##### Ninja Library - Camera Function

# njRollCameraInterest

Rotate camera visual axis around local Z axis

### FORMAT

`

  void njRollCameraInterest( *c, ang )
  NJS_CAMERA *c
  Angle ang

`

### PARAMETER

  `*c` | Pointer to camera structure
  `ang` | Rotation angle (relative value)

### RETURN

  None

### DESCRIPTION

  Rotates the camera visual axis around the Z axis of the local coordinate system.

### EXAMPLE

      Camera is at (0, 0, 0) and facing (0, 0, -1) direction.
      The following leaves camera position as is and rotate only visual axis
      by 90 degrees around Z axis.

      NJS_CAMERA c;
      njInitCamera(&c);
      njRollCameraInterest(&c, NJM_DEG_ANG(90));
      njSetCamera(&c);

njRollCameraInterest

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