CODEWITHSUNDEEP
swiftscenekitscnnode
R_McVities
R_McVities

Reputation: 179

How to create a neon material using SCNMaterial in swift?

I've been experimenting with SCNMaterials, focussing on emission to try and create a neon material. Not sure if it is possible, but if it could emit light, that would be great. Thanks :)

Upvotes: 1

Views: 2324

Answers (2)

Nicolas Miari
Nicolas Miari

Reputation: 16256

In addition to the answer by @ProBlaster, you can also set the intensity of the emission, not just the contents.

This can be useful to animate an object into glowing progressively more and more: Set the contents to a bright color from the beginning, but the intensity to 0:

material.emission.contents = UIColor.white
material.emission.intensity = 0

(this will not glow)

Then, in an animation block, increase the intensity to (say) 1:

SCNTransaction.begin()
    SCNTransaction.animationDuration = 0.5
    SCNTransaction.animationTimingFunction = CAMediaTimingFunction(name: .easeIn)
    
    material.emission.intensity = 1

SCNTransaction.commit()

(Not sure you could get "automatic interpolation" of the color valued contents property in the animation block, like you do for the float-valued intensity)

Upvotes: 0

Pro Blaster
Pro Blaster

Reputation: 491

It's simple:

material.emission.contents = [NSColor greenColor];

all this does is make the material glow in it's own light.
If you wish to make other objects affected by this neon light,
you could add a light to your neon node like so:

SCNLight *mylight = [SCNLight light];
mylight.type = SCNLightTypeOmni;
mylight.color = [NSColor greenColor];
myNeonNode.light = mylight;

Hope that helped!

Note:

the power of the light can be controlled by the color you use:
Dark green will seem like a green light that is not so powerful.
Light green will seem like a green light that is more powerful.

Upvotes: 5

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