glsl::MotionBlur_gather_pix Class Reference

This is designed to read from a G3D-style velocity (optical flow) buffer. More...

Public Member Functions
float	cone (float dist, float r)
float	cylinder (float dist, float r)
float	fastCone (float dist, float invR)
float	hash (int2 c)
	Computes a pseudo-random number on [0, 1] from pixel position c. More...
void	main ()
float3	readAdjustedNeighborhoodVelocity (int2 C, out float r)
	NeighborMax[C] from the paper. More...
float3	readAdjustedVelocity (int2 C, sampler2D sampler, out float r)
	Called from readAdjustedVelocity() and readAdjustedNeighborhoodVelocity() More...
float3	readAdjustedVelocity (int2 C, out float r)
	V[C] in the paper. More...
float	softDepthCompare (float depth_A, float depth_B)
	0 if depth_A << depth_B, 1 if depth_A >> z_depth, fades between when they are close More...
float	softZCompare (float z_A, float z_B)

Public Attributes
uniform sampler2D	colorBuffer
	No guard band. More...
uniform sampler2D	depthBuffer
	Typical hyperbolic depth buffer: close values are greater than distant values. More...
uniform float	exposureTime
	In fraction of frame duration. More...
const float	HALF_PIX = 0.5
float2	jitter
	Amount on [-0.5, 0.5] to randomly perturb samples by at each pixel. More...
uniform sampler2D	neighborMinMax_buffer
	Uses the same encoding as SS_POSITION_CHANGE but has three channels. More...
uniform sampler2D	randomBuffer
	32x32 tiled random numbers More...
out float3	resultColor
uniform sampler2D	SS_POSITION_CHANGE_buffer
	Unprocessed differences between previous and current frame in screen space. More...
uniform vec4	SS_POSITION_CHANGE_readAddSecond
uniform vec4	SS_POSITION_CHANGE_readMultiplyFirst
uniform ivec2	trimBandThickness

Detailed Description

This is designed to read from a G3D-style velocity (optical flow) buffer.

For performance, you could just write out velocity in the desired format rather than adjusting it per texture fetch.

Member Function Documentation

cone()

float glsl::MotionBlur_gather_pix::cone ( float  dist, float  r  )

inline

cylinder()

float glsl::MotionBlur_gather_pix::cylinder ( float  dist, float  r  )

inline

fastCone()

float glsl::MotionBlur_gather_pix::fastCone ( float  dist, float  invR  )

inline

hash()

float glsl::MotionBlur_gather_pix::hash ( int2  c )

inline

Computes a pseudo-random number on [0, 1] from pixel position c.

main()

void glsl::MotionBlur_gather_pix::main ( void  )

inline

readAdjustedNeighborhoodVelocity()

float3 glsl::MotionBlur_gather_pix::readAdjustedNeighborhoodVelocity ( int2  C, out float  r  )

inline

NeighborMax[C] from the paper.

readAdjustedVelocity() [1/2]

float3 glsl::MotionBlur_gather_pix::readAdjustedVelocity ( int2  C, sampler2D  sampler, out float  r  )

inline

Called from readAdjustedVelocity() and readAdjustedNeighborhoodVelocity()

(xy) is the velocity, z is the minimum blur radius in the tile for neighbor velocity and zero for expressive motion.

readAdjustedVelocity() [2/2]

float3 glsl::MotionBlur_gather_pix::readAdjustedVelocity ( int2  C, out float  r  )

inline

V[C] in the paper.

v = half-velocity vector r = magnitude of v

softDepthCompare()

float glsl::MotionBlur_gather_pix::softDepthCompare ( float  depth_A, float  depth_B  )

inline

0 if depth_A << depth_B, 1 if depth_A >> z_depth, fades between when they are close

softZCompare()

float glsl::MotionBlur_gather_pix::softZCompare ( float  z_A, float  z_B  )

inline

Member Data Documentation

colorBuffer

uniform sampler2D glsl::MotionBlur_gather_pix::colorBuffer

No guard band.

depthBuffer

uniform sampler2D glsl::MotionBlur_gather_pix::depthBuffer

Typical hyperbolic depth buffer: close values are greater than distant values.

Guard band.

exposureTime

uniform float glsl::MotionBlur_gather_pix::exposureTime

In fraction of frame duration.

HALF_PIX

const float glsl::MotionBlur_gather_pix::HALF_PIX = 0.5

jitter

float2 glsl::MotionBlur_gather_pix::jitter

Amount on [-0.5, 0.5] to randomly perturb samples by at each pixel.

neighborMinMax_buffer

uniform sampler2D glsl::MotionBlur_gather_pix::neighborMinMax_buffer

Uses the same encoding as SS_POSITION_CHANGE but has three channels.

No guard band.

randomBuffer

uniform sampler2D glsl::MotionBlur_gather_pix::randomBuffer

32x32 tiled random numbers

resultColor

out float3 glsl::MotionBlur_gather_pix::resultColor

SS_POSITION_CHANGE_buffer

uniform sampler2D glsl::MotionBlur_gather_pix::SS_POSITION_CHANGE_buffer

Unprocessed differences between previous and current frame in screen space.

Guard band.

SS_POSITION_CHANGE_readAddSecond

uniform vec4 glsl::MotionBlur_gather_pix::SS_POSITION_CHANGE_readAddSecond

SS_POSITION_CHANGE_readMultiplyFirst

uniform vec4 glsl::MotionBlur_gather_pix::SS_POSITION_CHANGE_readMultiplyFirst

trimBandThickness

uniform ivec2 glsl::MotionBlur_gather_pix::trimBandThickness