Mouse Screen Coordinates to Game Viewport Coordinates  | Coding a 2D Game Engine in Java #30 @GamesWithGabe
Mouse Screen Coordinates to Game Viewport Coordinates  | Coding a 2D Game Engine in Java #30  @GamesWithGabe
Uploaded September 2020 | Updated September 2026, 3 weeks ago
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In this episode we fix the bug from the last episode where the mouse coordinates were being calculated incorrectly because of the new position of the game viewport. This was a simple fix by calculating the world coordinates using screen coordinates relative to the game viewport's position and size.

Source Code: github.com/codingminecraft/MarioYoutube/tree/535a6fd595004f45ee77589bf9eefe3ba7681f4a

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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
Mouse Screen Coordinates to Game Viewport Coordinates  | Coding a 2D Game Engine in Java #30I Coded a Video Editor (and it kind of sucks)Debug Drawing Functions | Coding a 2D Game Engine in Java #24Creating 2D Primitives | Coding a 2D Physics Engine in Java #3Box-Select, Deleting, and Rotating Selected Objects | Coding Geometry Dash in Java #28Basic Vector Math | Coding a 2D Physics Engine in Java #2Framebuffers in OpenGL | Coding a 2D Game Engine in Java #27Textures in OpenGL | How to Code Minecraft Ep. 4Integrating JBox2D in our Engine | Coding a 2D Game Engine in Java #37Resource Management in LWJGL3 | Coding a 2D Game Engine in Java #12Debug Drawing Boxes and Circles | Coding a 2D Game Engine in Java #262K Subs?! Thanks! (And Some Channel Updates)
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Mouse Screen Coordinates to Game Viewport Coordinates | Coding a 2D Game Engine in Java #30

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