Uploaded March 2025 | Updated September 2026, 2 weeks ago

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In this lesson we'll continue creating our level's 3D 'gumdrop' enemies, by making them detect collisions with the player! .. in two ways: if the playable robot character touches an enemy from the side -- ouch!, the game switches to another game screen (or, the game restarts), and if the robot jumps on the enemy, the enemy gets squashed, stops, and disappears after a second, while the robot bounces off the enemy into the air.

Thanks for watching! Here are the video chapter timecode links:

- 0:00 - Video Intro
- 0:07 - Lesson Overview
- 0:38 - Getting Started
- 1:39 - Adding a Sides-Checker
- 3:54 - SidesChecker's Layers & Masks
- 5:17 - The SidesChecker's Signal & Function
- 6:21 - Coding Enemy Side Collisions
- 7:49 - Adding a Top-Checker
- 8:24 - TopChecker's Layers & Masks
- 9:55 - TopChecker's Signal + Code
- 12:51 - Creating a bounce() function
- 14:36 - Preventing Double Collisions
- 16:38 - Stop the Enemy (on Squash)!
- 21:04 - Make the Enemy Disappear (1 second delay)
- 24:12 - Wrap-Up & Outro

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Play and Download the Finished 3D Platformer Game Online Now!: borncg.itch.io/3d-platformer-game (use: Chrome/Edge/Firefox to play the web game version)
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*note: in this lesson I use Godot 4.1
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Visit this Godot 4 Beginners 3D Platformer Course playlist!:
youtube.com/playlist?list=PLda3VoSoc_TTp8Ng3C57spnNkOw3Hm_35

Visit my Let's Learn Blender! Tutorial Series playlist:
youtube.com/playlist?list=PLda3VoSoc_TQrLrt-voecHs0Mb5qzk2S3

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Nicolas from the band 'The Lazy Saviours' created my Intro Jingle!
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