This document discusses data structures and operator overloading in C#. It introduces 2D matrices as 2D arrays and how they can be used to display pixels or create a grid. It then focuses on structs and operators, explaining how to create movement for ghosts using operator overloading, static helper methods, and implicit/explicit conversion operators. The timeline outlines introducing operator overloading and conversion operators before implementing ghost movement in a PacBear game project.

1. Math & Data Structures
PacBear – Structs & Operators

2. Recap: A 2D World

3. What did we learn?
• Using a 2D array
• Generate a world on runtime
• Structs vs Classes
• Creating IntVectors

4. 2D Matrices
• What is a 2D Matrix?
• A regular array is considered a 1-dimensional array
• A 2D Matrix = 2D Array
• A 2D Matrix is (almost) the same as an array of arrays
• When would we use it?
• Displaying pixels
• Creating snake
• Anything with a grid

5. PacBear – Structs & Operators

6. What will we learn?
• How to create movement for our Ghosts
• Creating static helper methods
• Operator overloading
• https://docs.microsoft.com/en-us/dotnet/csharp/language-
reference/operators/operator-overloading
• Implicit & Explicit conversion operators
• https://docs.microsoft.com/en-us/dotnet/csharp/language-
reference/operators/user-defined-conversion-operators

7. Timeline
15 45 10 45 10 45 10
Intro Operator overloading Conversion operators Ghost movement

8. Let’s get going!
• Open Unity Hub
• Open PacBear Project

9. Challenges
1. Create static helper properties for the IntVector2, such as
backward, left & right, and use those in PacBear & Ghost
2. Add a * and / division operator that multiply and IntVector2 by a
scalar (= float)
3. Update the Ghost Movement so it doesn’t turn in it’s previous
direction, unless it has no other choice!