romanroibu / udacity-arkit-swift-project

Perform a Magic Trick | Learn ARKit with Swift Nanodegree | Udacity

Perform a Magic Trick

Project for the "Learn ARKit with Swift" Udacity Nanodegree.

Prerequisite

• Xcode 9.3 (9E145)

Instructions

• Open the app
• Find a flat horizontal surface
  • The magic hat will appear when that surface is detected, and the butttons will become active
• Tap the "Throw" button to throw a ball
• Tap the "Magic" button to make the balls disappear/reappear

udacity-arkit-swift-project's Issues

Apply physics where necessary to simulate collisions and the illusion that the hat is "real"

Make sure to add an SCNFloor and a SCNPhysicsBody to the magic hat so that the balls can land within the hat!

For debugging purposes, such as viewing the physics shape of 3D objects, you can set the debugOptions on your ARSCNView.

sceneView.debugOptions = [.showPhysicsShapes]

Place the created hat on a detected plane

Once you've created a scene for your magic hat, turn on plane detection to detect surfaces in your environment. Once a plane has been detected and added to the ARSession, load the magic hat scene you've created into an SCNNode and add it to the created ARAnchor.

Add ability to throw a ball

Create the ball (i.e. an SCNSphere), either programmatically or using the SceneKit scene editor, and have the user be able to throw that ball by tapping a button on the UI.

Throwing a ball can be done in 3 steps:

1. position the ball in front of the camera using the camera's transform
2. add a SCNPhysicsBody to the ball
3. apply a force to the SCNPhysicsBody

Make balls within the hat disappear

Add a button on the UI to allow the user to make the balls captured within the hat disappear. You will need to use the magic hat's bounding box to detect if the balls are inside the hat.

Create a 3D magic hat in SceneKit

Create a hat 3D model in SceneKit by combining different SCNGeometry subclasses. Make sure to nest all SCNGeometry objects within the same SCNNode. Play around with lighting as well to make your hat stand out!