##### Ninja Library - Motion Function

# njLightMotion

Executes light motion

### FORMAT

`

  void njLightMotion( *light, *motion, frame )
  NJS_LIGHT *light
  NJS_MOTION *motion
  Float frame

`

### PARAMETER

  `*light` | Pointer to light structure
  `*motion` | Pointer to motion structure
  `frame` | Frame number

### RETURN

  None

### DESCRIPTION

  Draws the light motion according to motion data.

  Because floating-point notation is possible for frame numbers, interpolation of motion data is possible. For motions where the number of frames is 10, the frame number range is 0 to less than 10 (9.9999). For example, when the frame number is set to 0.5, the values for the mean between frame 0 and frame 1 are interpolated and drawn. Interpolation for frames between 9 and less than 10 (9.9999) is carried out between the last frame and the first frame.

### EXAMPLE

      #include <Shinobi.h>
      #define	MOTION	motion_sample
      #define	LIGHT	light_sample
      extern NJS_MOTION	MOTION[];
      extern NJS_LIGHT	LIGHT[];
      	:
      njSetLight(LIGHT);
      	:
      njLightMotion( LIGHT,MOTION,ff );
      ff+=0.2f;
      if( ff >= (MOTION->nbFrame-1) ) ff=0.f;
      	:

### NOTE

  This function is designed for use in NAL and NAM files, but it is also valid for light set with `njCreateLight()` etc.

### REFERENCE

  `njSetLight()
  njDrawMotion()
  `

njLightMotion

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