feat(port): start work on porting relic generation

data/json/artifact/relic_procgen_data.json

@@ -0,0 +1,125 @@
+[
+  {
+    "type": "relic_procgen_data",
+    "id": "cult",
+    "passive_add_procgen_values": [
+      { "weight": 100, "min_value": -1, "max_value": 1, "type": "STRENGTH", "increment": 1, "power_per_increment": 250 },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "DEXTERITY",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "PERCEPTION",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "INTELLIGENCE",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -100,
+        "max_value": 25,
+        "type": "SPEED",
+        "increment": 5,
+        "power_per_increment": 200
+      }
+    ],
+    "type_weights": [ { "weight": 100, "value": "passive_enchantment_add" } ],
+    "items": [ { "weight": 100, "item": "spoon" } ]
+  },
+  {
+    "type": "relic_procgen_data",
+    "id": "netherum_tunnels",
+    "passive_add_procgen_values": [
+      { "weight": 100, "min_value": -1, "max_value": 1, "type": "STRENGTH", "increment": 1, "power_per_increment": 250 },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "DEXTERITY",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "PERCEPTION",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "INTELLIGENCE",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -100,
+        "max_value": 25,
+        "type": "SPEED",
+        "increment": 5,
+        "power_per_increment": 200
+      }
+    ],
+    "type_weights": [ { "weight": 100, "value": "passive_enchantment_add" } ],
+    "items": [ { "weight": 100, "item": "spoon" } ]
+  },
+  {
+    "type": "relic_procgen_data",
+    "id": "alien_reality",
+    "passive_add_procgen_values": [
+      { "weight": 100, "min_value": -1, "max_value": 1, "type": "STRENGTH", "increment": 1, "power_per_increment": 250 },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "DEXTERITY",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "PERCEPTION",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -1,
+        "max_value": 1,
+        "type": "INTELLIGENCE",
+        "increment": 1,
+        "power_per_increment": 250
+      },
+      {
+        "weight": 100,
+        "min_value": -100,
+        "max_value": 25,
+        "type": "SPEED",
+        "increment": 5,
+        "power_per_increment": 200
+      }
+    ],
+    "type_weights": [ { "weight": 100, "value": "passive_enchantment_add" } ],
+    "items": [ { "weight": 100, "item": "spoon" } ]
+  }
+]

doc/src/content/docs/en/mod/json/reference/items/relics.md

@@ -64,3 +64,79 @@ optional):
 | `rad`           | Character or map tile must be irradiated                                  |
 | `wet`           | Character must be wet, or it's raining                                    |
 | `sky`           | Character must be above z=0                                               |
+
+# Generation
+
+The procedural generation of artifacts is defined in Json. The object looks like the following:
+
+```json
+{
+  "type": "relic_procgen_data",
+  "id": "cult",
+  "passive_add_procgen_values": [
+    {
+      "weight": 100,
+      "min_value": -1,
+      "max_value": 1,
+      "type": "STRENGTH",
+      "increment": 1,
+      "power_per_increment": 250
+    }
+  ],
+  "passive_mult_procgen_values": [
+    {
+      "weight": 100,
+      "min_value": -1.5,
+      "max_value": 1.5,
+      "type": "STRENGTH",
+      "increment": 0.1,
+      "power_per_increment": 250
+    }
+  ],
+  "type_weights": [{ "weight": 100, "value": "passive_enchantment_add" }],
+  "items": [{ "weight": 100, "item": "spoon" }]
+}
+```
+
+## passive_add_procgen_values and passive_mult_procgen_values
+
+As the names suggest, these are _passive_ benefits/penalties to having the artifact (ie. always
+present without activating the artifact's abilities). **Add** values add or subtract from existing
+scores, and **mult** values multiply them. These are entered as a list of possible 'abilities' the
+artifact could get. It does not by default get all these abilities, rather when it spawns it selects
+from the list provided.
+
+- **weight:** the weight of this value in the list, to be chosen randomly
+- **min_value:** the minimum possible value for this value type. for add must be an integer, for
+  mult it can be a float
+- **max_value:** the maximum possible value for this value type. for add must be an integer, for
+  mult it can be a float
+- **type:** the type of enchantment value. see MAGIC.md for detailed documentation on enchantment
+  values
+- **increment:** the increment that is used for the power multiplier
+- **power_per_increment:** the power value per increment
+
+## type_weights
+
+This determines the relative weight of the 'add' and 'mult' types. When generated, an artifact first
+decides if it is going to apply an 'add' or a 'mult' ability based on the type_weights of each. Then
+it uses the weights of the entries under the selected type to pick an ability. This continues
+cycling until the artifact reaches the defined power level. Possible values right now that are
+functional are:
+
+- passive_enchantment_add
+- passive_enchantment_mult
+
+This must be included in a dataset or it could cause a crash.
+
+## items
+
+This provides a list of possible items that this artifact can spawn as, if it appears randomly in a
+hard-coded map extra.
+
+## Power Level
+
+An artifact's power level is a summation of its attributes. For example, each point of strength
+addition in the above object, the artifact is a +250 power, so an artifact with +2 strength would
+have a power level of 500. similarly, if an artifact had a strength multiplier of 0.8, it would have
+a power level of -500.

src/debug_menu.cpp

@@ -1637,7 +1637,7 @@ void debug()
                 artifact_natural_property prop = static_cast<artifact_natural_property>( rng( ARTPROP_NULL + 1,
                                                  ARTPROP_MAX - 1 ) );
                 m.create_anomaly( *center, prop );
-                m.spawn_natural_artifact( *center, prop );
+                m.spawn_artifact( *center, relic_procgen_id( "alien_reality" ) );
             }
             break;
 

src/init.cpp

@@ -254,6 +254,7 @@ void DynamicDataLoader::initialize()
     add( "json_flag", &json_flag::load_all );
     add( "mutation_flag", &json_trait_flag::load_all );
     add( "fault", &fault::load_fault );
+    add( "relic_procgen_data", &relic_procgen_data::load_relic_procgen_data );
     add( "field_type", &field_types::load );
     add( "weather_type", &weather_types::load );
     add( "ammo_effect", &ammo_effects::load );

src/item.cpp

@@ -9217,6 +9217,11 @@ std::vector<trait_id> item::mutations_from_wearing( const Character &guy ) const
     return muts;
 }
 
+void item::overwrite_relic( const relic &nrelic )
+{
+    this->relic_data = cata::make_value<relic>( nrelic );
+}
+
 void item::process_relic( Character &carrier )
 {
     if( !is_relic() ) {

src/item.h

@@ -1214,6 +1214,7 @@ class item : public location_visitable<item>, public game_object<item>
          * @param pos The location of the artifact (should be the player location if carried).
          */
         void process_artifact( player *carrier, const tripoint &pos );
+        void overwrite_relic( const relic &nrelic );
         void process_relic( Character &carrier );
 
         bool destroyed_at_zero_charges() const;

src/magic_enchantment.cpp

@@ -20,23 +20,6 @@
 #include "string_id.h"
 #include "units.h"
 
-template <typename E> struct enum_traits;
-
-template<>
-struct enum_traits<enchantment::has> {
-    static constexpr enchantment::has last = enchantment::has::NUM_HAS;
-};
-
-template<>
-struct enum_traits<enchantment::condition> {
-    static constexpr enchantment::condition last = enchantment::condition::NUM_CONDITION;
-};
-
-template<>
-struct enum_traits<enchant_vals::mod> {
-    static constexpr enchant_vals::mod last = enchant_vals::mod::NUM_MOD;
-};
-
 namespace io
 {
     // *INDENT-OFF*
@@ -401,6 +384,31 @@ void enchantment::force_add( const enchantment &rhs )
     }
 }
 
+void enchantment::set_has( enchantment::has value )
+{
+    active_conditions.first = value;
+}
+
+void enchantment::add_value_add( enchant_vals::mod value, int add_value )
+{
+    values_add[value] = add_value;
+}
+
+void enchantment::add_value_mult( enchant_vals::mod value, float mult_value )
+{
+    values_multiply[value] = mult_value;
+}
+
+void enchantment::add_hit_me( const fake_spell &sp )
+{
+    hit_me_effect.push_back( sp );
+}
+
+void enchantment::add_hit_you( const fake_spell &sp )
+{
+    hit_you_effect.push_back( sp );
+}
+
 int enchantment::get_value_add( const enchant_vals::mod value ) const
 {
     const auto found = values_add.find( value );

src/magic_enchantment.h

@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "calendar.h"
+#include "enum_traits.h"
 #include "magic.h"
 #include "type_id.h"
 
@@ -99,6 +100,14 @@ class enchantment
         // adds two enchantments together and ignores their conditions
         void force_add( const enchantment &rhs );
 
+        void set_has( has value );
+
+        void add_value_add( enchant_vals::mod value, int add_value );
+        void add_value_mult( enchant_vals::mod value, float mult_value );
+
+        void add_hit_me( const fake_spell &sp );
+        void add_hit_you( const fake_spell &sp );
+
         int get_value_add( enchant_vals::mod value ) const;
         double get_value_multiply( enchant_vals::mod value ) const;
 
@@ -172,4 +181,21 @@ class enchantment
                                      const fake_spell &sp ) const;
 };
 
+template <typename E> struct enum_traits;
+
+template<>
+struct enum_traits<enchantment::has> {
+    static constexpr enchantment::has last = enchantment::has::NUM_HAS;
+};
+
+template<>
+struct enum_traits<enchantment::condition> {
+    static constexpr enchantment::condition last = enchantment::condition::NUM_CONDITION;
+};
+
+template<>
+struct enum_traits<enchant_vals::mod> {
+    static constexpr enchant_vals::mod last = enchant_vals::mod::NUM_MOD;
+};
+
 #endif // CATA_SRC_MAGIC_ENCHANTMENT_H

src/map.cpp

@@ -4349,15 +4349,14 @@ std::vector<detached_ptr<item>> map::spawn_items( const tripoint &p,
     return ret;
 }
 
-void map::spawn_artifact( const tripoint &p )
+void map::spawn_artifact( const tripoint &p, const relic_procgen_id &id )
 {
-    add_item_or_charges( p, item::spawn( new_artifact(), calendar::start_of_cataclysm ) );
-}
+    relic_procgen_data::generation_rules rules;
+    rules.max_attributes = 5;
+    rules.power_level = 1000;
+    rules.max_negative_power = -2000;
 
-void map::spawn_natural_artifact( const tripoint &p, artifact_natural_property prop )
-{
-    add_item_or_charges( p, item::spawn( new_natural_artifact( prop ),
-                                         calendar::start_of_cataclysm ) );
+    add_item_or_charges( p, id->create_item( rules ) );
 }
 
 void map::spawn_item( const tripoint &p, const itype_id &type_id,

src/map.h

@@ -56,6 +56,7 @@ class mapgendata;
 class monster;
 class optional_vpart_position;
 class player;
+class relic_procgen_data;
 class submap;
 template<typename Tripoint>
 class tripoint_range;
@@ -99,6 +100,8 @@ namespace cata
 template <class T> class poly_serialized;
 } // namespace cata
 
+using relic_procgen_id = string_id<relic_procgen_data>;
+
 class map_stack : public item_stack
 {
     private:
@@ -1200,8 +1203,7 @@ class map
         detached_ptr<item> i_rem( point p, item *it ) {
             return i_rem( tripoint( p, abs_sub.z ), it );
         }
-        void spawn_artifact( const tripoint &p );
-        void spawn_natural_artifact( const tripoint &p, artifact_natural_property prop );
+        void spawn_artifact( const tripoint &p, const relic_procgen_id &id );
         void spawn_item( const tripoint &p, const itype_id &type_id,
                          unsigned quantity = 1, int charges = 0,
                          const time_point &birthday = calendar::start_of_cataclysm, int damlevel = 0 );