// end a GL command list
void VRML_LAYER::glEnd( void )
{
switch( glcmd )
{
case GL_LINE_LOOP:
{
// add the loop to the list of outlines
std::list<int>* loop = new std::list<int>;
if( !loop )
break;
for( unsigned int i = 0; i < vlist.size(); ++i )
{
loop->push_back( vlist[i]->o );
}
outline.push_back( loop );
}
break;
case GL_TRIANGLE_FAN:
processFan();
break;
case GL_TRIANGLE_STRIP:
processStrip();
break;
case GL_TRIANGLES:
processTri();
break;
default:
break;
}
while( !vlist.empty() )
vlist.pop_back();
glcmd = 0;
}
// end a GL command list
void VRML_LAYER::glEnd( void )
{
switch( glcmd )
{
case GL_LINE_LOOP:
{
// add the loop to the list of outlines
std::list<int>* loop = new std::list<int>;
if( !loop )
break;
double firstX = 0.0;
double firstY = 0.0;
double lastX = 0.0;
double lastY = 0.0;
double curX, curY;
double area = 0.0;
if( vlist.size() > 0 )
{
loop->push_back( vlist[0]->o );
firstX = vlist[0]->x;
firstY = vlist[0]->y;
lastX = firstX;
lastY = firstY;
}
for( size_t i = 1; i < vlist.size(); ++i )
{
loop->push_back( vlist[i]->o );
curX = vlist[i]->x;
curY = vlist[i]->y;
area += ( curX - lastX ) * ( curY + lastY );
lastX = curX;
lastY = curY;
}
area += ( firstX - lastX ) * ( firstY + lastY );
outline.push_back( loop );
if( area <= 0.0 )
solid.push_back( true );
else
solid.push_back( false );
}
break;
case GL_TRIANGLE_FAN:
processFan();
break;
case GL_TRIANGLE_STRIP:
processStrip();
break;
case GL_TRIANGLES:
processTri();
break;
default:
break;
}
while( !vlist.empty() )
vlist.pop_back();
glcmd = 0;
}
