This course is designed for intermediate users of Unity (see the Prerequisites for specific topics you should be familiar with before joining).
Though Unity comes pre-packaged with an excellent pathfinding system, we explore beyond using a black box to calculate paths through your game levels.
Pathfinding and search algorithms are a core component of game development. If you want to level up your skills, enroll today and dive into implementing your own version of A* search!
Through a carefully crafted set of lectures we learn search algorithms, starting with Breadth-First Search, diving in Dijkstra's algorithm and culminating with the industry-standard A* search for pathfinding.
All concepts are presented with easy-to-understand visuals!
Some other bonus features of those course:
Before you begin this course, please review the prerequisites. This course is intended for Intermediate Unity developers with experience in C# scripting.
Let's review the basics of pathfinding. Graphs are a set of interconnected nodes, which are joined by edges. We will apply this data structure to a physical map, allowing us to solve for a path through a maze.
Each graph is made of nodes. Let's define a class for our most basic object, the Node.
In this lesson, we define a MapData class, designed to read the level data into the Graph.
We will create a Graph class to manage the various nodes which will comprise our level.
Our nodes will be connected by proximity. In this lesson, we define a set of compass directions and establish how nodes and their neighbors are connected.
Let's use the MVC (Model View Controller) design pattern to create some new components. We will make an interface class called the NodeView specifically designed for displaying a Node onscreen.
Let's create another user interface class, the GraphView, for managing all of our NodeViews.
In this lesson, we review creating level data as a Text Asset, allowing us to store our map as a simple set of ASCII characters on disk.
In this lesson, we create the MakeMap method in the MapData class, allowing us to read the 1's and 0's from our ASCII Text Asset. Now we have a much easier means of generating our level maps!
We can use the Resources command to help organize our project folders. Setting up the default Resources folder allows us to look for map data without needing to browse for files explicitly in the Inspector!
If using a text editor to create your level map is too cumbersome, let's use our favorite image editor to create a level! Using a one-pixel brush we can save our maze in a super small image file. This is a super interactive way to create new levels!
In this lesson, we tweak our Pathfinder search routine to implement A* search!
Wilmer Lin is a 3D and visual effects artist with over fifteen years of industry experience and has trained several hundred artists over the course of a decade. Now an independent game developer, Wilmer helps aspiring gamedevs learn the craft of programming and designing video games using Unity3D, Maya and Photoshop.