This project demonstrates how to create volumetric effects from map data using a Metal shader with SCNProgram. It's a companion to this post about volumetric weather.
The example uses the most recent data from Real Earth to render volumetric clouds over San Francisco.
Install the Mapbox SceneKit using Carthage:
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Clone this repo.
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Run
carthage update --platform iOSto build the iOS dependencies. -
Follow instructions 3-5 of Carthage’s iOS integration instructions. Your application target’s Embedded Frameworks should include MapboxSceneKit.framework and MapboxMobileEvents.framework.
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Add your access token to the
MGLMapboxAccessTokenfield in info.plist.
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Because the sample uses up-to-date satellite imagery, clouds won't appear on clear days or after dark. To view a specific time of day, you can modify the tile request using RealEarth's documentation.
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The volumetric rendering is done using a Metal shader, and isn't compatible with the iOS simulator. Build to a physical device for the best results.
scenekit-volumetric-weather is licensed under BSD2. If you build something with this code, please mention it in your readme so that others can learn about the resource.