Day 6: Combining Items in the UI

Today we updated the Grid Container UI to contain locations for resulting combined items to be displayed as well as add a button for combining. Additionally, we wired up the UI to the Crafting System implementation from the first 3 days of work. Lastly, we implemented a simple algorithm to scan assets to generate the RecipeData ScriptableObject.

• Watch On YouTube
• Source Code at the End of Day 6

Today’s Goals

1. Update Grid container UI to have Output Slots and Button (Combine)
2. Wire up UI Grid to use a Recipe Database and perform combine
3. Implement RecipeDatabaseBuilder which scans for Recipe assets

Update Grid container UI to have Output Slots and Button (Combine)

First order of business was to update the UI to have Output Slots and a Button that will eventually perform the combine:

Wire up UI Grid to use a Recipe Database

Next, we needed to wire up the logic to properly enforce swapping of items when moving them and enforcing the items stay in bounds. Additionally, when clicking combine, the resulting combine should appear in the output area.

Implement a RecipeDatabase Scanner

Lastly, we wanted to make it easy to add all recipes defined within a file structure to be added to the RecipeDatabase automagically. To do this, we wrote a validation script which scans the directory structure near the RecipeDatabase for RecipeData.

public void OnValidate()
{
    if (ScanForRecipes)
    {
        string[] pathEl = AssetDatabase.GetAssetPath(this).Split("/");
        string path = string.Join("/", pathEl.Take(pathEl.Length - 1));
        Recipes = AssetDatabase
            .FindAssets($"t:{nameof(GameRecipeData)}", new[]{path})
            .Select(AssetDatabase.GUIDToAssetPath)
            .Select(AssetDatabase.LoadAssetAtPath<GameRecipeData>).ToList();
        ScanForRecipes = false;
    }
}

The OnValidate is triggered when changes are made in the inspector. Using the a bool ScanForRecipes, there is a checkbox that can be clicked that scans the assets within the sub directory containing this database for GameRecipeData assets and updates the list:

We made tons of progress today! In fact, at this point, we completed all of our learning goals and scope requirements. All that is left is to clean up the UI.

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