Open CASCADE Technology
7.3.1.dev

Describes material's BSDF (Bidirectional Scattering Distribution Function) used for physicallybased rendering (in path tracing engine). BSDF is represented as weighted mixture of basic BRDFs/BTDFs (Bidirectional Reflectance (Transmittance) Distribution Functions). More...
#include <Graphic3d_BSDF.hxx>
Public Member Functions  
Graphic3d_BSDF ()  
Creates uninitialized BSDF. More...  
void  Normalize () 
Normalizes BSDF components. More...  
bool  operator== (const Graphic3d_BSDF &theOther) const 
Performs comparison of two BSDFs. More...  
Static Public Member Functions  
static Graphic3d_BSDF  CreateDiffuse (const Graphic3d_Vec3 &theWeight) 
Creates BSDF describing diffuse (Lambertian) surface. More...  
static Graphic3d_BSDF  CreateMetallic (const Graphic3d_Vec3 &theWeight, const Graphic3d_Fresnel &theFresnel, const Standard_ShortReal theRoughness) 
Creates BSDF describing polished metalliclike surface. More...  
static Graphic3d_BSDF  CreateTransparent (const Graphic3d_Vec3 &theWeight, const Graphic3d_Vec3 &theAbsorptionColor, const Standard_ShortReal theAbsorptionCoeff) 
Creates BSDF describing transparent object. Transparent BSDF models simple transparency without refraction (the ray passes straight through the surface). More...  
static Graphic3d_BSDF  CreateGlass (const Graphic3d_Vec3 &theWeight, const Graphic3d_Vec3 &theAbsorptionColor, const Standard_ShortReal theAbsorptionCoeff, const Standard_ShortReal theRefractionIndex) 
Creates BSDF describing glasslike object. Glasslike BSDF mixes refraction and reflection effects at grazing angles using physicallybased Fresnel dielectric model. More...  
Data Fields  
Graphic3d_Vec4  Kc 
Weight of coat specular/glossy BRDF. More...  
Graphic3d_Vec3  Kd 
Weight of base diffuse BRDF. More...  
Graphic3d_Vec4  Ks 
Weight of base specular/glossy BRDF. More...  
Graphic3d_Vec3  Kt 
Weight of base specular/glossy BTDF. More...  
Graphic3d_Vec3  Le 
Radiance emitted by the surface. More...  
Graphic3d_Vec4  Absorption 
Volume scattering color/density. More...  
Graphic3d_Fresnel  FresnelCoat 
Parameters of Fresnel reflectance of coat layer. More...  
Graphic3d_Fresnel  FresnelBase 
Parameters of Fresnel reflectance of base layer. More...  
Describes material's BSDF (Bidirectional Scattering Distribution Function) used for physicallybased rendering (in path tracing engine). BSDF is represented as weighted mixture of basic BRDFs/BTDFs (Bidirectional Reflectance (Transmittance) Distribution Functions).
NOTE: OCCT uses twolayer material model. We have base diffuse, glossy, or transmissive layer, covered by one glossy/specular coat. In the current model, the layers themselves have no thickness; they can simply reflect light or transmits it to the layer under it. We use actual BRDF model only for direct reflection by the coat layer. For transmission through this layer, we approximate it as a flat specular surface.
Graphic3d_BSDF::Graphic3d_BSDF  (  ) 
Creates uninitialized BSDF.

static 
Creates BSDF describing diffuse (Lambertian) surface.

static 
Creates BSDF describing glasslike object. Glasslike BSDF mixes refraction and reflection effects at grazing angles using physicallybased Fresnel dielectric model.

static 
Creates BSDF describing polished metalliclike surface.

static 
Creates BSDF describing transparent object. Transparent BSDF models simple transparency without refraction (the ray passes straight through the surface).
void Graphic3d_BSDF::Normalize  (  ) 
Normalizes BSDF components.
bool Graphic3d_BSDF::operator==  (  const Graphic3d_BSDF &  theOther  )  const 
Performs comparison of two BSDFs.
Graphic3d_Vec4 Graphic3d_BSDF::Absorption 
Volume scattering color/density.
Graphic3d_Fresnel Graphic3d_BSDF::FresnelBase 
Parameters of Fresnel reflectance of base layer.
Graphic3d_Fresnel Graphic3d_BSDF::FresnelCoat 
Parameters of Fresnel reflectance of coat layer.
Graphic3d_Vec4 Graphic3d_BSDF::Kc 
Weight of coat specular/glossy BRDF.
Graphic3d_Vec3 Graphic3d_BSDF::Kd 
Weight of base diffuse BRDF.
Graphic3d_Vec4 Graphic3d_BSDF::Ks 
Weight of base specular/glossy BRDF.
Graphic3d_Vec3 Graphic3d_BSDF::Kt 
Weight of base specular/glossy BTDF.
Graphic3d_Vec3 Graphic3d_BSDF::Le 
Radiance emitted by the surface.