called after all mods are loaded, so that we catch all aliases
virtual void initHash(IGameDef *gamedef) = 0;
virtual std::string dump() const=0;
};
/*
A plain-jane (shaped) crafting definition
Supported crafting method: CRAFT_METHOD_NORMAL.
Requires the input items to be arranged exactly like in the recipe.
*/
class CraftDefinitionShaped: public CraftDefinition
{
public:
CraftDefinitionShaped() {}
CraftDefinitionShaped(
const std::string &output_,
unsigned int width_,
const std::vector<std::string> &recipe_,
const CraftReplacements &replacements_):
output(output_), width(width_), recipe(recipe_),
replacements(replacements_)
{}
virtual ~CraftDefinitionShaped(){}
virtual std::string getName() const;
virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
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virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const;
virtual CraftHashType getHashType() const;
virtual u64 getHash(CraftHashType type) const;
virtual void initHash(IGameDef *gamedef);
virtual std::string dump() const;
private:
// Output itemstring
std::string output = "";
// Width of recipe
unsigned int width = 1;
// Recipe matrix (itemstrings)
std::vector<std::string> recipe;
// Recipe matrix (item names)
std::vector<std::string> recipe_names;
// bool indicating if initHash has been called already
bool hash_inited = false;
// Replacement items for decrementInput()
CraftReplacements replacements;
};
/*
A shapeless crafting definition
Supported crafting method: CRAFT_METHOD_NORMAL.
Input items can arranged in any way.
*/
class CraftDefinitionShapeless: public CraftDefinition
{
public:
CraftDefinitionShapeless():
output(""), recipe(), hash_inited(false), replacements()
{}
CraftDefinitionShapeless(
const std::string &output_,
const std::vector<std::string> &recipe_,
const CraftReplacements &replacements_):
output(output_), recipe(recipe_),
hash_inited(false), replacements(replacements_)
{}
virtual ~CraftDefinitionShapeless(){}
virtual std::string getName() const;
virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
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virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const;
virtual CraftHashType getHashType() const;
virtual u64 getHash(CraftHashType type) const;
virtual void initHash(IGameDef *gamedef);
virtual std::string dump() const;
private:
// Output itemstring
std::string output;
// Recipe list (itemstrings)
std::vector<std::string> recipe;
// Recipe list (item names)
std::vector<std::string> recipe_names;
// bool indicating if initHash has been called already
bool hash_inited;
// Replacement items for decrementInput()
CraftReplacements replacements;
};
/*
Tool repair crafting definition
Supported crafting method: CRAFT_METHOD_NORMAL.
Put two damaged tools into the crafting grid, get one tool back.
There should only be one crafting definition of this type.
*/
class CraftDefinitionToolRepair: public CraftDefinition
{
public:
CraftDefinitionToolRepair():
additional_wear(0)
{}
CraftDefinitionToolRepair(float additional_wear_):
additional_wear(additional_wear_)
{}
virtual ~CraftDefinitionToolRepair(){}
virtual std::string getName() const;
virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
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virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const;
virtual CraftHashType getHashType() const { return CRAFT_HASH_TYPE_COUNT; }
virtual u64 getHash(CraftHashType type) const { return 2; }
virtual void initHash(IGameDef *gamedef) {}
virtual std::string dump() const;
private:
// This is a constant that is added to the wear of the result.
// May be positive or negative, allowed range [-1,1].
// 1 = new tool is completely broken
// 0 = simply add remaining uses of both input tools
// -1 = new tool is completely pristine
float additional_wear;
};
/*
A cooking (in furnace) definition
Supported crafting method: CRAFT_METHOD_COOKING.
*/
class CraftDefinitionCooking: public CraftDefinition
{
public:
CraftDefinitionCooking():
output(""), recipe(""), hash_inited(false), cooktime()
{}
CraftDefinitionCooking(
const std::string &output_,
const std::string &recipe_,
float cooktime_,
const CraftReplacements &replacements_):
output(output_), recipe(recipe_), hash_inited(false),
cooktime(cooktime_), replacements(replacements_)
{}
virtual ~CraftDefinitionCooking(){}
virtual std::string getName() const;
virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
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virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const;
virtual CraftHashType getHashType() const;
virtual u64 getHash(CraftHashType type) const;
virtual void initHash(IGameDef *gamedef);
virtual std::string dump() const;
private:
// Output itemstring
std::string output;
// Recipe itemstring
std::string recipe;
// Recipe item name
std::string recipe_name;
// bool indicating if initHash has been called already
bool hash_inited;
// Time in seconds
float cooktime;
// Replacement items for decrementInput()
CraftReplacements replacements;
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};
/*
A fuel (for furnace) definition
Supported crafting method: CRAFT_METHOD_FUEL.
*/
class CraftDefinitionFuel: public CraftDefinition
{
public:
CraftDefinitionFuel():
recipe(""), hash_inited(false), burntime()
{}
CraftDefinitionFuel(const std::string &recipe_,
float burntime_,
const CraftReplacements &replacements_):
recipe(recipe_),
hash_inited(false),
burntime(burntime_),
replacements(replacements_)
{}
virtual ~CraftDefinitionFuel(){}
virtual std::string getName() const;
virtual bool check(const CraftInput &input, IGameDef *gamedef) const;
virtual CraftOutput getOutput(const CraftInput &input, IGameDef *gamedef) const;
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virtual CraftInput getInput(const CraftOutput &output, IGameDef *gamedef) const;
virtual void decrementInput(CraftInput &input,
std::vector<ItemStack> &output_replacements, IGameDef *gamedef) const;
virtual CraftHashType getHashType() const;
virtual u64 getHash(CraftHashType type) const;
virtual void initHash(IGameDef *gamedef);
virtual std::string dump() const;
private:
// Recipe itemstring
std::string recipe;
// Recipe item name
std::string recipe_name;
// bool indicating if initHash has been called already
bool hash_inited;
// Time in seconds
float burntime;
// Replacement items for decrementInput()
CraftReplacements replacements;
};
/*
Crafting definition manager
*/
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class ICraftDefManager
{
public:
ICraftDefManager(){}
virtual ~ICraftDefManager(){}
// The main crafting function
virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
std::vector<ItemStack> &output_replacements,
bool decrementInput, IGameDef *gamedef) const=0;
virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output,
IGameDef *gamedef, unsigned limit=0) const=0;
// Print crafting recipes for debugging
virtual std::string dump() const=0;
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};
class IWritableCraftDefManager : public ICraftDefManager
{
public:
IWritableCraftDefManager(){}
virtual ~IWritableCraftDefManager(){}
// The main crafting function
virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
std::vector<ItemStack> &output_replacements,
bool decrementInput, IGameDef *gamedef) const=0;
virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output,
IGameDef *gamedef, unsigned limit=0) const=0;
virtual bool clearCraftRecipesByOutput(const CraftOutput &output, IGameDef *gamedef) = 0;
virtual bool clearCraftRecipesByInput(CraftMethod craft_method,
unsigned int craft_grid_width, const std::vector<std::string> &recipe, IGameDef *gamedef) = 0;
// Print crafting recipes for debugging
virtual std::string dump() const=0;
// Add a crafting definition.
// After calling this, the pointer belongs to the manager.
virtual void registerCraft(CraftDefinition *def, IGameDef *gamedef) = 0;
// Delete all crafting definitions
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virtual void clear()=0;
// To be called after all mods are loaded, so that we catch all aliases
virtual void initHashes(IGameDef *gamedef) = 0;
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};
IWritableCraftDefManager* createCraftDefManager();
#endif