Uploaded October 2020 | Updated September 2026, 3 weeks ago
Join the Discord: discord.gg/4tHeAkxNg7
In this episode I expand on the gizmo that we were creating in the previous episode. We implement the functionality so that the translate gizmo actually translates the objects, then we refactor it to be easily extendible and create a scale gizmo using the same code. I also go over how to create proper mouse drag event detection, and add the proper mouse dragging into the event handler. And finally, I add a gizmo system that allows the user to switch between gizmo modes (translate, scale, etc) and then manipulate the active game object in different ways.
Gizmos.png: github.com/codingminecraft/MarioYoutube/blob/master/assets/images/gizmos.png
Source Code: github.com/codingminecraft/MarioYoutube/tree/0536788742c4a212742319f9b8132f0ea9de29d5
0:00 Intro
1:01 How Translate/Scale Gizmos Work
4:40 Coding the Drag Listener
10:57 Coding Gizmo Hover State
16:41 Fixing Flying Gizmo Bug
19:13 Coding Active Gizmo State
21:14 Refactoring TranslateGizmo into Gizmo
25:19 Fixing MouseListener Drag Bug
26:19 Coding Scale Gizmo
28:32 Coding Gizmo System
32:39 Conclusion and Upcoming Episode
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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
Join the Discord: discord.gg/4tHeAkxNg7
In this episode I expand on the gizmo that we were creating in the previous episode. We implement the functionality so that the translate gizmo actually translates the objects, then we refactor it to be easily extendible and create a scale gizmo using the same code. I also go over how to create proper mouse drag event detection, and add the proper mouse dragging into the event handler. And finally, I add a gizmo system that allows the user to switch between gizmo modes (translate, scale, etc) and then manipulate the active game object in different ways.
Gizmos.png: github.com/codingminecraft/MarioYoutube/blob/master/assets/images/gizmos.png
Source Code: github.com/codingminecraft/MarioYoutube/tree/0536788742c4a212742319f9b8132f0ea9de29d5
0:00 Intro
1:01 How Translate/Scale Gizmos Work
4:40 Coding the Drag Listener
10:57 Coding Gizmo Hover State
16:41 Fixing Flying Gizmo Bug
19:13 Coding Active Gizmo State
21:14 Refactoring TranslateGizmo into Gizmo
25:19 Fixing MouseListener Drag Bug
26:19 Coding Scale Gizmo
28:32 Coding Gizmo System
32:39 Conclusion and Upcoming Episode
---------------------------------------------------------------------
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
