Fix toolbelt copper credit bug (GregTechCEu#2892)

Author: M-W-K

src/main/java/gregtech/api/items/toolitem/ItemGTToolbelt.java

@@ -264,6 +264,14 @@ public boolean shouldCauseReequipAnimation(@NotNull ItemStack oldStack, @NotNull
         return false;
     }
 
+    @Override
+    public int getMetadata(ItemStack stack) {
+        ItemStack selected = getHandler(stack).getSelectedStack();
+        if (!selected.isEmpty()) {
+            return selected.getItem().getMetadata(selected);
+        } else return super.getMetadata(stack);
+    }
+
     @Override
     public boolean isDamaged(@NotNull ItemStack stack) {
         ItemStack selected = getHandler(stack).getSelectedStack();

src/main/java/gregtech/common/items/ToolItems.java

@@ -9,6 +9,7 @@
 import gregtech.core.sound.GTSoundEvents;
 
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.block.model.ModelBakery;
 import net.minecraft.client.renderer.block.model.ModelResourceLocation;
 import net.minecraft.enchantment.EnumEnchantmentType;
 import net.minecraft.entity.monster.EntityGolem;
@@ -374,7 +375,14 @@ public static IGTTool register(@NotNull IGTTool tool) {
     }
 
     public static void registerModels() {
-        TOOLS.forEach(tool -> ModelLoader.setCustomModelResourceLocation(tool.get(), 0, tool.getModelLocation()));
+        for (IGTTool tool : TOOLS) {
+            if (tool == TOOLBELT) {
+                ModelLoader.setCustomMeshDefinition(tool.get(), s -> tool.getModelLocation());
+                ModelBakery.registerItemVariants(tool.get(), tool.getModelLocation());
+            } else {
+                ModelLoader.setCustomModelResourceLocation(tool.get(), 0, tool.getModelLocation());
+            }
+        }
     }
 
     @SideOnly(Side.CLIENT)