03 Unstable Rotation by GamePhysics101 - 2

Physics

The code for my Game Physics course: https://www.udemy.com/gamephysics

Unity 5.1.1f1MIT LicenseUpdated 3 years agoCreated on June 22nd, 2015
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### Section 3 Assets

• Section Assets Pack
• Previous section project, for Magnus Effect

### Unstable Rotation In Unity 5

• The limitations of spinning objects in Unity 5.
• Why unstable rotation doesn’t evolve.
• How to model unstable rotation in game physics.

### Introducing Inertia Tensors

• Roughly what is an inertia tensor (I)?
• Unstable intermediate axis
• How Unity Calculates I
• Calculate I for your phone
• Predict it’s unstable axis

### Calculating Moment Of Inertia

• How about if two axis are equal?
• Try it with a spinning cylinder.
• Calculate the moment of inertia.
• Render vs. collider mesh influence.

### “Newton’s Laws Of Rotation”

• A recap of Newton’s laws of motion.
• How these relation to rotation.
• Important differences.
• Why we’re jumping in the deep end!

### Applying Torque To Rigidbodies

• How to use Unity’s AddTorque() method.
• How Inertia Tensor affects rotation.
• Comparing the rotation of two objects.

### Vector Cross Products

• What a cross product is.
• Why they are so useful.
• Using WolframAlpha to calculate.

### The Magnus Effect

• What the Magnus Effect is.
• How we can approximate ball flight with it.
• Using Vector3.Cross in Unity.

### Section 3 Wrap-Up

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