H3DGeneratedShaderNode.h

Go to the documentation of this file.

//    Copyright 2004-2019, SenseGraphics AB
//
//    This file is part of H3D API.
//
//    H3D API is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    H3D API is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with H3D API; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    A commercial license is also available. Please contact us at 
//    www.sensegraphics.com for more information.
//
//
//
#ifndef __H3DGENERATEDSHADERNODE_H__
#define __H3DGENERATEDSHADERNODE_H__
 
#include <H3D/ComposedShader.h>
#include <H3D/X3DTexture2DNode.h>
#include <H3D/SFMatrix4f.h>
 
namespace H3D {
 
  class H3DAPI_API H3DGeneratedShaderNode : 
    public ComposedShader {
  public:
  
    struct RebuildShader : 
      public TypedField< SFBool, void,  AnyNumber< Field > > {
      
      virtual void update() { 
        H3DGeneratedShaderNode *vn = 
          static_cast< H3DGeneratedShaderNode * >( getOwner() );
        vn->buildShader(); 
      }
    };
 
    H3DGeneratedShaderNode( Inst< DisplayList  > _displayList = 0,
                            Inst< SFNode       > _metadata    = 0,
                            Inst< SFBool       > _isSelected  = 0,
                            Inst< SFBool       > _isValid     = 0,
                            Inst< SFBool       > _activate    = 0,
                            Inst< SFString     > _language    = 0,
                            Inst< MFShaderPart > _parts       = 0,
                            Inst< SFBool       > _suppressUniformWarnings = 0,
                            Inst< MFString     > _fragmentShaderString = 0,
                            Inst< MFString     > _vertexShaderString = 0 );
    
    virtual void buildShader();
 
    virtual void preRender();
 
    H3DUniquePtr< MFString > fragmentShaderString;
 
    H3DUniquePtr< MFString > vertexShaderString;
 
    static H3DNodeDatabase database;
 
    //  protected:
 
    H3DUniquePtr< RebuildShader > rebuildShader;
 
    virtual string addUniformFields( ComposedShader *shader );
 
    virtual string getFunctionShaderString() { return ""; }
 
    struct VaryingVariable {
      string name;
 
      string type;
 
      string calculation;
      
      VaryingVariable( const string &_name,
                       const string &_type,
                       const string &_calculation ):
        name( _name ),
        type( _type ),
        calculation( _calculation ) {
      }
      
    };
 
    struct Attribute {
      string name;
 
      string type;
 
      Attribute( const string &_name,
                 const string &_type ) :
      name( _name ),
        type( _type ) {}
    };
 
    virtual void getVaryingVariables( vector< VaryingVariable > &/*variables*/ ) {}
 
    virtual void getAttributes( vector< Attribute > &/*attributes*/ ) {}
 
    virtual string getFinalFragmentShaderOutputString();
 
    virtual string getVertexShaderString();
 
    virtual string getFragmentShaderString() { return ""; }
 
    virtual string uniqueShaderName( const string &base_name );
 
    static string addUniformToFragmentShader( ComposedShader *shader,
                                              const string &name,
                                              const string &glsl_type,
                                              const Field::AccessType &access,
                                              Field *field,
                                              int array_size = -1,
                                              bool delete_unadded_field = true );
 
    // Duplicates the input field and routes it to the output.
    // Use this to add the render shader's H3DUniquePtr<field> to the shader.
    template<class T>
      T* copyAndRouteField(T *input) {
      T* f = new T;
      input->route( f );
      return f;
    }
    template<class T>
      T* copyAndRouteField(const H3DUniquePtr<T> &input) {
      T* f = new T;
      input->route( f );
      return f;
    } 
 
    string shader_id;
 
    virtual string getFragmentShaderHeader() { return ""; }
 
    virtual string getVertexShaderHeader() { return ""; }
 
  private:
    static unsigned int instance_count;
 };
}
 
#endif