new crafting system

code/foundation/CMakeLists.txt

@@ -13,6 +13,7 @@ add_library(eco2d-foundation STATIC
     src/models/items.c
     src/models/entity.c
     src/models/device.c
+    src/models/crafting.c
 
     src/models/prefabs/player.c
     src/models/prefabs/vehicle.c

code/foundation/src/lists/crafting_list.c

@@ -0,0 +1,26 @@
+#include "models/crafting.h"
+
+#define R(id1,qty1)\
+{\
+.id = id1,\
+.qty = qty1\
+}
+
+#define RECIPE(id,prod,qty,...)\
+{\
+.product = id,\
+.product_qty = qty,\
+.producer = prod,\
+.reagents = (reagent[]){\
+__VA_ARGS__\
+}\
+}
+
+static recipe recipes[] = {
+    RECIPE(ASSET_BELT, ASSET_FURNACE, 4, R(ASSET_FENCE, 8), R(ASSET_WOOD, 2), {0}),
+};
+
+#define MAX_RECIPES (sizeof(recipes)/sizeof(recipes[0]))
+
+#undef R
+#undef RECIPE

code/foundation/src/lists/items_list.c

@@ -4,7 +4,7 @@
 
 static item_desc items[] = {
     { .kind = 0, .max_quantity = 0, },
-    ITEM_INGREDIENT(ASSET_FENCE, 64, ASSET_FURNACE, ASSET_BELT, 0),
+    ITEM_HOLD(ASSET_FENCE, 64),
     ITEM_ENERGY(ASSET_COAL, ASSET_FURNACE, 64, 15.0f),
     ITEM_SELF(ASSET_WOOD, 64),
     ITEM_SELF(ASSET_TREE, 64),

code/foundation/src/models/components.c

@@ -17,7 +17,6 @@ ECS_COMPONENT_DECLARE(Inventory);
 ECS_COMPONENT_DECLARE(ItemContainer);
 ECS_COMPONENT_DECLARE(Producer);
 ECS_COMPONENT_DECLARE(EnergySource);
-ECS_COMPONENT_DECLARE(Ingredient);
 ECS_COMPONENT_DECLARE(ItemRouter);
 ECS_COMPONENT_DECLARE(Device);
 ECS_COMPONENT_DECLARE(Blueprint);
@@ -44,7 +43,6 @@ void ComponentsImport(ecs_world_t *ecs) {
     ECS_COMPONENT_DEFINE(ecs, ItemContainer);
     ECS_COMPONENT_DEFINE(ecs, Producer);
     ECS_COMPONENT_DEFINE(ecs, EnergySource);
-    ECS_COMPONENT_DEFINE(ecs, Ingredient);
     ECS_COMPONENT_DEFINE(ecs, ItemRouter);
     ECS_COMPONENT_DEFINE(ecs, Device);
     ECS_COMPONENT_DEFINE(ecs, Blueprint);

code/foundation/src/models/components.h

@@ -131,12 +131,13 @@ typedef struct {
 
 typedef struct {
     asset_id processed_item;
+    uint32_t processed_item_qty;
     float process_time;
     float energy_level;
 } Producer;
 
 typedef struct {
-    char _unused;
+    uint32_t push_qty;
 } ItemRouter;
 
 typedef struct {
@@ -144,12 +145,6 @@ typedef struct {
     float energy_level;
 } EnergySource;
 
-typedef struct {
-    asset_id producer;
-    asset_id additional_ingredient; // optional - can specify additional item we need in the container to craft this item
-    asset_id product;
-} Ingredient;
-
 typedef struct {
     uint16_t asset;
     
@@ -188,7 +183,6 @@ extern ECS_COMPONENT_DECLARE(Inventory);
 extern ECS_COMPONENT_DECLARE(ItemContainer);
 extern ECS_COMPONENT_DECLARE(Producer);
 extern ECS_COMPONENT_DECLARE(EnergySource);
-extern ECS_COMPONENT_DECLARE(Ingredient);
 extern ECS_COMPONENT_DECLARE(ItemRouter);
 extern ECS_COMPONENT_DECLARE(Device);
 extern ECS_COMPONENT_DECLARE(Blueprint);

code/foundation/src/models/crafting.c

@@ -0,0 +1,147 @@
+#include "crafting.h"
+#include "models/items.h"
+
+typedef struct {
+    asset_id id;
+    uint32_t qty;
+} reagent;
+
+typedef struct {
+    asset_id product;
+    uint32_t product_qty;
+    asset_id producer;
+    reagent *reagents;
+} recipe;
+
+#include "lists/crafting_list.c"
+
+uint32_t craft__find_num_recipes_by_reagent(asset_id producer, asset_id id) {
+    uint32_t num_recipes=0;
+    for (int i = 0; i < MAX_RECIPES; ++i) {
+        if (recipes[i].producer == producer) {
+            for (int j = 0; recipes[i].reagents[j].id; ++j) {
+                if (recipes[i].reagents[j].id == id) {
+                    ++num_recipes;
+                }
+            }
+        }
+    }
+    return num_recipes;
+}
+
+recipe *craft__find_recipe_by_reagent(asset_id producer, asset_id id, uint32_t slot_id) {
+    for (int i = 0; i < MAX_RECIPES; ++i) {
+        if (recipes[i].producer == producer) {
+            for (int j = 0; recipes[i].reagents[j].id; ++j) {
+                if (recipes[i].reagents[j].id == id) {
+                    if (slot_id > 0) {
+                        --slot_id;
+                        continue;
+                    }
+                    return &recipes[i];
+                }
+            }
+        }
+    }
+    return NULL;
+}
+
+bool craft_is_reagent_used_in_producer(asset_id reagent, asset_id producer) {
+    return craft__find_num_recipes_by_reagent(producer, reagent) > 0;
+}
+
+asset_id craft_perform_recipe(ecs_entity_t *items, asset_id producer, uint32_t *quantity) {
+    ZPL_ASSERT_NOT_NULL(items);
+    
+    for (int i = 0; i < ITEMS_CONTAINER_SIZE; i++) {
+        ecs_entity_t item_slot_ent = items[i];
+        if (item_slot_ent == 0) continue;
+        Item *item = item_get_data(item_slot_ent);
+        if (!item) continue;
+        
+        uint32_t num_recipes = craft__find_num_recipes_by_reagent(producer, item->kind);
+        for (uint32_t rec_i = 0; rec_i < num_recipes; ++rec_i) {
+            // TODO(zaklaus): slow, find a better way to retrieve known recipes
+            recipe *rec = craft__find_recipe_by_reagent(producer, item->kind, rec_i);
+            if (!rec) {
+                // NOTE(zaklaus): this item is not used as a reagent, skip it.
+                // TODO(zaklaus): is this a bug? should we assert?
+                continue;
+            }
+            
+            uint8_t skip_slot=0;
+            
+            // NOTE(zaklaus): analyse if all the reagents are present
+            for (int j = 0; rec->reagents[j].id; ++j) {
+                reagent *rea = &rec->reagents[j];
+                uint32_t pending_qty = rea->qty;
+                
+                for (int k = 0; k < ITEMS_CONTAINER_SIZE; k++) {
+                    ecs_entity_t rea_item_slot_ent = items[k];
+                    if (rea_item_slot_ent == 0) continue;
+                    Item *rea_item = item_get_data(rea_item_slot_ent);
+                    if (!rea_item) continue;
+                    
+                    if (rea->id == rea_item->kind && rea_item->quantity > 0) {
+                        pending_qty -= zpl_min(pending_qty, rea_item->quantity);
+                        
+                        if (pending_qty == 0) {
+                            break;
+                        }
+                    }
+                }
+                
+                if (pending_qty > 0) {
+                    // NOTE(zaklaus): reagent not found, bail
+                    skip_slot=1;
+                    break;
+                }
+            }
+            
+            // NOTE(zaklaus): demand not met, bye!
+            if (skip_slot)
+                continue;
+            
+            // NOTE(zaklaus): deplete used reagents
+            for (int j = 0; rec->reagents[j].id; ++j) {
+                reagent *rea = &rec->reagents[j];
+                uint32_t pending_qty = rea->qty;
+                
+                for (int k = 0; k < ITEMS_CONTAINER_SIZE; k++) {
+                    ecs_entity_t rea_item_slot_ent = items[k];
+                    if (rea_item_slot_ent == 0) continue;
+                    Item *rea_item = item_get_data(rea_item_slot_ent);
+                    if (!rea_item) continue;
+                    
+                    if (rea->id == rea_item->kind && rea_item->quantity > 0) {
+                        rea_item->quantity -= zpl_min(pending_qty, rea_item->quantity);
+                        pending_qty -= zpl_min(pending_qty, rea_item->quantity);
+                        if (rea_item->quantity == 0) {
+                            item_despawn(rea_item_slot_ent);
+                            items[k] = 0;
+                        }
+                        
+                        if (pending_qty == 0) {
+                            break;
+                        }
+                    }
+                }
+            }
+            
+            // NOTE(zaklaus): all done, return the product and its qty
+            *quantity = rec->product_qty;
+            return rec->product;
+        }
+    }
+    return 0;
+}
+
+// TODO(zaklaus): 
+asset_id craft_has_byproducts(asset_id product) {
+    return 0xFF;
+}
+
+// TODO(zaklaus): 
+uint32_t craft_resolve_graph(asset_id product, uint16_t *hops, uint8_t direct_cost) {
+    return 0;
+}

code/foundation/src/models/crafting.h

@@ -0,0 +1,21 @@
+#pragma once
+#include "platform/system.h"
+#include "models/assets.h"
+
+#include "models/components.h"
+
+// NOTE(zaklaus): resolves recipe dependencies and consumes reagents
+// to enqueue a production of a new item.
+// TODO(zaklaus): "items" is assumed to come from ItemContainer component.
+asset_id craft_perform_recipe(ecs_entity_t *items, asset_id producer, uint32_t *quantity);
+
+// NOTE(zaklaus): informs us on whether this product has any byproducts desired.
+asset_id craft_has_byproducts(asset_id product);
+
+// NOTE(zaklaus): mostly used by item router so we don't push reagents out
+bool craft_is_reagent_used_in_producer(asset_id reagent, asset_id producer);
+
+// NOTE(zaklaus): resolves the production chain and analyses the amount of items required
+// and a number of hops (production layers) needed to produce the item.
+// optionally, it allows to calculate "direct_cost" of the product.
+uint32_t craft_resolve_graph(asset_id product, uint16_t *hops, uint8_t direct_cost);

code/foundation/src/models/items.c

@@ -57,12 +57,6 @@ uint64_t item_spawn(asset_id kind, uint32_t qty) {
                 .energy_level = it->energy_source.energy_level,
             };
         } break;
-    case UDATA_INGREDIENT: {
-        Ingredient *i = ecs_get_mut(world_ecs(), e, Ingredient);
-        i->producer = it->ingredient.producer;
-        i->product = it->ingredient.product;
-        i->additional_ingredient = it->ingredient.additional_ingredient;
-    } break;
         default: break;
     }
     

code/foundation/src/models/items.h

@@ -21,7 +21,6 @@ typedef enum {
 typedef enum {
     UDATA_NONE,
     UDATA_ENERGY_SOURCE,
-    UDATA_INGREDIENT,
 } item_attachment;
 
 typedef struct {
@@ -52,12 +51,6 @@ typedef struct {
             asset_id producer;
             float energy_level;
         } energy_source;
-
-        struct {
-            asset_id producer;
-            asset_id product;
-            asset_id additional_ingredient;
-        } ingredient;
     };
     
     // NOTE: item data

code/foundation/src/models/prefabs/furnace.c

@@ -15,7 +15,7 @@ uint64_t furnace_spawn(void) {
     *producer = (Producer){0};
     producer->energy_level = 69.0f;
     
-    ecs_add(world_ecs(), e, ItemRouter);
+    ecs_set(world_ecs(), e, ItemRouter, {1});
     return (uint64_t)e;
 }
 

code/foundation/src/systems/modules/system_logistics.c

@@ -1,3 +1,5 @@
+#include "models/crafting.h"
+
 static inline
 asset_id FetchAssetAtPos(float x, float y) {
     world_block_lookup lookup = world_block_from_realpos(x, y);
@@ -63,6 +65,7 @@ void PushItemsOnNodes(ecs_iter_t *it) {
         // We need a way to refer to specific blocks in the world so we can do easy block ID checks
         // and re-build the cache when a change is detected.
         
+        
         float push_dx[4], push_dy[4];
         uint8_t nodes = CheckForNearbyBelts(&p[i], push_dx, push_dy);
         uint8_t num_nodes = (uint8_t)zpl_count_set_bits(nodes);
@@ -77,14 +80,12 @@ void PushItemsOnNodes(ecs_iter_t *it) {
             ecs_entity_t item_slot_ent = storage[i].items[j];
             if (item_slot_ent == 0) continue;
             Item *item = item_get_data(item_slot_ent);
+            if (!item) continue;
             
-            const Ingredient *ing = 0;
-            // NOTE(zaklaus): Make sure we don't push out items from input node
-            if ((ing = ecs_get_if(it->world, item_slot_ent, Ingredient))) {
-                if (ing->producer == d->asset) {
+            if (craft_is_reagent_used_in_producer(item->kind, d->asset)) {
+                // NOTE(zaklaus): this is an input reagent, keep it
                 continue;
             }
-            }
             
             while (item->quantity > 0 && num_nodes > 0) {
                 // NOTE(zaklaus): Use a rolling counter to select an output node.
@@ -94,14 +95,14 @@ void PushItemsOnNodes(ecs_iter_t *it) {
                     continue;
                 }
                 
-                uint64_t e = item_spawn(item->kind, 1);
+                uint64_t e = item_spawn(item->kind, zpl_min(r->push_qty, item->quantity));
                 entity_set_position(e, p[i].x + push_dx[counter], p[i].y + push_dy[counter]);
                 
                 Velocity *e_vel = ecs_get_mut_ex(it->world, e, Velocity);
                 e_vel->x = push_dx[counter];
                 e_vel->y = push_dy[counter];
                 
-                --item->quantity;
+                item->quantity -= zpl_min(r->push_qty, item->quantity);
                 --num_nodes;
                 ++counter;
             }

code/foundation/src/systems/modules/system_producer.c

@@ -1,3 +1,5 @@
+#include "models/crafting.h"
+
 void ProduceItems(ecs_iter_t *it) {
     ItemContainer *storage = ecs_field(it, ItemContainer, 1);
     Producer *producer = ecs_field(it, Producer, 2);
@@ -7,6 +9,7 @@ void ProduceItems(ecs_iter_t *it) {
     for (int i = 0; i < it->count; i++) {
         for (int j = 0; j < ITEMS_CONTAINER_SIZE; j++) {
             ecs_entity_t item_slot_ent = storage[i].items[j];
+            if (item_slot_ent == 0) continue;
             Item *item = item_get_data(item_slot_ent);
             
             const EnergySource *energy_source = 0;
@@ -19,27 +22,19 @@ void ProduceItems(ecs_iter_t *it) {
                 continue;
             }
             
+            // TODO(zaklaus): handle fuel
             // if (producer[i].energy_level <= 0.0f) continue;
+            
+            // TODO(zaklaus): use ticks
             if (producer[i].process_time < game_time()) {
                 if (producer[i].processed_item > 0) {
-                    uint64_t e = item_spawn(producer[i].processed_item, 1);
+                    uint64_t e = item_spawn(producer[i].processed_item, producer[i].processed_item_qty);
                     entity_set_position(e, p[i].x, p[i].y);
                     producer[i].processed_item = 0;
                 } else {
-                    const Ingredient *ing = 0;
-                    if ((ing = ecs_get_if(it->world, item_slot_ent, Ingredient))) {
-                        if (ing->producer == d->asset) {
-                            if (item->quantity <= 0) {
-                                item_despawn(item_slot_ent);
-                                storage[i].items[j] = 0;
-                            } else {
-                                producer[i].processed_item = ing->product;
+                    producer[i].processed_item = craft_perform_recipe(storage[i].items, d->asset, &producer[i].processed_item_qty);
                     producer[i].process_time = game_time() + game_rules.furnace_cook_time;
                 }
-                            item->quantity--;
-                        }
-                    }
-                }
             }
         }