SCNTechniqueGlow
Very basic example of drawing a glow outline around a SceneKit node. Uses SCNTechnique with Metal shaders.
Code quality not guaranteed.
Based on / inspired by these nice SCNTechnique examples. https://github.com/lachlanhurst/SCNTechniqueTest https://github.com/kosua20/Technique-iOS
ARKit Usage
Update Main.storyboard to launch ViewController to view the ARSCNView demo.
FAQ
How do I make the blur larger?
For now you will have to manually add blur passes in NodeTechnique.plist. Check the 'sequence' key. This is where the blur passes are defined. Each blur stage requires two blur passes: a horizontal + vertical pass. So make sure to add 'pass_blur_h' along with 'pass_blur_v' or you will end up with an uneven glow.
How do I change the blur color?
You can pass the color from swift into the metal shader when setting up the technique here. It should look something like this:
let color = SCNVector3(1.0, 1.0, 0.0)
technique.setValue(NSValue(scnVector3: color), forKeyPath: "glowColorSymbol")
Author
This project was created by Laan Labs. We design and build solutions at the intersection of Computer Vision and Augmented Reality.
License
SCNTechniqueGlow is released under the MIT License. See LICENSE for details.