add drop.json

res/content/base/content.json

@@ -1,6 +1,6 @@
 {
-  "items": [
-    "bazalt_breaker"
+  "entities": [
+    "drop"
   ],
   "blocks": [
     "dirt",
@@ -27,5 +27,8 @@
     "lightbulb",
     "torch",
     "wooden_door"
+  ],
+  "items": [
+    "bazalt_breaker"
   ]
 }

res/content/base/entities/drop.json

@@ -0,0 +1,3 @@
+{
+    "hitbox": [0.2, 0.2, 0.2]
+}

res/content/base/scripts/hud.lua

@@ -5,7 +5,7 @@ function on_hud_open()
     input.add_callback("player.drop", function ()
         local pid = hud.get_player()
         local pvel = {player.get_vel(pid)}
-        local eid = entity.test()
+        local eid = entity.spawn("base:drop")
         local throw_force = vec3.mul(player.get_dir(pid), DROP_FORCE)
         entity.set_vel(eid, vec3.add(throw_force, vec3.add(pvel, DROP_INIT_VEL)))
     end)

src/content/ContentLoader.cpp

@@ -301,8 +301,7 @@ void ContentLoader::loadItem(ItemDef& def, const std::string& name, const fs::pa
     root->num("stack-size", def.stackSize);
 
     // item light emission [r, g, b] where r,g,b in range [0..15]
-    auto emissionarr = root->list("emission");
-    if (emissionarr) {
+    if (auto emissionarr = root->list("emission")) {
         def.emission[0] = emissionarr->num(0);
         def.emission[1] = emissionarr->num(1);
         def.emission[2] = emissionarr->num(2);
@@ -311,7 +310,11 @@ void ContentLoader::loadItem(ItemDef& def, const std::string& name, const fs::pa
 
 void ContentLoader::loadEntity(EntityDef& def, const std::string& name, const fs::path& file) {
     auto root = files::read_json(file);
-    
+    root->str("script-name", def.scriptName);
+    if (auto boxarr = root->list("hitbox")) {
+        def.hitbox = glm::vec3(boxarr->num(0), boxarr->num(1), boxarr->num(2));
+    }
+    std::cout << "loading entity " << name << " from " << file.u8string() << std::endl;
 }
 
 void ContentLoader::loadEntity(EntityDef& def, const std::string& full, const std::string& name) {

src/logic/scripting/lua/libentity.cpp

@@ -7,6 +7,7 @@
 #include "../../../physics/Hitbox.hpp"
 #include "../../../window/Camera.hpp"
 #include "../../../frontend/hud.hpp"
+#include "../../../content/Content.hpp"
 
 #include <optional>
 
@@ -21,10 +22,12 @@ static std::optional<Entity> get_entity(lua::State* L, int idx) {
     return level->entities->get(id);
 }
 
-static int l_test(lua::State* L) {
+static int l_spawn(lua::State* L) {
     auto level = controller->getLevel();
     auto player = hud->getPlayer();
-    auto id = level->entities->drop(player->camera->position);
+    auto defname = lua::tostring(L, 1);
+    auto& def = content->entities.require(defname);
+    auto id = level->entities->spawn(def, player->camera->position);
     return lua::pushinteger(L, id);
 }
 
@@ -43,7 +46,7 @@ static int l_set_vel(lua::State* L) {
 }
 
 const luaL_Reg entitylib [] = {
-    {"test", lua::wrap<l_test>},
+    {"spawn", lua::wrap<l_spawn>},
     {"get_vel", lua::wrap<l_get_vel>},
     {"set_vel", lua::wrap<l_set_vel>},
     {NULL, NULL}

src/objects/Entities.cpp

@@ -8,6 +8,7 @@
 #include "../graphics/core/LineBatch.hpp"
 #include "../graphics/core/Model.hpp"
 #include "../maths/FrustumCulling.hpp"
+#include "../objects/EntityDef.hpp"
 
 #include <glm/ext/matrix_transform.hpp>
 
@@ -21,14 +22,13 @@ void Transform::refresh() {
 Entities::Entities(Level* level) : level(level) {
 }
 
-entityid_t Entities::drop(glm::vec3 pos) {
+entityid_t Entities::spawn(EntityDef& def, glm::vec3 pos) {
     auto entity = registry.create();
     glm::vec3 size(1);
     auto id = nextID++;
     registry.emplace<EntityId>(entity, static_cast<entityid_t>(id));
     registry.emplace<Transform>(entity, pos, size/4.0f, glm::mat3(1.0f));
-    registry.emplace<Hitbox>(entity, pos, 
-        glm::vec3(size.x*0.2f, size.y*0.5f, size.z*0.2f));
+    registry.emplace<Hitbox>(entity, pos, def.hitbox);
     entities[id] = entity;
     return id;
 }

src/objects/Entities.hpp

@@ -28,6 +28,7 @@ class LineBatch;
 class ModelBatch;
 class Frustum;
 class Rig;
+struct EntityDef;
 
 class Entity {
     entt::registry& registry;
@@ -65,7 +66,7 @@ public:
     void renderDebug(LineBatch& batch);
     void render(Assets* assets, ModelBatch& batch, Frustum& frustum);
 
-    entityid_t drop(glm::vec3 pos);
+    entityid_t spawn(EntityDef& def, glm::vec3 pos);
 
     std::optional<Entity> get(entityid_t id) {
         const auto& found = entities.find(id);

src/objects/EntityDef.hpp

@@ -2,6 +2,7 @@
 #define OBJECTS_ENTITY_DEF_HPP_
 
 #include <string>
+#include <glm/glm.hpp>
 
 #include "../typedefs.hpp"
 
@@ -10,6 +11,7 @@ struct EntityDef {
     std::string const name;
 
     std::string scriptName = name.substr(name.find(':')+1);
+    glm::vec3 hitbox {0.5f};
     
     struct {
         entityid_t id;