Pixel PERFECT Mouse Picking | Coding a 2D Game Engine in Java #31

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United States GamesWithGabe
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Published on ● Video Link: https://www.youtube.com/watch?v=8fAJ1AzWFTs


Duration: 33:51
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In this episode I discuss a very hard to find topic, 3D picking. This is how to get pixel perfect picking detection for when a user of the engine clicks on one of the objects in the game scene. This technique also works for alpha blended objects, so if you have a game object in the world that is a donut, you can click through the donut hole to the object behind the donut, and get the correct result. This is a huge necessity in any software, because when a user clicks on an object they expect to get that object. This also allows us to use these results to begin editing different objects in our game world.

Source Code: https://github.com/codingminecraft/MarioYoutube/tree/5f1fcf47d10abdf682afd4105900041c449528f0

0:00 Intro
2:08 How 3D Picking Works
5:05 Coding 3D Picking

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Website: https://ambrosiogabe.github.io/
Github: https://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: https://www.gameenginebook.com/
Game Physics Cookbook (Read this before the next physics book): https://www.amazon.com/Game-Physics-Cookbook-Gabor-Szauer/dp/1787123669
Game Physics (Ian Millington): https://www.amazon.com/Game-Physics-Engine-Development-Commercial-Grade/dp/0123819768
Game Programming Patterns (Free): https://gameprogrammingpatterns.com/

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

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

Outro Music: https://www.bensound.com/royalty-free-music



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