Point vs. Primitives | Coding a 2D Physics Engine in Java #4 @GamesWithGabe
Point vs. Primitives | Coding a 2D Physics Engine in Java #4  @GamesWithGabe
Uploaded July 2020 | Updated September 2026, 2 weeks ago
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This episode is about creating functions to check if a point is on, or in, a primitive shape. The primitve shapes we have are box2D (Oriented Bounding Box OBB), AABB (Axis Aligned Bounding Box), circle, and Line2D. So we write functions to check if a point is on a line, or if a point is in a circle, or if a point is in an AABB. I save checking if a point is in an OBB for the next tutorial, where we will also create some utility functions for comparison and other common math operations.

Source Code: github.com/codingminecraft/MarioYoutube/tree/83cf8315f7feee28ac0b0c72fbf2042c9b1f4809

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Website: ambrosiogabe.github.io
Github: github.com/ambrosiogabe

Here are some books I recommend if you want to learn about game engine development more thoroughly. I do not profit off any of these sales, these are just some books that have helped me out :)

My Recommended Game Engine Books:
Game Engine Architecture: gameenginebook.com
Game Physics Cookbook (Read this before the next physics book): amazon.com/Game-Physics-Cookbook-Gabor-Szauer/dp/1787123669
Game Physics (Ian Millington): amazon.com/Game-Physics-Engine-Development-Commercial-Grade/dp/0123819768
Game Programming Patterns (Free): gameprogrammingpatterns.com

My Recommended Beginning Game Programming Books:
JavaScript Game Design: apress.com/gp/book/9781430247166

My Recommended Java Books:
Data Structures/Algorithms: amazon.com/Data-Structures-Algorithms-Java-6th-ebook/dp/B00JDRQF8C
LWJGL (Free, but I haven't read this thoroughly): lwjglgamedev.gitbooks.io/3d-game-development-with-lwjgl/content

Outro Music: bensound.com/royalty-free-music
Point vs. Primitives | Coding a 2D Physics Engine in Java #4Z-Index Rendering | Coding Geometry Dash in Java #20Iterative Linear Impulse Resolution | Coding a 2D Physics Engine in Java #15ImGui in LWJGL (UPDATE) | LWJGL Series #3Coding Gravity | Coding Geometry Dash in Java #9Deserialization Part 1 | Coding Geometry Dash in Java #15Generating Font SDFs (Signed Distance Fields) | Font Rendering in Java #4Serialization with Gson | Coding a 2D Game Engine in Java #19Starting Engine & Debug Lines | Cocoa Engine Devlog #6Physics and Stuff | Cocoa Engine Devlog #4Unit tests and Line vs Circle | Coding a 2D Physics Engine in Java #6Event Listeners | Coding Geometry Dash in Java #2
GamesWithGabe |

Point vs. Primitives | Coding a 2D Physics Engine in Java #4

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