njRotateLightZ | Japanese
    <-|INDEX|->
Rotates a light matrix around the Z axis.

### FORMAT

      #include <NINJA.H>
      void njRotateLightZ( *ptr, angz )
      NJS_LIGHT *ptr
      Angle angz

### PARAMETERS

*ptr
  light pointer
angz
  angle of rotation around Z axis

### RETURN VALUE

  Mone

### ERROR VALUE

  ‚È‚µ

### FUNCTION

- Rotates a light matrix defined with njCreateLight around the Z axis.
- This results in calculation of the light source position and direction.

### EXAMPLE

      #include <NINJA.H>
      ...........

      NJS_LIGHT light;

      njInitSystem();
      njCreateLight(&light, NJD_POINT_LIGHT);

      ...........
      njClearMatrix();

      /* Rotate 30 degrees around Z axis */
      njRotateLightZ(&light, NJM_RAD_ANG(NJD_PI/6.f));

### NOTES

- Before calling this function, the light to be modified must be specified by njCreateLight and njClearMatrix must be called.

### RELATED TOPICS

  njCreateLight()

njRotateLightZ |
    <-|INDEX|->