Reynard Devlog #18 – Tutorial, Death Cam, Chewie Companion, Skins and More (0.8.9)
Finally… A tutorial has been added. The game will now explains its basics in an “interactive” way.
Tutorial
When getting feedback from players, I’ve noticed that very few of them figured out all of the game’s mechanics.
Many players didn’t know that there is crafting in the game, that you can charge your attack or that your attacks don’t deal knockback once you run out of stamina.
That’s why I’ve finally created an interactive tutorial, which also adds some value to the story. Here’s its outcome (check Hammlet’s bruises in the featured photo).
Tutorial will start once you create a new profile.
Death Cam
I thought that it would be cool if you could see last 3 seconds of your life before you failed miserably. I’ve added an optional setting which enables GIF recorder… So you can have some laughs of your failed Prascilla rescue attempts.
On windows you’ll be able to find GIFs under: C:\Users\your_user\AppData\LocalLow\Hyper Fox Studios\Reynard
Feedback for allies is positive and with this update we’re bringing in “Chewy”. He’s a demon-like creature which is immune to fire, deals fiery damage and when he’s not attacking he also breaks crates, pots and other breakable stuff. Which means that you won’t have to spend so much time and stamina on breaking stuff.
Here’s a gif from my testing session 😀
Skins
Since it’s Christmas season, I’m adding the skin which is Santa’s costume.
All Changes
[FEATURE] Tutorial section added. Every profile starts with a tutorial scene, which is skipable. Tutorial explains some of the lore so check it out 🙂
[FEATURE] You can now enable death camera. It will record 3 seconds before you died in a gif format.
[FEATURE] You can now change Reynard’s clothes… Santa’s costume added.
[ALLY] Chewy joined the ranks of allies!
[RECIPE] Golem’s Plate – Golem’s hand + Poor normal Armor Rune.
[INGREDIENT] Golem’s Hand – Dropped by golems.
[MINOR] Added SFX to forge, chest, bat, rat, item pickup, item drop.
[MINOR] Removed the “+” sign from weapon damage.
[MINOR] Added a darker “belt” of water around islands.
[MINOR] Edited the chapter of supporters.
[MINOR] XP slider not annoying anymore. It’s faster. Thank you VooGzy!
[BALANCING] Molten Helmet’s fire resist reduced from 100% to 75%.
[BALANCING] Buffed Ferdinand’s base attack damage from 1 to 1.5.
[BALANCING] Necro bow now shoots only 1 arrow has increase knockback, damage and crit chance.
[BALANCING] Bubba’s potion prices have been increased.
[BUGFIX] Removed Boom Joe from Foen and his immunity to ice.
[BUGFIX] Fixed bugged acid rune.
[BUGFIX] Golden bomb now isn’t blown away from windy room.
[BUGFIX] Sometimes you could take items from shrine without paying.
[BUGFIX] Ferdinand’s SFX sound wouldn’t stop repeating in some case… even if you kill him.
[SPOILER ALERT!] Prascilla now appears back on the Island once you finish the game.
In the upcoming week I’ll focus on boss battles, new items and leaderboards… and bug fixes! If you’d like to recommend anything, please let me know!
Many games like Diablo, World of Warcraft and Final Fantasy use loot drop tables for… well… amm… loot drops and stuff 😀
Currently in Pariah I’m facing random generation. Even though it’s gonna be “randomly” generated world, I still want to have some kind of control over the quantity of spawned items, randomly picked backgrounds, vegetation, resources etc.
I’m not saying that the way I’m doing it, is the best way to implement control over randomness, but I found out that using loot drop table (LDT) can really help me out in multiple situations.
Example of usage
For example we can use loot drop tables in biomes when we want to generate ground. Ground can be made out of different tiles, but we still want to pick the tile with the most grass in it and use it more frequently than other tiles… and that’s where we can harness the power of loot drop tables.
We can create a treasure chest script, that has chances of dropping rare, frequent or maybe legendary loot.
We can use loot drop tables for all sorts of stuff. Before diving into the code and further explanation, I’d really recommend reading this awesome article about loot drop tables on Gamasutra.
The case, tutorial and our goal
I know that i’m gonna use loot drop tables multiple times for different scenarios and that’s the reason why I decided to write two simple generic classes that implement basic loot drop tables and loot drop items (LDI) on which we can extend and build more complex systems.
Goal
In Unity we want to have a “GameObject” or a “ScriptableObject” whose script can contain a loot drop table type property. Loot drop table will give us the ability to add items to it’s list, assign item’s probability and randomly pick them based on their weight.
For example, loot drop item can be an enemy that will be spawned in certain area, a rare or a common sword which the player can acquire from treasure chest, an integer which represents the tile id in our tilemap… or whatever we want it to be.
Also we want to have a control over probability of this item being picked by our loot drop table script and here’s the reason we want to assign a weight to each item separately. Weight in our case is nothing else but an integer. Higher the integer, higher the chances of item being picked.
We’re gonna create a “treasure chest” which will “spawn” different items each time we start the game. We will have the ability to assign which item can spawn and what is it’s probability / weight.
About logic in our loot drop table
Our LDT script combines items to a list, ads up items weights and based on weight’s sum, sets the ranges to which the item belongs. LDT script then picks a random number from “0 – sum of all item weights” and based on that randomly selected number, picks the item.
Example
Total weight of 2 items is 120. Weight of first item is 50 and weight of second item is 70. Based on their weights, LDT assigns that the first item belongs to a range 0-50 and the second item belongs to a range 50-120. Based on these numbers, LDT then picks a random number between 0 and 120. If it picked a number which is for example “76”, it means that the second item was picked. Now that we know which item was picked, we can do whatever we want with it.
For better understanding what’s happening, check out the video above.
So in the end we want to create 2 abstract classes (genericLootDropItem.cs and genericLootDropTable.cs) which can represent different value types. Then we can inherit different variations of LDTs and LDIs by passing them a type. In our case, we’re gonna create an GameObject variation of LDT and LDI.
Because they can represent different values, I saw a solution in using generics. If you aren’t familiar with generics, you can check out this cool tutorial about generics made by Brackeys.
The code
When writing “nested” generic code, the biggest “problem” I’ve encountered was the inablity to assign the items to a LDT via Unity’s inspector. In my understanding the “problem” is that unity can’t serialize generic properties which are multiple level deep.
One of the consequence is that these properties don’t show up in the inspector and we can’t assign them via inspector even if the code is without an error.
My workaround for this problem is that we create an abstract generic class for LDT and LDI from which we inherit other classes based on the type we want to use. This way we “trick” Unity in a way that it show’s up properties in the inspector and we don’t have to write a lot of code over and over again.
GenericLootDropItem script
Let’s start by writing the most basic element of our system, which is a GenericLootDropItem:
It holds information about the item it represents.
It has weight.
For information purposes it displays item’s chance of being picked (in percents).
It holds information about the range it belongs to.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// Item that can be picked by a LootDropTable.
/// </summary>
public abstract class GenericLootDropItem<T>
{
// Item it represents - usually GameObject, integer etc...
public T item;
// How many units the item takes - more units, higher chance of being picked
public float probabilityWeight;
// Displayed only as an information for the designer/programmer. Should not be set manually via inspector!
public float probabilityPercent;
// These values are assigned via LootDropTable script. They represent from which number to which number if selected, the item will be picked.
[HideInInspector]
public float probabilityRangeFrom;
[HideInInspector]
public float probabilityRangeTo;
}
After we know how our item looks like, we can continue with writing GenericLootDropTable script.
GenericLootDropTable script
It’s the brain of our loot drop table system.
Contains a list of LDIs.
Holds information about total weight of all LDIs.
It has a method which validates all of assigned LDIs (set’s their range from, range to, calculates percents).
It also has a method which returns the “randomly” picked LDI from it’s list.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// Class serves for assigning and picking loot drop items.
/// </summary>
public abstract class GenericLootDropTable<T, U> where T : GenericLootDropItem<U>
{
// List where we'll assign the items.
[SerializeField]
public List<T> lootDropItems;
// Sum of all weights of items.
float probabilityTotalWeight;
/// <summary>
/// Calculates the percentage and asigns the probabilities how many times
/// the items can be picked. Function used also to validate data when tweaking numbers in editor.
/// </summary>
public void ValidateTable(){
// Prevent editor from "crying" when the item list is empty :)
if(lootDropItems != null && lootDropItems.Count > 0){
float currentProbabilityWeightMaximum = 0f;
// Sets the weight ranges of the selected items.
foreach(T lootDropItem in lootDropItems){
if(lootDropItem.probabilityWeight < 0f){
// Prevent usage of negative weight.
Debug.Log("You can't have negative weight on an item. Reseting item's weight to 0.");
lootDropItem.probabilityWeight = 0f;
} else {
lootDropItem.probabilityRangeFrom = currentProbabilityWeightMaximum;
currentProbabilityWeightMaximum += lootDropItem.probabilityWeight;
lootDropItem.probabilityRangeTo = currentProbabilityWeightMaximum;
}
}
probabilityTotalWeight = currentProbabilityWeightMaximum;
// Calculate percentage of item drop select rate.
foreach(T lootDropItem in lootDropItems){
lootDropItem.probabilityPercent = ((lootDropItem.probabilityWeight) / probabilityTotalWeight) * 100;
}
}
}
/// <summary>
/// Picks and returns the loot drop item based on it's probability.
/// </summary>
public T PickLootDropItem(){
float pickedNumber = Random.Range(0, probabilityTotalWeight);
// Find an item whose range contains pickedNumber
foreach (T lootDropItem in lootDropItems)
{
// If the picked number matches the item's range, return item
if(pickedNumber > lootDropItem.probabilityRangeFrom && pickedNumber < lootDropItem.probabilityRangeTo){
return lootDropItem;
}
}
// If item wasn't picked... Notify programmer via console and return the first item from the list
Debug.LogError("Item couldn't be picked... Be sure that all of your active loot drop tables have assigned at least one item!");
return lootDropItems[0];
}
}
You might ask yourself why we’re not inheriting this class from MonoBehaviour and not validating the LDIs in OnValidate method. I’ll explain the reason in the lower section 🙂
Now that we have base generic classes, we can create LDT and LDI for GameObject type.
GenericLootDropItemGameObject script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// When we're inheriting we have to insert GameObject as a type to GenericLootDropItem
/// </summary>
[System.Serializable]
public class GenericLootDropItemGameObject : GenericLootDropItem<GameObject> {}
GenericLootDropTableGameObject script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// When inheriting first we have to insert GenericLootDropItemGameObject instead of T and a GameObject instead of U
/// </summary>
[System.Serializable]
public class GenericLootDropTableGameObject : GenericLootDropTable<GenericLootDropItemGameObject, GameObject>{}
TreasureChest script
It’s the script that represents the treasure chest itself. For the tutorial’s purpose we’re gonna try to keep it as simple as possible. It’s main goal is:
When the game starts it picks and generates items from it’s LDT property.
Validates LDTs and LDIs.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// The most simple treasure chest script ever made :P basically on game start it spawns items in a straight line.
/// </summary>
[System.Serializable]
public class TreasureChest : MonoBehaviour {
// Loot drop table that contains items that can spawn
public GenericLootDropTableGameObject lootDropTable;
// How many items treasure will spawn
public int numItemsToDrop;
// Runs when we start our game
public void Start(){
// Spawn objects in a straight line
DropLootNearChest(numItemsToDrop);
}
void OnValidate(){
// Validate table and notify the programmer / designer if something went wrong.
lootDropTable.ValidateTable();
}
/// <summary>
/// Spawning objects in horizontal line
/// </summary>
/// <param name="numItemsToDrop"></param>
void DropLootNearChest(int numItemsToDrop){
for (int i = 0; i < numItemsToDrop; i++)
{
GenericLootDropItemGameObject selectedItem = lootDropTable.PickLootDropItem();
GameObject selectedItemGameObject = Instantiate(selectedItem.item);
selectedItemGameObject.transform.position = new Vector2(i/2f, 0f);
}
}
}
Because this script unlike GenericLootDropTable inherits from MonoBehaviour, It also has a role for validating LDTs and LDIs. Basically it calls LDT’s ValidateTable method in OnValidate method which validates values as soon as we assign them in the inspector.
The main reason for calling LDT’s ValidateTable method inside the TreasureChest script is that if we inherit the GenericLootDropTable from MonoBehaviour we don’t see LDI’s exposed properties.
If GenericLootDropTable inherits from MonoBehaviour
If GenericLootDropTable doesn’t inherit from MonoBehaviour
Now that we have every script we need, we can easily recreate the demo scene from the video.
Summary
Our loot drop table belongs to more “primitive systems” out there 😀 It can be improved and modified in many ways. Here’s the link to my github repo from where you can easily download unity package and test it out yourself.
What I really like about our simple system is that for an example we could really quickly create LDT and LDI of an integer type and modify our treasure chest script in a way that besides dropping items, it would also drop golden coins or something else.
This is my first tutorial and I hope that some of you will find it helpful. If any of you fellow readers have a suggestion, or have an idea on what I could improve, or if you noticed a bug, please let me know in the comments down below.
