GPUShaders::Common::Materials Class Reference

Materials general shader. More...

Classes
struct	Material

Public Member Functions
float	encodeMaterial (uint material)
uint	decodeMaterial (float raw)
float	encodeMetalnessAndParameter (float metalness, float parameter)
void	decodeMetalnessAndParameter (float raw, out float metalness, out float parameter)
vec2	decodeIridescence (float ior, float thickness)
vec2	encodeRgbOn10Plus2Bits (vec3 rgb)
vec3	decodeRgbFrom10Plus2Bits (vec2 packed)
Material	initMaterial ()
Material	decodeMaterialFromGbuffer (vec2 uv, texture2D gbuffer0, texture2D gbuffer1, texture2D gbuffer2)

Detailed Description

Materials general shader.

See also

GPUShaders::Common::Samplers, GPUShaders::Common::Utils

Member Function Documentation

decodeIridescence()

vec2 GPUShaders::Common::Materials::decodeIridescence ( float  ior, float  thickness  )

inline

Convert the iridescence normalized values to the physical quantities.

Parameters

ior	the normalized index of refraction
thickness	the normalized thickness

Returns

a vector containing a refraction index in [1.2, 2.4] and a thickness in [300nm, 800nm]

decodeMaterial()

uint GPUShaders::Common::Materials::decodeMaterial ( float  raw )

inline

Decode a material ID from its G-buffer representation.

Parameters

raw	the raw value stored in the Gbuffer

Returns

the decoded material identifier

decodeMaterialFromGbuffer()

Material GPUShaders::Common::Materials::decodeMaterialFromGbuffer ( vec2  uv, texture2D  gbuffer0, texture2D  gbuffer1, texture2D  gbuffer2  )

inline

Populate material parameters from the G-buffer content.

Parameters

uv	the location in the G-buffer
gbuffer0	first texture of the G-buffer
gbuffer1	second texture of the G-buffer
gbuffer2	third texture of the G-buffer

Returns

the decoded material parameters

Bug:

There is a precision issue when decoding from the Gbuffer instead of an inline value.

decodeMetalnessAndParameter()

void GPUShaders::Common::Materials::decodeMetalnessAndParameter ( float  raw, out float  metalness, out float  parameter  )

inline

Decode metalness and another float parameter from a unique 8-bit normalized value, using 5 bits for metalness and 3 bits ofr the other parameter.

Parameters

raw	the packed input value
metalness	will contain the normalized unpacked metalness
parameter	will contain the normalized unpacked other parameter

decodeRgbFrom10Plus2Bits()

vec3 GPUShaders::Common::Materials::decodeRgbFrom10Plus2Bits ( vec2  packed )

inline

Decode a RGB color from a 10 and a 2 bits normalized values

Parameters

packed

the packed values

Returns

the decoded color

encodeMaterial()

float GPUShaders::Common::Materials::encodeMaterial ( uint  material )

inline

Encode a material ID for storage in the G-buffer.

Parameters

material

the identifier to encode

Returns

the encoded value as a normalized float

encodeMetalnessAndParameter()

float GPUShaders::Common::Materials::encodeMetalnessAndParameter ( float  metalness, float  parameter  )

inline

Encode metalness and another float parameter into a unique 8-bit normalized value, assigning 5 bits to metalness and 3 bits to the other parameter.

Parameters

metalness	the metalness
parameter	the other parameter to pack

Returns

a normalized float value storing both packed inputs

encodeRgbOn10Plus2Bits()

vec2 GPUShaders::Common::Materials::encodeRgbOn10Plus2Bits ( vec3  rgb )

inline

Store a RGB color on 12 bits, split into 10 and 2 bits for storage in the Gbuffer.

Parameters

rgb	the color to pack

Returns

the 10 and 2 bits normalized values encoding the color

initMaterial()

Material GPUShaders::Common::Materials::initMaterial ( )

inline

Fill a material with default parameters.

Returns

the initialized material

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The documentation for this class was generated from the following file:

• resources/pbrdemo/shaders/materials.glsl