Pro OpenGL ES for iOS

CHAPTER 4: Turning On the Lights (^97)
Figure 4-3. Simulated lighting from below (left) and a higher polygon count to simulate shading (right)

1. Create a new header to hold some of the systemwide values, and call it
   OpenGLSolarSystem.h. For now, it should contain just the following two
   lines:
   #import <OpenGLES/ES1/gl.h>
   #define SS_SUNLIGHT GL_LIGHT0 //GL uses GL_LIGHTx


2. Add #import "OpenGLSolarSystem.h" to the top of the solar-system view
   controller.


3. Add the code in Listing 4-1, and call it from your viewDidLoad() method
   in the viewcontroller where all of the other initializers reside. And make
   sure to set the current context; otherwise, you’ll not see a thing.