Augmented Reality for Developers

Rotating the earth

In the previous chapter, we implemented an animation using the Unity graph editors for animator states and animation curves. This time, we will do it using C# scripting.

Earth rotates once a day! (You knew that.) That is about 15 degrees per hour (360/24). If we wanted to go for realism, it might be a little boring to have to watch our model spin at that rate (and when we add the sun, we'd have to wait for a year to watch the animation of a complete orbit). Instead, let's rotate all the way in 24 seconds. That's one game second per real hour.

We'll write a quick script to spin the globe. If you're new to programming, just follow along and then read the introduction to programming in the next section:

1. In Hierarchy, select ...