https://github.com/manjitbedi/cubetrip

experimenting with Scene Kit & Swift
https://github.com/manjitbedi/cubetrip

Last synced: 2 months ago
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experimenting with Scene Kit & Swift

• Host: GitHub
• URL: https://github.com/manjitbedi/cubetrip
• Owner: ManjitBedi
• Created: 2014-11-14T23:02:26.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2016-07-03T22:57:36.000Z (over 8 years ago)
• Last Synced: 2023-02-26T21:31:52.616Z (almost 2 years ago)
• Language: Swift
• Size: 1.54 MB
• Stars: 5
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
##CubeTrip

This started out a experiment with using SceneKit to display some cubes; it is now doing more than that.  I keep adding new scenes as try things out.

Experimenting with Scene Kit, Sprite Kit and Swift. This is a proof of concept for some visual ideas.

1) Cubes 

Some shapes created in at run-time & some shapes read in from a DAE file.  It is kind of ropey to be perfectly honest.  😀  It was my first project with learning SceneKit

2) Experimenting with multiple shapes & animating them.  

* Actions for rotations are set up to loop in the SCN file for the 3D obejcts in the scene

* A skybox is set at run-time by passing in a array of 6 PNG file names.  The star field was created using some open source software. 

http://alexcpeterson.com/spacescape/

3) Sprite Kit 

* this experiment shows a moving sprite texture with a light node; the texture is using a mask value set in the SK scene file that matches the light node.

Note: ideally, the light node would be tied to the movement of the light wave in the fragment shader. That probably would require quite a bit of re-factoring.  😬

4) Scene Kit - camera movement & object tracking

* create a scene from placing nodes in a SCN file & then at run-time associate

.OBJ files for the road, terrain & trees

* a path is created by using the road nodes in the SCN file.

* added some objects to the scene

* there are 2 cameras

* the road & nature objects are from a public domain collection of 3D assets (donations welcome)

http://kenney.nl/assets/3d-road-tiles

Note: this first pass was a good result but it is not very maintainable.  Things to do differently.

* Use shape primtives for the objects that specify the node for the road in the SCN file - to be able to see them!

* change the way the 3D objects are attached to nodes;  I should check how anchor points work in this context.  When rotating the objects;  it seems they are being rotated from a corner & not the centre of the object.

* There is a problem with the tree & road meshes having the materials turn on & off.  What am I missing?

It took some thinking & experimenting; I got a camera to move with a node & follow the object using scene constraints.