feat: item models generation simple & remove core:item_models

src/graphics/render/ModelsGenerator.cpp

@@ -0,0 +1,71 @@
+#include "ModelsGenerator.hpp"
+
+#include "assets/Assets.hpp"
+#include "items/ItemDef.hpp"
+#include "voxels/Block.hpp"
+#include "content/Content.hpp"
+#include "debug/Logger.hpp"
+
+static debug::Logger logger("models-generator");
+
+static void configure_textures(
+    model::Model& model,
+    const Block& blockDef,
+    const Assets& assets
+) {
+    for (auto& mesh : model.meshes) {
+        auto& texture = mesh.texture;
+        if (texture.empty() || texture.at(0) != '$') {
+            continue;
+        }
+        try {
+            int index = std::stoi(texture.substr(1));
+            texture = "blocks:"+blockDef.textureFaces.at(index);
+        } catch (const std::invalid_argument& err) {
+        } catch (const std::runtime_error& err) {
+            logger.error() << err.what();
+        }
+    }
+}
+
+static model::Model create_flat_model(
+    const std::string& texture, const Assets& assets
+) {
+    auto model = assets.require<model::Model>("drop-item");
+    for (auto& mesh : model.meshes) {
+        if (mesh.texture == "$0") {
+            mesh.texture = texture;
+        }
+    }
+    return model;
+}
+
+model::Model ModelsGenerator::generate(
+    const ItemDef& def, const Content& content, const Assets& assets
+) {
+    if (def.iconType == ItemIconType::BLOCK) {
+        auto model = assets.require<model::Model>("block");
+        const auto& blockDef = content.blocks.require(def.icon);
+        if (blockDef.model == BlockModel::xsprite) {
+            return create_flat_model(
+                "blocks:" + blockDef.textureFaces.at(0), assets
+            );
+        }
+        for (auto& mesh : model.meshes) {
+            switch (blockDef.model) {
+                case BlockModel::aabb:
+                    mesh.scale(blockDef.hitboxes.at(0).size());
+                    break;
+                default:
+                    break;
+            }
+            mesh.scale(glm::vec3(0.3f));
+        }
+        configure_textures(model, blockDef, assets);
+        return model;
+    } else if (def.iconType == ItemIconType::SPRITE) {
+        return create_flat_model(def.icon, assets);
+    } else {
+        return model::Model();
+    }
+}