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mesh3.cpp

//FILE:         mesh3.cpp
//AUTHOR:       Nathan Cournia <nathan@cournia.com>

#include <GL/gl.h>
#include "mesh3.h"

mesh3::surface::~surface( void )
{
        //delete all triangles in surface
        for( iterator i = begin( ); i != end( ); ++i ) {
                delete *i;
        }
}

mesh3::mesh3( void )
{ }

mesh3::~mesh3( void )
{
        //delete vertexes
        for( point_list::iterator i = m_vertexes.begin( ); 
                i != m_vertexes.end( ); ++i ) {
                delete *i;
        }

        //delete normals
        for( normal_list::iterator i = m_normals.begin( ); 
                i != m_normals.end( ); ++i ) {
                delete *i;
        }

        //delete uvs
        for( uv_list::iterator i = m_uvs.begin( ); 
                i != m_uvs.end( ); ++i ) {
                delete *i;
        }
        
        //delete surfaces
        for( surface_list::iterator i = m_surfaces.begin( ); 
                i != m_surfaces.end( ); ++i ) {
                delete *i;
        }
}

void
mesh3::render_triangle( const mesh3::triangle& face ) const
{
        //is there a texture
        if( face.texture ) {
                //render triangle with texture
                face.texture.bind( );
                glBegin( GL_TRIANGLES );
                if( face.vertex[ 0 ].normal_index > 0 ) {
                        //render with normals
                        for( unsigned int i = 0; i < MESH3_VERTS; ++i ) {
                                glNormal3fv( *(m_normals[ face.vertex[ i ].normal_index ]) );
                                glTexCoord2fv( m_uvs[ face.vertex[ i ].uv_index ]->uv );
                                glVertex3fv( *(m_vertexes[ face.vertex[ i ].vertex_index ]) );
                        } 
                } else {
                        //render without normals
                        for( unsigned int i = 0; i < MESH3_VERTS; ++i ) {
                                glNormal3fv( *(m_normals[ face.vertex[ i ].normal_index ]) );
                                glTexCoord2fv( m_uvs[ face.vertex[ i ].uv_index ]->uv );
                                glVertex3fv( *(m_vertexes[ face.vertex[ i ].vertex_index ]) );
                        }
                }
                glEnd( );
        } else {
                //render without texture
                glBegin( GL_TRIANGLES );
                if( face.vertex[ 0 ].normal_index > 0 ) {
                        //render with normals
                        for( unsigned int i = 0; i < MESH3_VERTS; ++i ) {
                                glNormal3fv( *(m_normals[ face.vertex[ i ].normal_index ]) );
                                glVertex3fv( *(m_vertexes[ face.vertex[ i ].vertex_index ]) );
                        } 
                } else {
                        //render without normals
                        for( unsigned int i = 0; i < MESH3_VERTS; ++i ) {
                                glNormal3fv( *(m_normals[ face.vertex[ i ].normal_index ]) );
                                glVertex3fv( *(m_vertexes[ face.vertex[ i ].vertex_index ]) );
                        }
                }
                glEnd( );
        }
}

void
mesh3::render_surface( const mesh3::surface& surf ) const
{
        //for each triangle in the surface
        for( mesh3::surface::const_iterator i = surf.begin( ); 
                i != surf.end( ); ++i ) {
                //render the triangle
                render_triangle( **i );
        }
}

void
mesh3::render( void ) const
{
        //for each surface in the mesh
        for( surface_list::const_iterator i = m_surfaces.begin( ); 
                i != m_surfaces.end( ); ++i ) {
                //render the surface
                render_surface( **i );
        }
}

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