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 // Created by: NW,JPB,CAL
 // Copyright (c) 1991-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _Graphic3d_MaterialAspect_HeaderFile
 #define _Graphic3d_MaterialAspect_HeaderFile
 
 #include <Graphic3d_BSDF.hxx>
 #include <Graphic3d_PBRMaterial.hxx>
 #include <Graphic3d_NameOfMaterial.hxx>
 #include <Graphic3d_TypeOfMaterial.hxx>
 #include <Graphic3d_TypeOfReflection.hxx>
 #include <TCollection_AsciiString.hxx>
 #include <Quantity_Color.hxx>
 
 //! This class allows the definition of the type of a surface.
 //! Aspect attributes of a 3d face.
 //! Keywords: Material, FillArea, Shininess, Ambient, Color, Diffuse,
 //! Specular, Transparency, Emissive, ReflectionMode,
 //! BackFace, FrontFace, Reflection, Absorption
 class Graphic3d_MaterialAspect 
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! Returns the number of predefined textures.
   static Standard_Integer NumberOfMaterials() { return Graphic3d_NameOfMaterial_DEFAULT; }
 
   //! Returns the name of the predefined material of specified rank within range [1, NumberOfMaterials()].
   Standard_EXPORT static Standard_CString MaterialName (const Standard_Integer theRank);
 
   //! Returns the type of the predefined material of specified rank within range [1, NumberOfMaterials()].
   Standard_EXPORT static Graphic3d_TypeOfMaterial MaterialType (const Standard_Integer theRank);
 
   //! Finds the material for specified name.
   //! @param theName [in]  name to find
   //! @param theMat  [out] found material
   //! @return FALSE if name was unrecognized
   Standard_EXPORT static Standard_Boolean MaterialFromName (const Standard_CString theName,
                                                             Graphic3d_NameOfMaterial& theMat);
 
   //! Returns the material for specified name or Graphic3d_NameOfMaterial_DEFAULT if name is unknown.
   static Graphic3d_NameOfMaterial MaterialFromName (const Standard_CString theName)
   {
     Graphic3d_NameOfMaterial aMat = Graphic3d_NameOfMaterial_DEFAULT;
     MaterialFromName (theName, aMat);
     return aMat;
   }
 
 public:
 
   //! Creates a material from default values.
   Standard_EXPORT Graphic3d_MaterialAspect();
 
   //! Creates a generic material.
   Standard_EXPORT Graphic3d_MaterialAspect (const Graphic3d_NameOfMaterial theName);
 
   //! Returns the material name (within predefined enumeration).
   Graphic3d_NameOfMaterial Name() const { return myMaterialName; }
 
   //! Returns the material name within predefined enumeration which has been requested (before modifications).
   Graphic3d_NameOfMaterial RequestedName() const { return myRequestedMaterialName; }
 
   //! Returns the given name of this material. This might be:
   //! - given name set by method ::SetMaterialName()
   //! - standard name for a material within enumeration
   //! - "UserDefined" for non-standard material without name specified externally.
   const TCollection_AsciiString& StringName() const { return myStringName; }
 
   //! Returns the given name of this material. This might be:
   Standard_CString MaterialName() const { return myStringName.ToCString(); }
 
   //! The current material become a "UserDefined" material.
   //! Set the name of the "UserDefined" material.
   void SetMaterialName (const TCollection_AsciiString& theName)
   {
     // if a component of a "standard" material change, the
     // result is no more standard (a blue gold is not a gold)
     myMaterialName = Graphic3d_NameOfMaterial_UserDefined;
     myStringName   = theName;
   }
 
   //! Resets the material with the original values according to
   //! the material name but leave the current color values untouched
   //! for the material of type ASPECT.
   void Reset()
   {
     init (myRequestedMaterialName);
   }
 
   //! Returns the diffuse color of the surface.
   //! WARNING! This method does NOT return color for Graphic3d_MATERIAL_ASPECT material (color is defined by Graphic3d_Aspects::InteriorColor()).
   const Quantity_Color& Color() const { return myColors[Graphic3d_TOR_DIFFUSE]; }
 
   //! Modifies the ambient and diffuse color of the surface.
   //! WARNING! Has no effect for Graphic3d_MATERIAL_ASPECT material (color should be set to Graphic3d_Aspects::SetInteriorColor()).
   Standard_EXPORT void SetColor (const Quantity_Color& theColor);
 
   //! Returns the transparency coefficient of the surface (1.0 - Alpha); 0.0 means opaque.
   Standard_ShortReal Transparency() const { return myTransparencyCoef; }
 
   //! Returns the alpha coefficient of the surface (1.0 - Transparency); 1.0 means opaque.
   Standard_ShortReal Alpha() const { return 1.0f - myTransparencyCoef; }
 
   //! Modifies the transparency coefficient of the surface, where 0 is opaque and 1 is fully transparent.
   //! Transparency is applicable to materials that have at least one of reflection modes (ambient, diffuse, specular or emissive) enabled.
   //! See also SetReflectionModeOn() and SetReflectionModeOff() methods.
   //!
   //! Warning: Raises MaterialDefinitionError if given value is a negative value or greater than 1.0.
   Standard_EXPORT void SetTransparency (const Standard_ShortReal theValue);
 
   //! Modifies the alpha coefficient of the surface, where 1.0 is opaque and 0.0 is fully transparent.
   void SetAlpha (Standard_ShortReal theValue) { SetTransparency (1.0f - theValue); }
 
   //! Returns the ambient color of the surface.
   const Quantity_Color& AmbientColor() const { return myColors[Graphic3d_TOR_AMBIENT]; }
 
   //! Modifies the ambient color of the surface.
   Standard_EXPORT void SetAmbientColor (const Quantity_Color& theColor);
 
   //! Returns the diffuse color of the surface.
   const Quantity_Color& DiffuseColor() const { return myColors[Graphic3d_TOR_DIFFUSE]; }
 
   //! Modifies the diffuse color of the surface.
   Standard_EXPORT void SetDiffuseColor (const Quantity_Color& theColor);
 
   //! Returns the specular color of the surface.
   const Quantity_Color& SpecularColor() const { return myColors[Graphic3d_TOR_SPECULAR]; }
 
   //! Modifies the specular color of the surface.
   Standard_EXPORT void SetSpecularColor (const Quantity_Color& theColor);
 
   //! Returns the emissive color of the surface.
   const Quantity_Color& EmissiveColor() const { return myColors[Graphic3d_TOR_EMISSION]; }
 
   //! Modifies the emissive color of the surface.
   Standard_EXPORT void SetEmissiveColor (const Quantity_Color& theColor);
 
   //! Returns the luminosity of the surface.
   Standard_ShortReal Shininess() const { return myShininess; }
 
   //! Modifies the luminosity of the surface.
   //! Warning: Raises MaterialDefinitionError if given value is a negative value or greater than 1.0.
   Standard_EXPORT void SetShininess (const Standard_ShortReal theValue);
 
   //! Increases or decreases the luminosity.
   //! @param theDelta a signed percentage
   Standard_EXPORT void IncreaseShine (const Standard_ShortReal theDelta);
 
   //! Returns the refraction index of the material
   Standard_ShortReal RefractionIndex() const { return myRefractionIndex; }
 
   //! Modifies the refraction index of the material.
   //! Warning: Raises MaterialDefinitionError if given value is a lesser than 1.0.
   Standard_EXPORT void SetRefractionIndex (const Standard_ShortReal theValue);
 
   //! Returns BSDF (bidirectional scattering distribution function).
   const Graphic3d_BSDF& BSDF() const { return myBSDF; }
 
   //! Modifies the BSDF (bidirectional scattering distribution function).
   void SetBSDF (const Graphic3d_BSDF& theBSDF) { myBSDF = theBSDF; }
 
   //! Returns physically based representation of material
   const Graphic3d_PBRMaterial& PBRMaterial () const { return myPBRMaterial; }
 
   //! Modifies the physically based representation of material
   void SetPBRMaterial (const Graphic3d_PBRMaterial& thePBRMaterial) { myPBRMaterial = thePBRMaterial; }
 
   //! Returns TRUE if the reflection mode is active, FALSE otherwise.
   Standard_Boolean ReflectionMode (const Graphic3d_TypeOfReflection theType) const
   {
     return !myColors[theType].IsEqual (Quantity_NOC_BLACK);
   }
 
   //! Returns material type.
   Graphic3d_TypeOfMaterial MaterialType() const { return myMaterialType; }
 
   //! Returns TRUE if type of this material is equal to specified type.
   Standard_Boolean MaterialType (const Graphic3d_TypeOfMaterial theType) const { return myMaterialType == theType; }
 
   //! Set material type.
   Standard_EXPORT void SetMaterialType (const Graphic3d_TypeOfMaterial theType);
 
   //! Returns TRUE if this material differs from specified one.
   Standard_Boolean IsDifferent (const Graphic3d_MaterialAspect& theOther) const { return !IsEqual (theOther); }
 
   //! Returns TRUE if this material differs from specified one.
   Standard_Boolean operator!= (const Graphic3d_MaterialAspect& theOther) const { return IsDifferent (theOther); }
   
   //! Returns TRUE if this material is identical to specified one.
   Standard_Boolean IsEqual (const Graphic3d_MaterialAspect& theOther) const
   {
     return myTransparencyCoef == theOther.myTransparencyCoef
         && myRefractionIndex  == theOther.myRefractionIndex
         && myBSDF             == theOther.myBSDF
         && myPBRMaterial      == theOther.myPBRMaterial
         && myShininess        == theOther.myShininess
         && myColors[Graphic3d_TOR_AMBIENT]  == theOther.myColors[Graphic3d_TOR_AMBIENT]
         && myColors[Graphic3d_TOR_DIFFUSE]  == theOther.myColors[Graphic3d_TOR_DIFFUSE]
         && myColors[Graphic3d_TOR_SPECULAR] == theOther.myColors[Graphic3d_TOR_SPECULAR]
         && myColors[Graphic3d_TOR_EMISSION] == theOther.myColors[Graphic3d_TOR_EMISSION];
   }
 
   //! Returns TRUE if this material is identical to specified one.
   Standard_Boolean operator== (const Graphic3d_MaterialAspect& theOther) const { return IsEqual (theOther); }
 
   //! Dumps the content of me into the stream
   Standard_EXPORT void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const;
 
 public:
 
   //! Deactivates the reflective properties of the surface with specified reflection type.
   Standard_DEPRECATED("Deprecated method, specific material component should be zerroed instead")
   void SetReflectionModeOff (const Graphic3d_TypeOfReflection theType)
   {
     if (!ReflectionMode (theType))
     {
       return;
     }
 
     switch (theType)
     {
       case Graphic3d_TOR_AMBIENT:  SetAmbientColor (Quantity_NOC_BLACK); break;
       case Graphic3d_TOR_DIFFUSE:  SetDiffuseColor (Quantity_NOC_BLACK); break;
       case Graphic3d_TOR_SPECULAR: SetSpecularColor(Quantity_NOC_BLACK); break;
       case Graphic3d_TOR_EMISSION: SetEmissiveColor(Quantity_NOC_BLACK); break;
     }
   }
 
 private:
 
   //! Initialize the standard material.
   Standard_EXPORT void init (const Graphic3d_NameOfMaterial theName);
 
   //! Mark material as user defined.
   void setUserMaterial()
   {
     // if a component of a "standard" material change, the
     // result is no more standard (a blue gold is not a gold)
     if (myMaterialName != Graphic3d_NameOfMaterial_UserDefined)
     {
       myMaterialName = Graphic3d_NameOfMaterial_UserDefined;
       myStringName   = "UserDefined";
     }
   }
 
 private:
 
   Graphic3d_BSDF           myBSDF;
   Graphic3d_PBRMaterial    myPBRMaterial;
   TCollection_AsciiString  myStringName;
   Quantity_Color           myColors[Graphic3d_TypeOfReflection_NB];
   Standard_ShortReal       myTransparencyCoef;
   Standard_ShortReal       myRefractionIndex;
   Standard_ShortReal       myShininess;
 
   Graphic3d_TypeOfMaterial myMaterialType;
   Graphic3d_NameOfMaterial myMaterialName;
   Graphic3d_NameOfMaterial myRequestedMaterialName;
 
 };
 
 #endif // _Graphic3d_MaterialAspect_HeaderFile

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