Shake - RBlur

RBlur

Function
The RBlur function blurs the image radially from a center point, creating flare effects. Although an expensive process, it is extremely accurate. The entire image is blurred, based on the range from the inner radius to the outer radius. A pixel outside of the oRadius distance is blurred by the oRadius amount. A pixel inside of the iRadius amount is not blurred. A pixel between iRadius and oRadius is blurred by a percentage of its position between the two Radius parameters. You can also use the mirror parameter to blur beyond the center point, as well as use a negative amplitude to sample pixels away from the center rather than toward the center.

Parameters	Type	Defaults	Function
x/yCenter	float	width/2, height/2	The center point of the blur.
iRadius	float	10	The distance from the Center that contains the blur sample area.
oRadius	float	20	The outer edge for the blur area
aspectRatio	float	1	The aspect ratio of the pixels for anamorphic images.
damp	float	1	A gamma value on the blur
amplitude	float	.5	The amount of blur. This number can also be negative.
quality	float	.25	The amount of samples. A quality of 1, the maximum, means 64 samples.
mirror	int	0	This will consider points past the center area if your amplitude is high enough when it is turned on.

Synopsis

image RBlur( image, 
  float percent,
  float xCenter, 
  float yCenter 
  float iRadius,
  float oRadius,
  float aspectRatio,
  float damp,
  float amplitude,
  float quality,
  int mirror
 );

Script

image = RBlur( image, xCenter, yCenter, iRadius, etc....);

Command Line

shake -rblur percent xCenter yCenter iRadius etc....