basic/geometry/vrml_reader/VrmlSeparator.cpp

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#include <assert.h>
#include <geometry/igs/IGS_Group.h>
#include "utility.h"
#include "VrmlSeparator.h"

//=============================================================================
// Destructor
//
// Description: deletes all the subnodes
//=============================================================================
VrmlSeparator::~VrmlSeparator()
{
        int i;
        for( i = 0; i < this->nodes.size(); i++ )
        {
                VrmlNode*& node = nodes[ i ];
                delete node;
                node = NULL;
        }
}

//=============================================================================
// Parse
//
// Description: Parses this node from a buffer
//=============================================================================
void VrmlSeparator::Parse( char*& buffer )
{
        EatWhite( buffer );

        while( *buffer != '}' )
        {
                Keyword keyword = VrmlNode::GetKeyword( buffer );
                EatWhite( buffer );

                if( keyword != VRML_RenderCulling )
                {
                        buffer++;
                }
                VrmlNode* node = VrmlNode::ParseNode( keyword, buffer );
                if( node != NULL )
                {
                        this->nodes.push_back( node );
                }
                else
                {
                        assert( node != NULL );
                }
                EatWhite( buffer );
        }

        //advance past trailing '}'
        buffer++;
}

//=============================================================================
// Render
//
// Description: Renders this node to the stack
//=============================================================================
void VrmlSeparator::Render( VrmlStack& stack ) const
{
        //do nothing on purpose - does not need to be recursive
}
//=============================================================================
// RenderOpenGl
//
// Description: Renders this node to the OpenGL context
//=============================================================================
void VrmlSeparator::RenderOpenGl( VrmlStack& stack ) const
{
        int i;
        int size = this->nodes.size();
        for( i = 0; i < size; i++ )
        {
                VrmlNode* node = this->nodes[ i ];
                node->RenderOpenGl( stack );
        }
}

//=============================================================================
// RenderToIGS
//
// Description: Renders this node using the stack to produce IGS objects
//=============================================================================
IGS_Object* VrmlSeparator::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 = this->nodes[ i ];
                IGS_Object* object = node->RenderToIGS( stack );
                if( object != NULL )
                {
                        group->AddObject( object );
                }
                else
                {
                        //some VRML nodes don't produce valid IGS objects. They're "helper" nodes
                }
        }
        return group;
}

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