上QQ阅读APP看书，第一时间看更新
We already learned how to create a complex scene, but without light and shadow, a scene won't be complete.
In this chapter, we will learn about:
- The types of different light sources Ogre 3D supports and how they work
- Adding shadows to a scene and the different shadow techniques available
- What a camera and viewport are and why we need to have them
Before we can add lights to our scene, we first need to add a plane, onto which shadows and light are projected, and therefore visible to us. A normal application wouldn't need a plane because there would be a terrain or a floor to project light onto. Light calculation would work without the plane, but we wouldn't be able to see the effect of the light.