basic/geometry/vrml_reader/VrmlChildren.cpp

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#include "stddef.h"
#include "utility.h"
#include "VrmlChildren.h"
#include "VrmlStack.h"
#include <geometry/igs/igs_group.h>

//=============================================================================
// destructor
//
// Description: reads the vrml node out of a file
//=============================================================================
VrmlChildren::~VrmlChildren()
{
        int i;
        int size = nodes.size();
        for( i = 0; i < size; i++ )
        {
                VrmlNode* node = nodes[ i ];
                node->Release();
        }
}

//=============================================================================
// Parse
//
// Description: reads the vrml node out of a file
//=============================================================================
void VrmlChildren::Parse( char*& buffer )
{
        EatWhite( buffer );

        while( buffer[ 0 ] != ']' )
        {
                Keyword keyword = VrmlNode::GetKeyword( buffer );

                //we must process define keywords differently
                EatWhite( buffer );
                if( keyword != VRML_Define )
                {
                        buffer++;
                }

                //parse the node
                VrmlNode* node = VrmlNode::ParseNode( keyword, buffer );

                if( node != NULL )
                {
                        node->AddRef();
                        nodes.push_back( node );
                }
                else
                {
                        assert( node != NULL );
                }
                EatWhite( buffer );

                //advance past a comma
                while( buffer[ 0 ] == ',' )
                {
                        buffer++;
                        EatWhite( buffer );
                }
        }

        //advance past the ']'
        EatWhite( buffer );
        buffer++;
}

//=============================================================================
// Render
//
// Description: renders the VrmlNode to the stack
//=============================================================================
void VrmlChildren::Render( VrmlStack& stack ) const
{
        int i;
        int size = this->nodes.size();
        for( i = 0; i < size; i++ )
        {
                VrmlNode* node = nodes[ i ];
                assert( node != NULL );
                node->Render( stack );
        }
}

//=============================================================================
// RenderOpenGl
//
// Description: renders this VRML object to OpenGL
//=============================================================================
void VrmlChildren::RenderOpenGl( VrmlStack& stack ) const
{
        int i;
        int size = this->nodes.size();
        for( i = 0; i < size; i++ )
        {
                VrmlNode* node = nodes[ i ];
                assert( node != NULL );
                VrmlStack substack = stack;
                node->RenderOpenGl( substack );
        }
}

//=============================================================================
// RenderToIGS
//
// Description: renders this VRML object to the faster to process 
//                              IanGraphicsSystem
//=============================================================================
IGS_Object* VrmlChildren::RenderToIGS( VrmlStack& stack ) const
{
        IGS_Group* group = new IGS_Group;

        int i;
        int size = this->nodes.size();
        for( i = 0; i < size; i++ )
        {
                VrmlNode* node = nodes[ i ];
                assert( node != NULL );
                VrmlStack substack = stack;
                IGS_Object* object = node->RenderToIGS( substack );
                if( object != NULL )
                {
                        group->AddObject( object );
                }
        }
        return group;
}

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